Network
generic / SAE
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.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / 42
Possible causes
- Module internal fault or sensor input drift high
- Software version mismatch after replacement medium
- Gateway module routing CAN messages incorrectly low
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
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–5 h
- Component: ecm pcm b
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012