P2284
Injector Control Pressure Sensor Circuit Range/Performance
Fuel injection (diesel ICP)
Generic OBD-II
Medium
What it means
P2284 means the injector control pressure (ICP) sensor is sending a reading that doesn't match what the ECM expects. On hydraulic-injector (HEUI) diesels this sensor reports the high-pressure oil that fires the injectors, so a bad reading can cause hard starting, rough running, and power loss. A frequent culprit is oil creeping into the sensor's connector.
Medium
Can I keep driving? Often drivable but may run rough, be hard to start, or lose power — on hydraulic-injector diesels a bad ICP reading can cause hard starting or stalling.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting or extended cranking
- Rough idle and hesitation
- Reduced power or surging under load
Common causes
Most likely first
- Failed injector control pressure (ICP) sensorLikely
- Oil or moisture intrusion in the ICP sensor connector (common)Common
- Open, shorted, or corroded ICP wiring/connectorCommon
- High-pressure oil system fault (IPR valve, leaks) on HEUI dieselsLess often
- Low or contaminated engine oil affecting injector actuationLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check engine oil level and condition first.
- Unplug the ICP connector and inspect for oil intrusion or corroded pins — a very common cause on Ford Power Stroke and similar HEUI engines.
- Compare the ICP sensor's live reading against desired injection control pressure with a scan tool.
- Inspect the wiring and ground for the sensor for opens, shorts, or high resistance.
- If the connector and wiring are good but the signal is implausible, replace the ICP sensor. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2284?+
It is usually drivable, but the engine may be hard to start, idle rough, or lose power. Because it can lead to stalling on hydraulic-injector diesels, have it checked promptly.
Can I just clear P2284?+
Clearing it is temporary — if the sensor, its connector (often oil-fouled), or the oil-pressure system is at fault, the code returns quickly.
Related codes
Often seen with P2284
Read & clear P2284 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