2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P2504: Notes

DTC P2504 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2504 Battery overcharge
DETECTION CONDITION 
  • The PCM determines that the generator output voltage is 18.5 V or above,  or the battery voltage is 16.0 V or above  when the engine is running.

Diagnostic support note 

  • This is a continuous monitor (other).
  • The MIL does not illuminate.
  • PENDING CODE is available if the PCM detects the above malfunction condition.
  • FREEZE FRAME DATA is not available.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • Generator malfunction
  • Connector or terminal malfunction
  • Short to power circuit between generator connector terminal D and PCM terminal 36
  • PCM malfunction
G04327954Courtesy of MAZDA MOTORS CORP.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.