Powertrain, generic (extended)

P2DBD Battery Charger B Coupler Lock Position Sensor Circuit Range/Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2DBD is the plausibility fault of the coupler lock feedback on charger B: the signal is electrically valid yet does not fit what the lock is doing, for example a travel that is too short after a lock command, or longer than the pin could ever move with a plug inserted. No manufacturer documents P2DBD publicly. GM's patent US8936482B2 uses that second case to spot a broken or missing pin, since the computed travel then passes the locked end stop. Mercedes lists the A-side code P0D9F00, a malfunctioning position sensor of the charging cable lock, for the 22 kW charger of the smart electric drive (LI54.10-P-067823); loose low-voltage contacts at the charger were behind it. While the lock state is doubtful, charging is usually refused. Hard low or high faults are P2DBE and P2DBF.

Likely causes

Lock pin broken off or missing, so the measured travel is implausible
Lock mechanism sticking or jammed by dirt or ice
Loose low-voltage contacts at the charger or actuator

Symptoms

  • Charging at inlet B refused
  • Plug cannot be locked or released normally

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

battery charger b coupler lock sensorcharge port lock actuatorwiring harness

Related codes

P2DBCP2DBEP2DBFP2DC0P0D9F

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