B0001 Diagnostic Guide
B0001 may point to a fault in the driver's airbag first inflator circuit monitored by the SRS unit.
Article vehicle: 2010-2017 Honda Accord 2.4 Gas
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2010-2017 Honda Accord 2.4 Gas
System overviews and published DTC guides for this vehicle family.
136 ready guides
Current article source coverage is 2010-2017 Honda Accord 2.4 Gas. Confirm the vehicle configuration before applying any diagnostic procedure.
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System overviews
Vehicle network and module communication system
Vehicle Network System Overview
Learn how F-CAN, B-CAN, module power and grounds, reporting-module U-codes, and network diagnosis work on the 2010-2017 Honda Accord 2.4 Gas.
Fuel system
Fuel System Overview
Learn how the early multiport fuel system and later K24W1 direct-injection system differ on the 2010-2017 Honda Accord 2.4 Gas and how to diagnose pressure, mixture, and cylinder faults.
EVAP
EVAP System Overview
Understand vapor storage, purge flow, vent control, and pressure feedback on the 2010-2017 Honda Accord 2.4 Gas before diagnosing its EVAP codes.
Engine timing and valve control
Engine Timing and Valve Control Overview
Understand mechanical timing, intake-cam VTC, VTEC valve-lift control, hydraulic operation, and feedback diagnosis on the 2010-2017 Honda Accord 2.4 Gas.
B0002 Diagnostic Guide
B0002 may indicate a fault in the SRS driver airbag second inflator circuit.
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B0010 Diagnostic Guide
B0010 may indicate an open circuit or increased resistance condition in the front passenger airbag inflator circuit.
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B0011 Diagnostic Guide
B0011 may indicate a fault in the front passenger airbag inflator circuit on this SRS system.
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B0020 Diagnostic Guide
B0020 may indicate an SRS concern involving the driver’s side airbag inflator circuit.
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B0021 Diagnostic Guide
B0021 may indicate an open circuit or increased resistance in the left side curtain airbag first inflator circuit.
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B0028 Diagnostic Guide
B0028 may indicate an SRS concern in the front passenger’s side airbag inflator circuit, often involving an open circuit or increased resistance condition.
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B0029 Diagnostic Guide
B0029 may indicate a fault in the right side curtain airbag inflator circuit on this vehicle.
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B0090 Diagnostic Guide
B0090 may indicate a no-signal condition from the left front impact sensor circuit.
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B0091 Diagnostic Guide
B0091 may indicate the SRS unit is not receiving the expected signal from the left side impact sensor circuit.
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B1036 Diagnostic Guide
B1036 may indicate a MICU-related body electrical circuit issue involving the path between the under-dash fuse and relay box and the gauge control module.
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B1077 Diagnostic Guide
B1077 may indicate that the MICU is not seeing the windshield wiper motor park signal as expected.
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B1129 Diagnostic Guide
B1129 may indicate that the MICU is seeing a driver's door lock knob switch input problem where lock and unlock signals can appear active together.
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Driver's Power Window Position Detect Circuit Malfunction
B1140 may mean the door control system is not seeing the driver's power window position detection signal as expected.
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B1145 Diagnostic Guide
B1145 may indicate that the front passenger window position detect circuit is not reporting window position as expected.
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B1175 Diagnostic Guide
B1175 may indicate that the gauge control module is seeing a possible malfunction in the fuel level sensor circuit.
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B1192 Diagnostic Guide
B1192 may mean the gauge control module is not communicating with the battery sensor ECU over the LIN communication line.
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B121A Diagnostic Guide
B121A may indicate that the climate control unit is seeing an open-type problem in the mode control motor circuit.
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B121B Diagnostic Guide
B121B may indicate a problem in the climate control mode control motor circuit, often involving the motor feedback or control path used to position the air outlet doors.
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B1225 Diagnostic Guide
This code may indicate an open or signal problem in the in-car temperature sensor circuit used by the climate control system.
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B1228 Diagnostic Guide
B1228 may indicate a short in the outside air temperature sensor circuit used by the climate control unit.
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B1229 Diagnostic Guide
B1229 may mean the climate control unit is seeing an open in the sunlight sensor circuit.
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B1231 Diagnostic Guide
This climate control code means the control unit may be seeing an open in the evaporator temperature sensor circuit.
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B1232 Diagnostic Guide
B1232 may indicate that the climate control unit is seeing an evaporator temperature sensor circuit short condition.
