Network
generic / SAE
U0456
Invalid Data Received From Coolant Temperature Control Module
A receiving module detected implausible data from the coolant temperature (electric thermostat) control module. Temperature setpoint vs. actual values fail plausibility checks and are rejected.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / 56
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: medium
- DIY: shop recommended
- Estimated cost: 120–1000 €
- Estimated time: 0.5–3 h
- Component: coolant temperature module
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012