OBD-II code P0295 indicates that the engine control module (PCM/ECM) has detected an abnormally high voltage in the fuel injector circuit for cylinder 12. This typically suggests an electrical issue, such as a short to power or an open circuit, rather than a mechanical injector failure.
The injector itself may have an internal short to power or an open winding, causing excessive voltage in the circuit.
Wiring between the PCM and injector may be shorted to power, grounded, or broken due to wear, heat, or physical damage.
Corrosion, loose pins, or bent terminals in the injector connector or PCM harness can cause high resistance or intermittent high-voltage readings.
While rare, the PCM’s internal driver circuit for the injector could fail, causing incorrect voltage signals. This is uncommon and should only be considered after all other causes are ruled out.
No. While the PCM controls the injector circuit, it is rarely the root cause of P0295. Most cases stem from wiring issues, connector problems, or a faulty injector. PCM failure should only be suspected after all other possibilities are exhausted.
Driving with this code may cause engine misfires, reduced performance, or potential catalytic converter damage due to unburned fuel. It’s best to diagnose and repair the issue promptly.
P0295 is an electrical code, not a misfire code. The PCM may detect the high-voltage condition before a misfire occurs, or the misfire may be intermittent and not logged yet.
Not necessarily. The issue could be in the wiring, connectors, or PCM. Always perform electrical tests to isolate the fault before replacing components.