OBD-II code · Network
U0442 Invalid Data Received From ECM/PCM B
A receiving module detected implausible data from the second engine/powertrain control module (ECM/PCM B — used on V-engines with one ECU per bank or master/slave architectures). Engine torque, RPM or load values fail plausibility checks and are rejected.
Is it safe to drive with U0442?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
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
- 1–5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Ecm Pcm B
Related codes
- U043FInvalid Data Received From Vacuum Sensor B
- U0440Invalid Data Received from Drive Motor Control Module
- U0441Invalid Data Received From Emissions Critical Control Information
- U0443Invalid Data Received From Body Control Module B
- U0444Invalid Data Received From Body Control Module C
- U0445Invalid Data Received From Body Control Module D
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.