P2284: Injector Control Pressure Sensor Circuit Range/Performance
What to do
Expect hard starting and rough running. Ask whether the pressure has been measured independently rather than only read from this sensor — the code cannot tell a drifting sensor from a system genuinely not making pressure, and those are very different repairs. A quick check that the sensor reads near zero with the engine off is free and settles a good proportion of these.
What this code means
The injection control pressure sensor is producing a reading that is electrically valid but does not match what the module expects for the conditions.
The distinction that matters here is between a sensor reading wrongly and a system genuinely delivering the wrong pressure — the same ambiguity the corpus meets at P2201. The module compares the pressure it commanded against the pressure it is told exists, and a mismatch could be either side of that comparison. A sensor drifting slowly with age and one reporting accurately on a system that cannot hold pressure look identical in a code list.
What separates them is a mechanical pressure reading taken independently, which is the measurement to ask for. Where that is not available, a sensor whose reading is implausible with the engine stopped — it should sit at atmospheric — is fairly conclusive on its own and costs nothing to check.
Likely causes
Start here
- Faulty injection control pressure sensor · moderate
- Oil in the sensor connector · moderate
- Faulty injection pressure regulator · moderate
Less common
- Leak in the high-pressure oil circuit · specialist
- Worn high-pressure oil pump · specialist
- Incorrect oil grade or degraded oil · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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