P2288 Injector Control Pressure Too High

Severity of Code P2288:
This code is classified as severe because associated failures can cause catastrophic engine damage.

Common Symptoms:

• Engine does not start
• Excessive exhaust smoke
• Abnormal noises from the engine compartment

Potential Causes:

1. Faulty high-pressure injection pressure sensor.
2. Open or shorted control circuits.
3. Insufficient engine oil level.
4. Engine oil pressure too low.

Troubleshooting Procedure:

1. Preliminary Check:
   • Check and correct the engine oil level.
   • Verify that no oil warning light (pressure or level) is illuminated. If present, perform a manual oil pressure test.
   • (Note: Oil pressure is crucial for engine timing, which controls high-pressure injection. Low pressure disrupts this timing).
2. Required Equipment:
   • Diagnostic scanner.
   • Digital multimeter (DVOM).
   • Reliable technical documentation specific to the vehicle.
3. Prior Research (Time-Saving):
   • Consult Technical Service Bulletins (TSBs) corresponding to code P2288, the vehicle (year, make, model, engine), and observed symptoms.
4. Initial Diagnosis:
   • Connect the scanner, retrieve all fault codes and freeze frame data. Record them.
   • Clear the codes and perform a road test until:
     • Code P2288 is restored: Continue diagnosis.
     • PCM enters readiness mode: The code is intermittent. The fault likely needs to worsen for precise diagnosis.
5. Electrical Inspection and Testing:
   • Use technical documentation to identify schematics, connectors, and component locations involved.
   • Visually inspect wiring and connectors associated with the high-pressure injection system. Repair or replace any cut, burnt, or damaged wiring.
   • Test voltage and ground at the injection pressure sensor terminals with the DVOM:
     • No voltage: Check system fuses. Replace faulty fuses.
     • Voltage present: Test the circuit at the PCM connector.
       • No voltage at PCM: Suspect an open circuit between the sensor and PCM.
       • Voltage present at PCM: Suspect programming error or faulty PCM.
6. Component Testing:
   • Test the high-pressure injection pressure sensor with the DVOM. If it does not meet manufacturer specifications, replace it.

Important Note:
Although theoretically possible on some gasoline engines, code P2288 is most commonly encountered on high-pressure injection diesel engines, typically related to an engine timing issue.