P1612 INFINITI, NISSAN: CHAIN OF ECM-IMMU
POST UPDATED IN January, 2023
P1612 INFINITI, NISSAN: CHAIN OF ECM-IMMU
The immobilizer is part of the car’s security system. This device prevents the engine from starting without the use of the transponder key, thus achieving a significant decrease in car theft.
Modern immobilizer systems use rolling codes through which it is possible to prevent the key or controller code from being copied. The key is activated by an internal microcircuit activated by an electromagnetic field. This electromagnetic field induces voltage flowing in the key that produces or emits a binary code read by the Engine Control Module (ECM). If this controller detects that the key is valid, the injection sequence is allowed.
When DTC P1612 OBD2 is set, it is because the immobilizer has experienced a wrong operation. Specifically, on Nissan vehicles, this code signals that the ECM has not received the ID signal or binary code that allows the engine to start.
OBDII fault code P1612 is set by one or more of the following reasons:
To troubleshoot the P1612 OBD2 diagnostic code, consider this: