The P2674 code indicates that the engine control module (ECM) has not completed the required learning or calibration process for the fuel injection pump. This typically occurs after a pump replacement or an ECM reset where the specific flow characteristics of the pump have not been programmed.
The fuel injection pump was replaced, but the required electronic calibration process was not performed.
The engine control module was replaced or cleared, erasing the previous pump calibration data.
A calibration attempt was started but interrupted by a loss of power or a system error.
The pump is mechanically unable to reach the parameters required to complete the calibration process.
The control module is unable to store or process the calibration data due to internal failure.
Not necessarily. It often means the computer simply lacks the software calibration data needed to operate the pump correctly.
Clearing the code may turn off the warning light, but it will not perform the calibration, which may result in poor engine performance.
It is very unlikely. P2674 is almost always a procedural issue requiring a calibration step rather than a hardware failure of the control module.