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Driver's Air Mix Control Motor Circuit Open
B1233 may mean the climate control unit is not seeing the driver's air mix control motor position circuit correctly.
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B1234 Diagnostic Guide
This code may indicate a short concern in the driver's air mix control motor circuit, where the climate control unit monitors driver's-side blend-door position feedback.
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Driver’S Air Mix Control Function Issue
B1235 may indicate that the climate control system is seeing a possible issue with the driver’s air mix control function, which is used to manage driver-side temperature blending.
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Passenger-Side Air Mix Control Motor Feedback Problem
B1236 may indicate that the climate control unit is seeing a possible problem with passenger-side air mix control motor feedback.
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— Passenger's Air Mix Control Motor Circuit Short
B1237 may indicate a passenger-side air mix control motor circuit short, where the climate control unit may not be receiving a believable position signal from that circuit.
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Passenger's Air Mix Control Motor Circuit, Linkage, Door, or Motor
B1238 may mean the climate control system is seeing a possible problem with the passenger side air mix control area, where door movement and commanded temperature response can be/c
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A Problem in the Mode Control Motor Circuit, Linkage, Door, or Motor
B1240 may indicate a problem in the climate control mode control motor circuit, linkage, door, or motor.
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A Problem in the Blower Motor Circuit
B1241 may indicate a problem in the blower motor circuit controlled by the climate control unit.
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Headlight Switch Position Circuit Malfunctions
B1275 may indicate a headlight switch position circuit malfunction where the MICU may not be seeing the expected combination light switch input.
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Headlight Switch Position Circuit
B1276 may indicate that the MICU is seeing an unexpected headlight switch position signal from the combination light switch circuit.
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MICU headlight switch position circuit malfunction
B1278 may mean the MICU is seeing a headlight switch position input that does not match the expected switch state.
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Keyless Access Power Control Unit IG1B Circuit Error
B12D1 may indicate that the keyless access power control unit is seeing an ignition relay circuit state that does not match what it expects.
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Keyless Access Power Control Unit
B12D2 may indicate that the keyless access power control unit is seeing an unexpected IG2 relay circuit state during power-mode operation.
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Driver Door LF Antenna Circuit Open
B1646 may mean the keyless access control unit is seeing the driver door low frequency antenna circuit as open.
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Passenger Door LF Antenna Circuit Open
B1648 may indicate a possible open in the passenger door low-frequency antenna circuit for the keyless access system.
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Trunk/Tailgate/Rear Bumper LF Antenna Circuit Open
B1658 may indicate a keyless access control unit concern related to the rear exterior antenna circuit.
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Front Interior LF Antenna Circuit Open
B1660 may mean the keyless access control unit is detecting an open condition in the front interior low-frequency antenna circuit.
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Rear Interior LF Antenna Circuit Problem
B1664 may indicate a problem in the rear interior LF antenna circuit used by the keyless access control system.
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Rear Shelf LF Antenna Circuit Open
B1668 may indicate an open circuit concern in the rear shelf LF antenna circuit for the keyless access system.
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SRS unit connector A not properly installed
This code may mean the SRS control unit is not seeing connector A as properly installed or connected.
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A Problem in the Recirculation Control Motor Circuit, Linkage, Door, or Motor - 2010-2017...
B2983 may indicate a problem with the HVAC recirculation control motor circuit, the recirculation motor, or the related air door and linkage.
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Recirculation Control Motor Position Or Feedback Circuit Issue
B2986 may indicate that the climate control unit is seeing an issue with the recirculation control motor position or feedback circuit.
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N communication failure, bus off
U0029 may mean the VSA control unit is seeing a CAN network communication problem where messages can become unreliable or stop being accepted normally.
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N Communication Failure, Bus OFF
U0029 may mean the VSA control side is seeing a CAN network communication problem where the network communication has dropped out or been shut down by a fault condition.
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Lost Communication With The PCM (PGM-FI System
U0100 means a control module may have lost communication with the PCM over the vehicle communication network.
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N Communication Failure - VSA Control Unit
U0104 can indicate a possible communication problem where the VSA control unit may not be receiving expected F-CAN communication from the module associated with this code.
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F-CAN Malfunction (PCM-VSA Modulator-Control Unit
U0122 often means the PCM may have a communication problem with the VSA modulator-control unit on the vehicle network.
