OBD-II code P2696 indicates that the engine control module (PCM/ECM) has detected a mismatch between the expected fuel injector calibration data and the actual data stored or detected. This typically occurs when fuel injectors from a different model year or engine variant are installed, or when the PCM is replaced without being properly programmed with the correct injector strategy.
Fuel injectors from a different model year or engine variant were installed, causing a conflict with the PCM's stored calibration data.
The PCM was recently replaced or swapped but was not flashed with the correct injector calibration strategy for the specific vehicle.
The injector calibration data stored in the PCM's memory has become corrupted due to a voltage spike or software glitch.
Poor electrical connections or damaged wiring between the injectors and PCM can disrupt data transmission.
In rare cases, the PCM itself has an internal hardware failure preventing it from storing or reading the injector data correctly.
No, it almost always means there is a software or data mismatch rather than a mechanical failure of the injectors themselves.
It is not recommended. Incorrect injector data can cause severe engine running issues, poor fuel economy, and potential catalytic converter damage over time.
Usually not. Drivers are commonly told to replace the PCM for P2696, but this is usually incorrect. The vast majority of the time, the fix is simply reprogramming the existing PCM with the correct injector calibration data or correcting mismatched injectors. PCM replacement should only be considered if the module fails to accept the programming.