Powertrain, generic (extended)

P2C6A Drive Motor A Phase X Current Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2C6A means that too little current is seen in phase X of drive motor A while the inverter is driving it, which typically points to an open phase or a dead sensor. No carmaker documents the code publicly. GM's U/V/W counterpart shows how such a check works: in the 2016 Volt, the motor control processor samples each phase while the rotor sits within 30 degrees of that phase axis, with the inverter in normal PWM above 50 V and more than 900 A2 commanded; a peak below 9 A for 0.4 s within 0.6 s sets the code as Type A, MIL after one trip. In a dual-winding motor with a second X/Y/Z set, as in a Mitsubishi Electric patent, the same test would apply to phase X. P2C69 is the general X code, P2C6B the high side, P2C6D and P2C70 the low faults of Y and Z.

Likely causes

Phase X lead or terminal open or high-resistance between inverter and motor
Phase X current sensor reading near zero (sensor or its supply failed)
Switching leg for phase X in the inverter not conducting
Open winding of phase X inside drive motor A

Symptoms

  • Hybrid or drive system warning and MIL on
  • Noticeably weaker or jerky electric drive, or drive disabled

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–6,000
Time1.5–8 h

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

Parts involved

drive motor adrive motor a phase xinverter

Related codes

P2C69P2C6BP2C6DP2C70P0A5E

References: gsi.ext.gm.com, patents.google.com, law.cornell.edu.