Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC 31: Engine Retard Command (PFINH) Signal ('99-00 models)
2001 Honda Odyssey LXSECTION DTC 31: Engine Retard Command (PFINH) Signal ('99-00 models)
NOTE:
If the MIL or ABS indicator is ON, troubleshoot the PGM-FI or ABS first.
- Disconnect PCM connector E (12P) and the ABS/TCS control unit connector B (16P).
- Check for continuity between the PCM connector E (12P) terminal No. 3 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
- YES - Repair short to body ground in the wire between the PCM and the ABS/TCS control unit.
- NO - Go to step 3.
- Connect the PCM connector E (12P).
- Start the engine.
- Measure the voltage between the PCM connector E (12P) terminal No. 3 and body ground.NOTE: Use the 10 V range or similar range in an analog tester.
RENDER: 1.0x
NO RELATED
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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.