Fault Code B0820
Code meaning, symptoms, possible causes, part number, and estimated cost.
B0820
Immobilizer Key Code Mismatch
This code indicates a mismatch between the key code and the code stored in the immobilizer module. This occurs when the system does not recognize the key as authorized to start the vehicle, preventing ignition.
Part Details
Part Name
Immobilizer Module / Key
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪700 - ₪2800
Engine Location
Immobilizer control unit
Symptoms
- Vehicle unable to start
- Security light flashing/constantly on
- System prevents starting
- Difficulty synchronizing with a new key
Possible Causes
- 1Use of an incompatible/uncoded key
- 2Fault in key coding
- 3Immobilizer module issue
- 4Damage to the key
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