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Gauge Control Module Lost Communication With EPS Unit
U0131 means the gauge control module may have lost communication with the EPS unit.
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Gauge Control Module Lost Communication With SRS Unit
U0151 means the gauge control module may have lost communication with the SRS unit on the vehicle network.
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F-CAN Malfunction (PCM-Gauge Control Module
U0155 may indicate a communication problem between the PCM and the gauge control module on the F-CAN network.
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Keyless Access and Power Window Communication Error
U0199 may indicate a communication problem involving the keyless access control unit and the body network connection to the power window unit.
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Auto High Beam Support System Communication Fault
U1280 may indicate a fault recognized by the auto high beam, or high-beam support, control system.
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Auto High Beam Support System Communication Fault
U1281 may indicate a communication-related concern involving the auto high beam support system control.
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Gauge Control Module Lost Communication With Parking and Backup Sensor Control Unit
U1288 may indicate a body-network communication problem involving the gauge control module and the parking and back-up sensor control unit on the B-CAN network.
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Auto High-Beam Control Unit Lost Communication With Gauge Control Module
U128D means the auto high-beam control unit may have lost communication with the gauge control module on the body communication network.
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F-CAN Malfunction
U129E is an F-CAN malfunction. It may mean the PCM is seeing a communication problem on the network path involving the keyless access control unit.
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Fuel Rail Pressure Too Low
P0087 may mean the direct-injection fuel rail pressure is lower than the vehicle expects under certain operating conditions.
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Fuel Rail Pressure Too High
P0088 means the ECM/PCM may be seeing fuel rail pressure higher than expected for the operating condition.
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IAT Sensor Circuit High Voltage
P0113 may mean the PCM is seeing the intake air temperature sensor signal voltage higher than expected.
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Fuel System Too Rich
P0172 means the ECM/PCM may be seeing a mixture that is richer than expected and may be reducing fuel correction to compensate.
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Knock Sensor Circuit High Voltage
P0328 may mean the PCM is seeing a high-voltage condition in the knock sensor circuit.
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CKP Sensor Circuit Intermittent Interruption
P0339 may indicate an intermittent interruption in the crankshaft position sensor circuit signal to the PCM.
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CMP Sensor A and CKP Sensor Incorrect Phase Detected
P0341 may indicate that the camshaft position signal and crankshaft position signal are not lining up as expected by the PCM.
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CMP Sensor A Circuit Intermittent Interruption
P0344 means the CMP sensor A signal may have an intermittent interruption, so the PCM may not always receive a steady camshaft position signal.
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CMP Sensor B Circuit Intermittent Interruption
P0369 may mean the PCM is seeing an intermittent loss or interruption of the camshaft position sensor B signal.
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EVAP System Low Purge Flow Detected
P0497 may mean the EVAP system is being commanded to purge, but the PCM is not seeing the expected purge-flow response.
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— EVAP canister vent shut valve circuit low voltage
P0498 means the PCM may be seeing the EVAP canister vent shut valve circuit voltage lower than expected.
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EVAP System High Purge Flow Detected
P04DF may mean the ECM/PCM is seeing EVAP purge flow behavior that is higher than expected or not plausible for the commanded state.
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EVAP System Low Purge Flow Detected
P04F1 may mean the EVAP system is detecting lower purge flow than expected during its self-test logic.
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CVT Speed Sensor Circuit Open/Short
P0502 may mean the PCM is seeing a low, missing, or incorrect CVT speed sensor signal.
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Cold Start Idle Air Control System Performance Problem
P050A may mean the PCM is not seeing the expected cold-start idle air control response.
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A/C Pressure Sensor Circuit Low Voltage
P0532 means the PCM may be seeing the A/C pressure sensor signal as lower than expected.
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A/C Pressure Sensor Circuit High Voltage
P0533 may mean the ECM/PCM is seeing the A/C pressure sensor signal higher than expected.
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PCM programming error
P0602 may mean the PCM has a programming or update-completion problem.
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PCM (A/T System) Internal Control Module Malfunction
P060A may mean the PCM has detected an internal control module problem related to the automatic transmission control side of the PCM logic.
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Starter Cut Relay Diagnosis Circuit Malfunction
P0615 may indicate that the PCM is detecting a problem in the starter cut relay diagnosis circuit.
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Sensor Reference Voltage A Malfunction
P0641 may indicate a problem with the sensor reference voltage A circuit.
