How severe is this DTC?
Conditions that contribute to a stored P2289 code could lead to catastrophic engine damage. This is why this code must be classified as severe.
What are some of the symptoms of the code?
Symptoms of a P2289 fault code may include:
- No start condition
- Excessive exhaust smoke
- Unusual noises from the engine compartment
What are some common causes of the code?
Causes
of this code may include:
- Faulty high-pressure injection pressure sensor
- Open or shorted control circuits
- Low oil level
- Low oil pressure
What are the troubleshooting steps for P2289?
Start by ensuring the engine is filled with oil to the proper level and that no oil pressure or oil level warning lights are illuminated. If this is the case, a manual oil pressure test may be necessary. Engine timing components are affected by engine oil pressure. High-pressure injection operation is driven using engine timing components. If engine oil pressure is low, injection timing can be negatively affected.
You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2289 code.
You can save time by searching for Technical Service Bulletins (TSBs) that match the stored code, the vehicle (year, make, model, and engine), and the symptoms presented. This information can be found in your vehicle information source. If you find the right TSB, it might provide a quick solution to your diagnosis.
After connecting the scanner to the vehicle’s diagnostic port and retrieving all stored codes and relevant freeze frame data, note the information (in case the code turns out to be intermittent). After that, clear the codes and test the vehicle until one of two things happens; the code is restored or the PCM enters readiness mode.
The code may be more difficult to diagnose if the PCM enters readiness mode at this point, as the code is intermittent. The condition that caused the P2289 to be stored may need to worsen before an accurate diagnosis can be made. If the code is restored, proceed with the diagnosis.
You can obtain connector face views, connector pinout charts, component location diagrams, wiring diagrams, and diagnostic flowcharts (related to the code and vehicle in question) using your vehicle information source.
Perform a visual inspection of the associated wiring and connectors. Repair or replace wiring that is cut, burned, or damaged.
Use the DVOM to test voltage and ground circuits at the injection system pressure sensors. If no voltage is detected, check the system fuses. Replace blown or faulty fuses as needed.
If voltage is detected, test the corresponding circuit at the PCM connector. If no voltage is detected there, suspect an open circuit between the sensor in question and the PCM. If voltage is found there, suspect a PCM programming error or faulty PCM.
Test the injection pressure sensor with the DVOM. If it does not meet manufacturer specifications, consider it faulty.
Although this type of code is listed on some gasoline applications, I have seen it exclusively in high-pressure diesel injection applications where an engine timing issue had occurred.