Powertrain, generic · Hybrid propulsion

P0D9A Battery Charger Coupler Temperature Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

P0D9A covers a coupler temperature signal that is electrically valid but does not make sense, for example a rise that the charging current cannot explain or a value that disagrees with the rest of the system. GM's preliminary information PIT5904 lists it, with P298C and P0E5F, for the 2022 GMC Hummer EV and BrightDrop EV600: the MIL comes on and charging fails or aborts, often at heavily used public or dealer stations. GM suspects software or oversized and damaged terminals in the cable plug, advises clearing codes and trying another station, and notes that the test only re-runs after about 10 minutes of driving above 2 mph. Mercedes stores it as P0D9A97 (sensor malfunction) in the smart's 22 kW charger. Unlike P0D99, a worn station plug can trigger it on a healthy car; true overheating is P0E5F.

Likely causes

Oversized or damaged terminals in the charging station plug (GM)
Charging software calibration, update pending or available (GM)
Raised contact resistance at the vehicle inlet pins
Temperature element drifting out of its characteristic

Symptoms

  • MIL on (GM)
  • Charging fails or stops, often at busy public stations
  • Code returns only after a drive of about 10 minutes (GM)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,200
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

charge port temperature sensorwiring harnesson board charger

Related codes

P0D99P0D9BP0D9CP0D9DP0E5F

References: static.nhtsa.gov, static.nhtsa.gov, patents.google.com.