DTC P2507:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

DTC P2507:00	PCM battery voltage low
DETECTION CONDITION	The PCM monitors the voltage of back-up battery positive terminal If the PCM detects battery positive terminal voltage below 6 V for 5 s when the battery voltage is more than 8 V , the PCM determines that the backup voltage circuit has a malfunction Diagnostic support note This is a continuous monitor (CCM) The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle FREEZE FRAME DATA is available. The DTC is stored in PCM memory.
POSSIBLE CAUSE	Fuse malfunction Battery malfunction PCM connector or terminal malfunction Short to ground in wiring harness between battery positive terminal and PCM terminal 1C Open circuit in wiring harness between battery positive terminal and PCM terminal 1C PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P2507:00

PCM battery voltage low

DETECTION CONDITION

The PCM monitors the voltage of back-up battery positive terminal If the PCM detects battery positive terminal voltage below 6 V for 5 s when the battery voltage is more than 8 V , the PCM determines that the backup voltage circuit has a malfunction

Diagnostic support note

This is a continuous monitor (CCM)
The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle
FREEZE FRAME DATA is available.
The DTC is stored in PCM memory.

POSSIBLE CAUSE

Fuse malfunction
Battery malfunction
PCM connector or terminal malfunction
Short to ground in wiring harness between battery positive terminal and PCM terminal 1C
Open circuit in wiring harness between battery positive terminal and PCM terminal 1C
PCM malfunction

Courtesy of MAZDA MOTORS CORP.