P2CE7Particulate Filter Pressure Sensor C Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2CE7 means the raw signal of filter pressure sensor C has dropped below its electrical floor, the typical picture of a signal wire shorted to ground or a lost 5 V supply. GM's 2025 diesel tables, where C is the relative pressure sensor behind the particulate filter, set it when the raw value is under 0.02 % in 158 of 200 samples taken every 12.5 ms with the ignition in range and the engine not cranking; it is Type B, so the lamp follows on the second trip. Ford's 2024–25 petrol summary uses the same code for an analog sensor C on its gasoline particulate filters, with a limit of 0.3 V held for 5 s. Checking reference, ground and signal at the plug comes before replacing the sensor. The high counterpart is P2CE8; sensor D has P2CEC.
- What you may notice
- Warning lamp on
- Live data shows sensor C at minimum regardless of engine load
- Regeneration planning relies on a soot model only
- Likely causes
- LikelySignal wire of sensor C shorted to ground, often from heat damage near the exhaust
- Possible5 V supply to the sensor interrupted
- PossibleSensor C internally failed with output stuck low
- 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: €30 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.