Powertrain, generic (extended)

P2DCE Control Pilot Charging Switch B Circuit/Open

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

P2DCE reports an open or otherwise faulty control circuit of charging switch B, a vehicle-side switch on the control pilot line. Under SAE J1772 the car first loads the pilot with about 2.74 kΩ, pulling the 12 V supplied by the station down to roughly 9 V; closing a charging switch puts another 1.3 kΩ in parallel, the level falls to about 6 V and the station energises the cable. With the circuit of switch B interrupted, the module cannot place this request through it. Which hardware the letter B stands for, such as a second charge inlet or a redundant path, is not published, and no manufacturer documents P2DCE. CARB asks plug-in hybrids to detect charger faults that stop or limit charging. Switch A counterpart: P0CF8. Expect a car that the station recognises but that does not charge.

Likely causes

Broken wire or pushed-back pin in the switch B circuit

Switch or its driver inside the charging module open

Corroded contacts at the charge inlet or module connector

Symptoms

Station detects the car but charging never starts
Charging fault message in the instrument cluster

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€80–1,200

Time0.5–3 h

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

Parts involved

control pilot switch bwiring harnesson board charger

References: en.wikipedia.org, law.cornell.edu.