U0692Lost Communication With Exhaust Pressure Sensor B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- Exhaust pressure sensor B is a second pressure point in the exhaust, whose location the maker defines, for instance on the other bank or behind the turbine. U0692 means its digital output, usually SENT, has stopped delivering valid frames. Code-specific documentation from a manufacturer is not public. Ford's 2023 diesel summary has only one exhaust pressure sensor, the SENT unit ahead of the turbine with U0691, and GM's 2025 diesel tables list no B sensor. CARB names exhaust pressure sensor output among the values diesel OBD systems must report and requires a separate code when a digitally coded input stops communicating. Analog circuit faults of sensor B are P047A to P047E; sensor C has U069F. What the driver notices depends on what the reading is used for, ranging from nothing beyond the lamp to reduced power.
- What you may notice
- Check engine light
- Possibly reduced power
- Likely causes
- LikelyWiring to pressure sensor B damaged by exhaust heat
- PossibleSensor B electronics failed
- PossibleConnector corroded
- 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 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.