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Sensor Reference Voltage B Malfunction
P0651 may mean the PCM is seeing a problem on a shared sensor reference-voltage circuit.
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G No Charging Malfunction
P065A may mean the ECM/PCM is seeing charging system behavior that does not match expected ACG operation.
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PCM Power Control Circuit/Internal Circuit Malfunction
P0685 may mean the PCM is seeing an unexpected condition in its power control circuit or an internal related circuit.
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vehicle speed signal error
P0720 may mean a control module is seeing vehicle speed information that does not agree with expected speed signals from related systems.
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Output Shaft Speed Sensor No Signal
P0722 may indicate that the PCM is not receiving the expected output shaft, or countershaft, speed signal.
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A/T Clutch Pressure Control Solenoid A Stuck On
P0747 may indicate that the automatic transmission pressure-control system is not behaving as expected by the PCM.
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Shift Solenoid Valve A Stuck ON
P0752 may indicate that shift solenoid valve A is stuck on or that the transmission control system is seeing behavior consistent with that condition.
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A/T): Shift Solenoid Valve B Stuck OFF
P0756 may indicate that shift solenoid valve B is not applying as expected, often described as stuck OFF.
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Shift Solenoid Valve B Stuck ON
P0757 may indicate that the PCM is detecting a shift-control condition involving shift solenoid valve B being stuck ON.
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Automatic Transmission Clutch Pressure Control Solenoid Valve B Control Path Problem - 201...
P0776 may indicate a problem in the automatic transmission clutch pressure control solenoid valve B control path.
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Shift Error
P0780 may indicate that the ECM/PCM is seeing CVT shift-control behavior that does not match expected operation.
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Intermediate Shaft Speed Sensor A Circuit No Signal
P0793 generally means the PCM may not be receiving the expected speed signal from the CVT drive pulley speed sensor circuit.
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A/T): Transmission Fluid Pressure Switch B (3rd Clutch) Circuit Low
P0847 may indicate the PCM is seeing a low signal from the transmission fluid pressure switch B, commonly described as the 3rd clutch pressure switch circuit.
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Transmission Fluid Pressure Switch B (3rd Clutch) Circuit High
P0848 may indicate the PCM is seeing a high signal from the transmission fluid pressure switch B circuit for the 3rd clutch.
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A/T): Transmission Fluid Pressure Switch C (4th Clutch) Circuit High
P0873 may indicate that the ECM/PCM is seeing a high signal from the transmission fluid pressure switch C circuit for the 4th clutch.
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Transmission Fluid Pressure Switch D Circuit High
This code may indicate that the PCM is seeing a high signal from the transmission fluid pressure switch D circuit for the 5th clutch.
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Transmission Control Circuit For A/T Clutch Pressure Control Solenoid Valve B Fault - 2010...
P0966 may indicate an electrical fault in the transmission control circuit for A/T clutch pressure control solenoid valve B.
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Shift Solenoid Valve A Open
P0974 may mean the PCM is seeing an open-type electrical fault in the shift solenoid valve A circuit.
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shift solenoid valve B short
P0976 may mean the transmission controller is seeing a possible low-side electrical fault in the shift solenoid valve B control circuit.
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shift solenoid valve C circuit open
P0980 generally means the control circuit for shift solenoid valve C may be open or not responding electrically as expected.
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A/T): Transmission Fluid Pressure Switch E (6th Clutch) Circuit High
P0990 may indicate that the PCM is seeing a high circuit condition from transmission fluid pressure switch E, also described as the 6th clutch pressure switch.
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VTC advance malfunction
P1009 may mean the variable cam timing system is not advancing as expected.
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RO Sensor Circuit Out of Range
P1109 may indicate the ECM/PCM is seeing the BARO sensor circuit as out of range.
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MAP sensor signal higher than expected
P1129 may mean the ECM/PCM is seeing a manifold absolute pressure signal that is higher than expected for the operating condition.
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ELD Circuit High Voltage
P1298 may mean the PCM is seeing an electric load detector circuit signal that appears high or out of the expected range for current electrical load conditions.
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FTP Sensor Circuit Range/Performance Problem
P1454 may mean the PCM is seeing fuel tank pressure sensor information that does not look plausible for the EVAP system conditions.
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EVAP System Purge Flow Malfunction
P145C may mean the ECM/PCM is seeing EVAP purge flow behavior that does not match what it expects.
