OBD-II code · Network
U04B2 Invalid Data Received From Particulate Matter Sensor B
A receiving module detected implausible data from particulate matter sensor B (smart sensor with own ECU). PM concentration values fail plausibility checks and are rejected.
Is it safe to drive with U04B2?
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
- Pm Sensor B
Related codes
- U04A4Invalid Data Received From Particulate Matter Sensor A
- U04AFInvalid Data Received From Hybrid/EV Battery Interface Control Module O
- U04B0Invalid Data Received From Hybrid/EV Battery Interface Control Module P
- U04B1Invalid Data Received From Battery Monitor Module
- U04B3Invalid Data Received From Planetary Gear Set Control Module
- U04B4Invalid Data Received From Brake Blending Actuator
- U04B5Invalid Data Received From Brake System Control Module B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.