P2CCBCoolant Pump Speed Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2CCB covers the upper end of the coolant pump speed sensor signal: the input stays above its permitted maximum. On sensors with an open-collector output and a pull-up resistor in the controller, an interrupted signal wire or a sensor that has lost its ground leaves the line resting high, so the open case often lands here rather than under P2CCA. A short between the signal wire and a voltage feed has the same effect. No manufacturer documents P2CCB publicly. GM's patent US20160047374A1 shows why the controller needs a valid reading: it judges the pump by comparing measured and target speed. CARB requires range checks for inputs like this. Checking the sensor ground and the signal wire for continuity usually finds the fault. Low levels are P2CCA, a general circuit fault P2CC8.
- What you may notice
- MIL on
- Pump speed missing or stuck at an implausible value in live data
- Likely causes
- LikelyOpen signal wire, input pulled up by the controller
- PossibleLost ground connection at the sensor
- PossibleSignal wire shorted to a voltage feed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €30 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.