OBD-II code · Network
U0441 Invalid Data Received From Emissions Critical Control Information
A receiving module detected implausible data tagged as emissions-critical (CARB OBD requirement). The receiver discards the message and may set the MIL because emissions monitors cannot run.
Is it safe to drive with U0441?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Vehicle Bus Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.