DTC P2502 [L3]: Notes

WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.

DTC P2502 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES

DTC P2502	Charging system voltage problem
DETECTION CONDITION	PCM judges generator output voltage is above 17 V or battery voltage is below 11V during engine running. Diagnostic support note This is a continuous monitor (Other). The MIL does not illuminate. FREEZE FRAME DATA is not available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Open circuit between generator terminal B and battery positive terminal Battery malfunction Generator malfunction PCM is poorly connected PCM, generator and/or battery are poorly connected

DTC P2502

Charging system voltage problem

DETECTION CONDITION

PCM judges generator output voltage is above 17 V or battery voltage is below 11V during engine running.

Diagnostic support note

This is a continuous monitor (Other).
The MIL does not illuminate.
FREEZE FRAME DATA is not available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Open circuit between generator terminal B and battery positive terminal
Battery malfunction
Generator malfunction
PCM is poorly connected
PCM, generator and/or battery are poorly connected