Powertrain, generic (extended)

P2CC7 Generator Inverter Power Supply B Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2CC7 is set when supply B of the generator inverter exceeds its upper limit. Gate inputs of IGBTs tolerate only a limited voltage, so overvoltage on the driver rail puts the switches at risk and the inverter is normally shut down. Ford shows that such rails have a hard ceiling: in its 2019 hybrid OBD summary a motor or generator gate drive supply above 15.08 V counts as a fault, although Ford reports it under a rotor position circuit voltage check, and for the variable voltage converter the window runs from 0.1 V to 15.3 V. No manufacturer documents P2CC7 publicly. A faulty internal regulator or a short between supply rails is most likely. CARB demands circuit monitoring of hybrid components. Siblings: P2CC5, P2CC6; supply A high is P0E11.

Likely causes

Regulator of supply B inside the inverter faulty

Short between two internal supply rails

Overvoltage in the 12 V system from a DC/DC converter fault

Symptoms

Hybrid system warning light and MIL on
Generator blocked, battery no longer charged while driving

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€100–4,500

Time0.5–5 h

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

Parts involved

generator inverter bwiring harnesshybrid control module

Related codes

P2CC5 P2CC6 P0E11

References: fordservicecontent.com, law.cornell.edu, gsi.ext.gm.com.