Invalid Data Received From Restraint Control Module
The U0423 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From Restraint Control Module. This is a critical severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $200 - $1,000 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Airbag warning light on
- Seatbelt pretensioner fault
- Occupant detection system error
- Supplemental restraint system warning
- Side airbag indicator on
Probable Causes (Ranked by Likelihood)
- Restraint module sending invalid data Very High
- Crash sensor intermittent fault High
- CAN bus noise affecting restraint data Moderate
- Clockspring wiring intermittent Low
Step-by-Step Diagnostic Procedure
-
Scan restraint module for specific sensor codes
-
Check clockspring wiring at steering column
-
Test crash sensors individually
-
Inspect restraint module connector
Frequently Asked Questions
Can I drive with U0423?
Yes, but airbags may not deploy correctly in a crash. Get it repaired promptly.
What causes U0423?
Usually the restraint module sending corrupted data from a sensor fault or clockspring issue.
Is U0423 a safety risk?
Yes. Airbag deployment may be affected, which is critical in an accident.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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