OBD-II code · Network
U069E Lost Communication With Coolant Heater A
The vehicle bus reports loss of communication with smart coolant heater A (PTC or fuel-fired booster). Cabin/coolant warm-up assistance cannot be commanded.
Is it safe to drive with U069E?
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
- 0.5–4 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Coolant Heater A, Vehicle Bus Wiring
Related codes
- U069BLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4
- U069CLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 3
- U069DLost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 4
- U069FLost Communication With Exhaust Pressure Sensor C
- U0901Invalid Data from Ion Sense Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.