DTC B1D9C Jeep
Sensor Reference Voltage A Circuit High
Sensor Reference Voltage A Circuit High
Description
P0642 is set when the voltage below 4240mV - minimum voltage of sensor power supply from ECM - is detected for more than 3sec. This code is due to the short to ground in sensor power circuit or the voltage problem inside of ECM.
Cause and Solution
Open or short to battery in power circuit Poor connection or damaged harness Faulty ECM
Video Guide
Diagnostic Info
- DTC Code: B1D9C
- Brand: Jeep