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ttery Sensor Internal Failure
P154A may mean the ECM/PCM cannot trust the battery sensor information because the sensor or its related circuit may have a fault.
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ETCS Control Relay ON Malfunction
P1658 may mean the PCM is detecting an electronic throttle control relay circuit problem when the relay should be on.
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ETCS Control Relay OFF Malfunction
P1659 may mean the PCM is seeing an electronic throttle control relay response that does not match what it expects.
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Throttle Valve Default Position Spring Performance
P1683 may indicate the ECM or PCM is seeing throttle body default-position behavior that does not look right.
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— Alternator B Terminal Circuit Low Voltage
This code may mean the PCM is seeing the alternator B terminal circuit lower than expected.
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PGM-FI-ACG LIN communication error
P16E2 may mean the PCM is not communicating correctly with the alternator control circuit over the LIN communication line.
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PGM-FI-Battery Sensor LIN Communication Error
P16E3 may mean the ECM/PCM is not receiving the expected LIN communication from the PGM-FI battery sensor.
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Starter Cut Relay 1 Control Circuit Low Voltage
P16F3 may indicate that the ECM/PCM is seeing low voltage on the starter cut relay 1 control circuit.
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CVT Speed Control System
P1890 may indicate a CVT speed control system performance concern.
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— CVT Speed Control System
P1890 may mean the CVT speed control system is not behaving the way the control system expects during its monitor.
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CVT
P1898 may indicate a CVT hydraulic control issue related to pulley pressure control operation.
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CVT Hydraulic Pressure Control Performance
P1899 may indicate a CVT hydraulic pressure-control concern on this Accord.
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Post Catalyst Fuel Trim System Too Rich
P2097 may mean the PCM is seeing post-catalyst fuel trim as too rich.
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Throttle Position Sensor A/B Incorrect Voltage Correlation
P2135 may indicate that the PCM is seeing throttle position information that does not agree as expected.
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— Throttle Actuator Control System Idle Position Not Learned
P2176 generally means the ECM/PCM may not have a learned idle position for the electronic throttle actuator.
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Air Fuel Ratio Variation of Cylinders
P219A may mean the ECM/PCM is detecting that one cylinder’s air-fuel contribution is different from the others.
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RO Sensor Circuit Low Voltage
P2228 means the ECM/PCM may be seeing the barometric pressure sensor circuit voltage lower than expected.
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Barometric Pressure Sensor Circuit High Voltage
P2229 may indicate that the ECM/PCM is seeing a barometric pressure signal that is higher than expected.
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EVAP canister vent shut valve stuck closed malfunction
P2422 may mean the EVAP system is seeing behavior consistent with the canister vent side being stuck closed, restricted, or not matching the expected fuel tank pressure response.
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PCM Ignition Off Internal Timer Malfunction
P2610 may mean the PCM is seeing a problem with its ignition-off internal timer logic.
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High Pressure Fuel Pump Spill Valve Malfunction
P2623 may indicate that the ECM/PCM is seeing a problem with the high pressure fuel pump spill valve control circuit.
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Rocker Arm Oil Pressure Switch Circuit High Voltage
P2647 may mean the PCM is seeing a high-voltage condition from the rocker arm oil pressure switch circuit used to monitor VTEC oil pressure operation.
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Rocker Arm Oil Control Solenoid Circuit High Voltage
P2649 can mean the ECM or PCM is seeing a high-voltage condition on the rocker arm oil control solenoid, often described as the VTEC solenoid valve A circuit.
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CVT Lock-Up Clutch Control Solenoid Stuck On
P2715 may indicate that the CVT and ECM/PCM are seeing a lock-up clutch control concern.
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A/T): A/T Clutch Pressure Control Solenoid Valve D High Input
P2721 can indicate a possible high-input electrical concern in the A/T clutch pressure control solenoid valve D circuit.
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Line Pressure Solenoid Valve A Stuck ON
P2821 may indicate that the transmission control side is seeing line pressure solenoid valve A act stuck on or not respond as expected.
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Line Pressure Solenoid Valve A High Input
P2827 may indicate a high-input electrical fault in the line pressure solenoid valve A control circuit for the automatic transmission.
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Multipurpose Camera Unit
U0416 may indicate that the multipurpose camera unit is receiving or evaluating data that it considers invalid or not believable, often involving information shared with the VSA or
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