U0622Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 2
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- U0622 covers the second exhaust temperature measuring point on bank 2 when it is a digital sensor that transmits its value as SENT or CAN messages. The controller sets it once those messages stop or keep failing their checks, for instance after a broken signal wire, a lost 5 V supply or a fault inside the sensor module, an electronics box that on active sensors must tolerate up to 140 °C beneath the car. No manufacturer publicly documents U0622: GM's diesels with SENT temperature sensors have only one bank, and the Bentley V8 bulletins name only the sensors at position 1. CARB requires a dedicated code for a digital input that stops communicating, which is the role of this code. Judging by the documented neighbours, the harness routing near the exhaust is the first thing to inspect. Analog faults here are P2034 to P2036.
- What you may notice
- Malfunction indicator lamp
- Exhaust temperature for bank 2 sensor 2 missing in live data
- Likely causes
- LikelySensor wiring chafed or melted along the bank 2 exhaust
- Possible5 V supply or ground to the sensor interrupted
- PossibleHeat-damaged electronics module of the sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.