Powertrain, generic (extended)

P2CC5 Generator Inverter Power Supply B Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2CC5 concerns supply B inside the inverter that drives a hybrid's generator (motor-generator), typically a low-voltage rail feeding the gate drivers of the power transistors. Which supply gets the letter B is defined by the manufacturer; a second inverter channel or second generator would also fit. The code covers a missing supply or an interrupted feed. No manufacturer documents P2CC5 publicly. GM's 2019 hybrid tables show the principle with P0C0B for the drive motor A inverter: the IGBT module flags a bias fault when its supply dips below a threshold, and 0.168 s of failures within a 0.2 s window set a Type A code. CARB requires circuit monitoring of hybrid components. Without gate supply the generator cannot be switched at all. Supply A: P0E0F.

Likely causes

Supply B for the gate drivers failed inside the inverter
12 V feed, fuse or connector of the inverter interrupted
Poor ground connection of the inverter control electronics

Symptoms

  • Hybrid system warning light and MIL on
  • Generator out of operation, vehicle may not become ready to drive

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

P2CC6P2CC7P0E0FP0C0B

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