OBD-II code · Network
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.
Is it safe to drive with U0456?
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
- Coolant Temperature Module
Related codes
- U0453Invalid Data Received From Side Restraints Control Module — Left
- U0454Invalid Data Received From Side Restraints Control Module — Right
- U0455Invalid Data Received From Restraints Occupant Classification System Module
- U0457Invalid Data Received From Information Center A
- U0458Invalid Data Received From Information Center B
- U0459Invalid Data Received From Head Up Display
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.