What this code means
P0339 means the CKP sensor circuit may have an intermittent interruption.
P0339 concerns an intermittent interruption in the crankshaft-position signal. The PCM evaluates the pulses described by the code. An intermittent condition is one that may appear during one operating state and not another, so the confirmation uses the particular conditions given in the procedure.
The inspection path includes the CKP sensor, its connections, ground connections and the CKP pulse plate. These are different inspection areas. The code establishes which signal is being investigated; the following checks narrow the fault area through the stated observations.
What the vehicle may do
- The PCM may store this code when pulse counts are unexpected.
Possible fault areas
- Possible connection problems include the CKP sensor and PCM connections.
- Engine ground and body ground connections may also have problems.
- The CKP pulse plate or CKP sensor may be at fault.
The confirmation begins with the specified idle check. The recorded-condition drive follows where directed, using the snapshot parameters listed in the procedure. Keep the instruction about completing confirmation once the failure has been duplicated attached to that sequence.
The physical inspections then address sensor/PCM connections, ground connections and the CKP pulse plate. Each has a stated normal condition. The final CKP sensor conclusion depends on the other inspection items being normal.
Diagnostic path
Understand the stored condition
P0339 points to an intermittent interruption in the Crankshaft Position (CKP) Sensor circuit. If the pulses between reference pulses differ from the specified value, the PCM detects a fault and stores this code. Possible fault areas include the sensor, its connections, the grounds, and the CKP pulse plate.
Address indicated transmission codes first
Troubleshoot any DTCs listed or indicated systems below first. A/T System [AT]: Go to the indicated DTC's troubleshooting. If any DTCs are indicated for A/T System [AT], finish troubleshooting those codes before continuing with P0339.
Check during idle
Run the confirmation checks in order. If the failure is duplicated, the confirmation procedure is complete. Start the engine and let it idle for 10 seconds or more. Then monitor the HDS [OBD STATUS (PGM-FI)] for DTC P0339.
Check under recorded driving conditions
Next, test-drive the vehicle for several minutes. Stay in the same Engine Speed and Vehicle Speed range as the recorded on-board snapshot parameters. You can find Engine Speed and Vehicle Speed in the HDS function PGM-FI > Data List. Then monitor the HDS [OBD STATUS (PGM-FI)] for DTC P0339. If the failure is duplicated, the confirmation procedure is complete.
The recorded Engine Speed and Vehicle Speed provide the reference for the driving condition used here. Matching that range keeps the status observation associated with the condition the procedure asks to reproduce. It also keeps this stage distinct from the earlier idle observation.
Check the sensor and PCM connections
Now check the connectors at the CKP sensor and PCM for secure connections or loose terminals. The connections and terminals should be in good condition. If they are not, there is a problem with those connections or terminals.
Check the ground connections
Check the engine ground and body ground connectors for secure connections or loose terminals. The connections and terminals should be in good condition. If they are not, there is a problem with those connections or terminals.
Look over the CKP pulse plate
The CKP sensor must be removed for this check. Visually inspect the CKP pulse plate for looseness or damage. There should be no looseness or damage. If either is present, there is a problem with the CKP pulse plate.
This is the visual-condition check for the CKP pulse plate. Carry out the stated access preparation before applying the looseness-or-damage criterion. The finding belongs to the pulse plate inspection, while the sensor conclusion later in the procedure has the additional condition that the other checks are normal.
Understand the remaining sensor conclusion
If all the other checks show normal conditions, the CKP sensor is identified as the cause.
Final check
Possible fault areas include sensor and PCM connections, ground connections, the CKP pulse plate, and the CKP sensor.
The result should identify what was observed during confirmation and which connection, ground or CKP pulse plate inspection was normal or abnormal. Retain those findings together. The final conclusion about the CKP sensor is supported by the stated combination of results, not by the intermittent-code description alone.
