OBD-II code · Network
U066E Lost Communication With Charge Air Cooler Temperature Sensor Bank 2
The vehicle bus reports loss of communication with smart charge air cooler (intercooler) temperature sensor on bank 2. Charge-air density correction switches to a substitute value.
Is it safe to drive with U066E?
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
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cac Temp Sensor Bank 2, Vehicle Bus Wiring
Related codes
- U066DLost Communication With Charge Air Cooler Temperature Sensor Bank 1
- U066BLost Communication With Turbocharger/Supercharger Bypass Valve B Position Sensor
- U066CLost Communication With Exhaust Heat Exchanger Bypass Valve Actuator B
- U066FLost Communication With Low Pressure Fuel System Sensor
- U0670Lost Communication With Fuel Temperature Sensor A
- U0671Lost Communication With Fuel Temperature Sensor B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.