P2285
Injector Control Pressure Sensor Circuit Low
Fuel injection (diesel HEUI)
Generic OBD-II
High
What it means
P2285 means the injection control pressure (ICP) sensor circuit is reading low voltage on a diesel that uses hydraulically-actuated injectors. Because the ECM depends on this sensor to control injection, a fault can cause hard starting, stalling, or a no-start. An oil-fouled connector or damaged wiring is a frequent cause.
High
Can I keep driving? May cause hard starting, stalling, or no-start on HEUI diesels — the ECM relies on this sensor to control injection, so repair promptly.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting or no-start
- Stalling, especially at idle
- Rough running and low power
- Black smoke or misfire under load
Common causes
Most likely first
- Faulty injection (injector) control pressure sensorLikely
- Wiring open or shorted to ground in the ICP circuitCommon
- Corroded or oil-contaminated ICP connectorCommon
- Leak in the high-pressure oil system feeding the injectorsLess often
- Fuel injector control module (FICM) or driver faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare commanded vs actual ICP at key-on and cranking.
- Inspect the ICP sensor connector for oil intrusion or corrosion — a very common cause.
- Check the signal, reference, and ground wires for shorts to ground or opens.
- Test the high-pressure oil system for leaks affecting injection control pressure.
- Replace the ICP sensor if the circuit checks out, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2285?+
Not really — because the ECM uses this sensor to manage injection, the engine can stall or refuse to start. Have it fixed before relying on the vehicle.
Can I just clear P2285?+
It will return, and clearing won't restore normal starting. Fix the sensor, connector, or wiring fault first.
Related codes
Often seen with P2285
Read & clear P2285 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX