B0402 - Immobilizer Key Collation NG
B0402 Possible Causes
- Incorrect Immobilizer Key
- Immobilizer Key Not Programmed
- Faulty Body Integrated Unit (BIU)
Cost of diagnosing the B0402 code
The cost of diagnosing the B0402 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0402 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
The Immobilizer system performs the starter relay control. The Body Integrated Unit (BIU) detects the inconformity of reference code, immediately output the starter relay cut signal to Engine Control Module (ECM
), and then ECM
stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM
. Check that the engine does not start on the DTC of body integrated unit.
B0402 Information for specific makes