OBD-II code · Network
U041B Invalid Data Received From Exhaust Gas Sensor Module A
A receiving module detected implausible data from exhaust gas sensor module A (smart wide-range O2 / lambda module). Lambda or pumping current values fail plausibility checks and are rejected.
Is it safe to drive with U041B?
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
- Exhaust Gas Sensor Module A
Related codes
- U046EInvalid Data Received From Exhaust Gas Sensor Module B
- U0418Invalid Data Received from Brake System Control Module
- U0419Invalid Data Received from Brake System Control Module
- U041AInvalid Data Received From Battery Isolation/Voltage Stabilization Control Module
- U041CInvalid Data Received From Rocker Arm Control Module A
- U041DInvalid Data Received From Rocker Arm Control Module B
- U041EInvalid Data Received From All Wheel Drive Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.