C0545: VIN Not Programmed or Incompatible - BSCM

What it means

The BSCM checks the stored vehicle identification number against the VIN expected by the vehicle’s configuration. It sets this code when the VIN is missing or the stored VIN is incompatible.

How it works

The brake system control module (BSCM) stores the vehicle identification number so it can confirm that its configuration matches the vehicle. This code sets when the VIN is absent or incompatible, commonly after BSCM replacement without VIN programming.

Common causes

Most likely first.

1. VIN not programmed after BSCM replacement

Symptoms

• ABS warning light on
• Traction or stability control warning light on
• ABS functions may be limited

How to diagnose it

1. Scan the BSCM and note its identification and configuration data, including whether a VIN is stored.
2. Compare the VIN reported by the BSCM with the vehicle's VIN and the configuration information available for the vehicle.
3. Check service records to see whether the BSCM was recently replaced or reconfigured.
4. Confirm that the installed BSCM is correct for the vehicle using the manufacturer's parts and configuration information.
5. If the module is correct but its VIN is missing or incompatible, program it using the manufacturer's approved procedure and rescan for the code.

Common fixes

• Program the vehicle VIN into the replacement BSCM using the approved configuration procedure.
• Correct the BSCM configuration if it does not match the vehicle.
• Replace an incompatible BSCM with the correct unit, then program it for the vehicle.

Can I keep driving?

The ABS, traction, or stability warning may indicate those functions are limited, even if ordinary braking feels normal. Drive cautiously and have the BSCM configuration corrected promptly.