Powertrain, generic · Hybrid propulsion

P0D9F Battery Charger A Coupler Lock Position Sensor Circuit Range/Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D9F covers a lock position signal that is electrically in range but does not fit the situation: the pin is reported in a position the actuator was not told to reach, or it gets there too late. The sensing principle in GM patent US8936482B2 works on pin travel, so a jammed or worn mechanism shows up here as well as a drifting sensor. Mercedes names the code for the third-generation smart electric drive with 22 kW charger built before 25 March 2013. Bulletin LI54.10-P-067823 lists P0D9F00 (position sensor of the cable lock faulty) among sporadic interlock faults: the car will not start and shows a plugged-in cable, or the battery will not charge. The cause was loose low-voltage contacts on the charger; technicians gently move each plug and wait up to 5 s for charging to begin. Hard circuit faults are P0D9E, P0DA0 and P0DA1.

Likely causes

Loose low-voltage contacts at the 22 kW on-board charger (smart)
Lock mechanism sluggish from ice, dirt or a worn gear train
Position sensor in the actuator drifting or misaligned

Symptoms

  • Vehicle will not start and reports a connected charging cable (smart)
  • High-voltage battery does not charge
  • Fault may appear only at the start or end of charging, with cold or warm parts

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–600
Time0.3–2 h

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

Parts involved

charge port lock actuatorwiring harnesson board charger

Related codes

P0D9EP0DA0P0DA1P0DA2P0D98

References: static.nhtsa.gov, patents.google.com, law.cornell.edu.