P0D65Hybrid/EV Battery Pack Cooling Fan Enable Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0D65 reports a short to ground on the enable output of the battery cooling fan: the line stays low even though the controller is trying to switch the fan on. GM's 2013 eAssist mild hybrid table 13OBDG05C detects it from the output driver's fault flag for the power pack fan, 20 failures in 25 samples at 250 ms, Type B. The later hybrid tables 16OBDG02 to 19OBDG02 test it with the enable commanded on: a voltage under 5.35 V at system voltage above 10.2 V counts, and 16 failures in 20 samples set the code, again Type B with MIL after two trips. A chafed wire touching the body or a shorted input inside the fan are the usual finds. The fan cannot start, so expect higher battery temperatures and possibly reduced electric support. Open circuit is P0D64, short to voltage P0D66.
- What you may notice
- Check engine light or hybrid warning after two trips
- Battery cooling fan never switches on
- Engine runs more and electric assist drops in hot weather
- Likely causes
- LikelyEnable wire chafed and shorted to body ground
- PossibleShorted enable input inside the fan electronics
- RareMoisture or corrosion bridging the enable pin to ground
- RareEnable driver in the battery controller defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.