OBD-II code · Network
U0286 Lost Communication With Radiator Anti-Tamper Device
The vehicle bus reports loss of communication with the radiator anti-tamper device. Detection of unauthorised changes to the cooling system can no longer be confirmed by this node.
Is it safe to drive with U0286?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
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
- 0.5–2 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Radiator Anti Tamper Device, Vehicle Bus Wiring
Related codes
- U027CLost Communication With Off-Board Charger Control Module
- U0284Lost Communication With Active Grille Air Shutter Module A
- U0285Lost Communication With Active Grille Air Shutter Module B
- U0287Lost Communication With Transmission Fluid Pump Module A
- U0288Lost Communication With DC/AC Converter Control Module A
- U0289Lost Communication With DC/AC Converter Control Module B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.