OBD-II code · Network
U0551 Invalid Data Received From Impact Classification System Module
A receiving module detected implausible data from the impact classification module. Crash sensor profile values fail plausibility checks against other restraint inputs and are rejected.
Is it safe to drive with U0551?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Impact Classification Module
Related codes
- U054EInvalid Data Received From Seat Control Module J
- U054FInvalid Data Received From Side Obstacle Detection Control Module C
- U0550Invalid Data Received From Side Obstacle Detection Control Module D
- U0552Invalid Data Received From Running Board Control Module B
- U0553Invalid Data Received From Lighting Control Module — Rear B
- U0554Invalid Data Received From Accessory Protocol Interface Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.