SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3]DTC P2504NOTES
2010 Mazda 5 Sport, 2.3 L, Standard

DTC P2504: Notes

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes
DTC P2504 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES

DTC P2504 Charging system voltage high
DETECTION CONDITION 
  • PCM judges generator output voltage is above 18.5 V  or battery voltage is above 16 V  for 5s during engine running.

Diagnostic support note 
  • This is a continuous monitor (Other).
  • The MIL does not illuminate.
  • FREEZE FRAME DATA (Mode 2/Mode12) is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Generator is poorly connected
  • Generator malfunction
  • PCM is poorly connected
  • Short to power circuit between generator connector terminal D and PCM connector terminal 2AA
  • PCM malfunction
G06760525Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.