U066ELost Communication With Charge Air Cooler Temperature Sensor Bank 2
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- A bank 2 charge air temperature only exists on V or boxer engines that run one turbocharger and one intercooler per cylinder bank. There the controller can compare both sides, and a mismatch belongs to P007F, the bank 1/bank 2 correlation code. U066E is the digital-link failure for the bank 2 sensor: its frames are missing or unusable, so that comparison and any per-bank boost correction lose their input. None of the Ford or GM OBD summaries examined shows a bank 2 charge air sensor at all, let alone a digital one, so no manufacturer can be named; analog faults would be P00A0 to P00A4. CARB's (f)(7.2.4) undercooling monitor applies per cooler. The controller substitutes the bank 1 value or a model; the driver rarely notices more than the warning lamp.
- What you may notice
- Check engine light
- Possible additional bank correlation code (P007F)
- Mostly unchanged driving behaviour
- Likely causes
- LikelyWiring to the bank 2 charge air sensor damaged, often routed near the hot side
- PossibleConnector at the bank 2 charge air pipe loose or oily
- PossibleBank 2 sensor electronics failed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.