How severe is this DTC?
The conditions contributing to a stored P2258 code could damage the secondary air injection pump. This is why this code should be classified as severe.
What are some of the symptoms of the code?
Symptoms of a P2258 fault code may include:
- Secondary air injection system disabled
- No obvious symptoms may be present
- Unusual noises from the engine compartment
What are some common causes of the code?
Causes of this code may include:
- Blown fuse(s)
- Open or shorted control circuits
- Open or shorted pump motor
- PCM programming error or faulty PCM
What are the troubleshooting steps for P2258?
You will need a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable source of vehicle information to accurately diagnose a P2258 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 P2258 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 diagrams, 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 the secondary air injection system control voltage at the appropriate connector pin. 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.
Vehicles in extremely cold climate conditions often experience secondary air injection pump failure due to frozen condensation