P1626 BUICK, CADILLAC, CHEVROLET, GMC: THEFT-DETERRENT FUEL ENABLE SIGNAL NOT RECEIVED
POST UPDATED IN February, 2023
P1626 BUICK, CADILLAC, CHEVROLET, GMC: THEFT-DETERRENT FUEL ENABLE SIGNAL NOT RECEIVED
The ECM (Engine Control Module) controls the fuel injection system. This controller constantly data from sensors and other devices that directly affect the operation of the car. The ECM also diagnoses the fuel injection system. It can recognize some operational problems and warn the driver via the malfunction indicator lamp (MIL or Check Engine). Besides, the ECM stores a DTC code that identifies problem areas to help technicians perform various repairs.
The immobilizer control unit allows the engine to run once the ignition switch is turned on, but the code read by the key must be the right one. If the ECM detects a failure of the communication link with the immobilizer controller, the diagnostic code P1626 OBDII will be set. In this case, there is no immobilizer message identification for the ECM release time window.
Reasons to set the P1626 OBD2 fault code:
Steps to troubleshoot the DTC P1626 OBDII: