Powertrain, generic (extended)

P2DC0 Battery Charger B Coupler Lock Position Sensor Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2DC0 describes lock feedback at the charger B inlet that jumps or drops out for short moments instead of failing steadily. Because the lock state is a release condition for charging, a flickering signal can end a session or stop it from starting even though the plug is held properly. No manufacturer documents P2DC0 publicly. GM's patent US8936482B2 names the consequence of an unconfirmed lock: fast charging is prohibited. As a model on the A side, Mercedes traced a lock position sensor fault (P0D9F00) on the smart electric drive's 22 kW charger to loose low-voltage plugs at that charger (LI54.10-P-067823), with complaints tied to cold or warm components. Worn terminals, a chafed wire at the inlet and water ingress are typical. Steady faults are P2DBC to P2DBF.

Likely causes

Loose low-voltage plug at the lock actuator or charger
Sensor wire chafed near the charging inlet
Water ingress into the inlet or actuator connector

Symptoms

  • Charging at inlet B stops or fails to start sporadically
  • Fault appears only at certain temperatures

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–4 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

P2DBCP2DBDP2DBEP2DBFP0DA2

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