C0546

VIN Not Programmed or Incompatible

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Problems starting the engine
Airbag system malfunction

Causes

New ECU without VIN programmed
Incompatible ECU
Errors when programming VIN
Wiring harness damage

How to Fix

Check the correctness of the VIN in the car documents
Program VIN using diagnostic equipment
Replace the ECU with a compatible one if necessary
Check the integrity of the wiring harness

Related codes

B0001 B0010 P1602