What it means
Cylinder 10 pressure sensor above upper plausibility — open signal or short to B+. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The engine controller monitors the signal from the cylinder 10 combustion pressure sensor. This code sets when the signal rises above its expected upper range, which can happen if the signal circuit is open or shorted to a power supply.
Common causes
Most likely first.
- Signal line shorted to supply
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check-engine light
- Rough running or misfire
- Reduced engine power
- Poor acceleration
How to diagnose it
- Save freeze-frame data and review cylinder 10 pressure-sensor live data for a reading stuck high.
- Inspect the cylinder 10 sensor connector and harness for damaged insulation, corrosion, loose pins, or signs of contact with a power source.
- Check for an open signal wire or a short to supply in the cylinder 10 circuit using the manufacturer’s wiring diagram.
- Verify the sensor supply, ground, and signal circuits against the manufacturer’s specification.
- If the circuit checks pass, test the cylinder 10 pressure sensor using the manufacturer’s procedure.
Common fixes
- Repair wiring that has shorted the cylinder 10 signal to a power supply.
- Repair an open or damaged signal wire in the cylinder 10 sensor circuit.
- Clean or repair a corroded or poorly seated sensor connector.
- Replace the cylinder 10 pressure sensor if it fails testing.
Can I keep driving?
If the engine runs roughly or has reduced power, avoid hard acceleration and arrange diagnosis soon. A high sensor signal can disrupt combustion feedback and contribute to poor running.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.