DTC P025B; Pcm: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC P025B:00	Fuel pump control module circuit range/performance problem
DETECTION CONDITION	When any of the following conditions is met: The temperature in the fuel pump control module is too high. Output duty ratio signal received from PCM is in error. Temperature detection thermistor in fuel pump control module is malfunctioning. Output signal from fuel pump control module is erratic (noise overlap). Diagnostic support note This is a continuous monitor (CCM). The check engine light does not illuminate. FREEZE FRAME DATA (Mode 2) is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Stops fuel pump control. (If overheating is detected in fuel pump control module)
POSSIBLE CAUSE	Fuel pump control module connector or terminals malfunction PCM connector or terminals malfunction Short to ground in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE Short to power supply in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE Open circuit in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE Fuel pump control module malfunction PCM malfunction