DTC code

B1231: B1231 Diagnostic Guide

Vehicle-specific published guides for this diagnostic trouble code.

B1231 Diagnostic Guide

This climate control code means the control unit may be seeing an open in the evaporator temperature sensor circuit.

Article vehicle: 2010-2017 Honda Accord 2.4 Gas

B1231 may indicate that the climate control unit is seeing an open circuit condition for the evaporator temperature sensor signal.

Article vehicle: 2010-2015 Honda Civic 1.8 Gas

B1231 may indicate that the climate control unit is seeing an open condition in the evaporator temperature sensor circuit.

Article vehicle: 2010-2016 Honda Cr V 2.4 Gas

B1231 may mean the climate control unit is seeing an evaporator temperature sensor input that is higher than expected.

Article vehicle: 2016-2024 Honda Civic 2.0 Gas

B1231 may indicate the climate control unit is seeing the evaporator temperature sensor circuit like an open or high-signal condition.

Article vehicle: 2017-2025 Honda Cr V 1.5TurboGas