AEB Forward Collision Warning Circuit
The C0451 code means the vehicle's onboard diagnostic system has detected: AEB Forward Collision Warning Circuit. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $300 - $1500 (parts and labor)
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Common Symptoms
- AEB warning light on
- Forward collision warning disabled
- Automatic braking does not activate
- AEB system fault message on display
Probable Causes (Ranked by Likelihood)
- Dirty or blocked AEB sensor Very High
- AEB sensor misalignment after collision High
- Failed AEB control module Moderate
- AEB wiring harness damage Low
Step-by-Step Diagnostic Procedure
-
Clean AEB sensor area
-
Check sensor alignment with scan tool
-
Inspect AEB wiring for damage
-
Perform AEB system calibration
Frequently Asked Questions
What does code C0451 mean?
C0451 indicates a fault with the aeb forward collision warning circuit.
Can I drive with C0451?
You can drive short distances. The safety feature is disabled so use extra caution.
How much does it cost to fix C0451?
Typical repair costs are $300 - $1500 (parts and labor).
Sources
This page is built from documented references. Verify against your own service info before repair work.
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