DTC P2507:00: Notes

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 (Mode 2)/Snapshot is available. The DTC is stored in PCM memory.
POSSIBLE CAUSE	ENG+B 10 A 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