Powertrain, generic (extended)

P2C6E Drive Motor A Phase Y Current High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2C6E reports that too much current flows in the Y phase of drive motor A, which sits in the machine's second winding set. No manufacturer documents P2C6E publicly. A Hyundai bulletin shows what usually lies behind a phase overcurrent: on the 2017 Ioniq Hybrid, coolant leaking inside the traction motor set the high codes of phases U, V and W (P0A5F, P0A62, P0A65), often with the isolation fault P0AA6. Dealers ran an insulation breakdown test and replaced the motor if it failed, and drivers noticed weak acceleration and no air conditioning. The same applies to Y: moisture, coolant or damaged insulation lets current bypass the intended path. A shorted inverter switch or a sensor reading too high are the other suspects. P2C6D is the low side, P2C6B and P2C71 are X and Z.

Likely causes

Coolant or moisture inside the motor degrading winding insulation
Short between phase Y and another phase or the stator core
Shorted power switch in the Y leg of the inverter
Phase Y current sensor reading too high

Symptoms

  • Hybrid warning and MIL, often with an isolation fault code
  • Weak acceleration or electric drive switched off
  • Electric air conditioning compressor disabled

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€400–7,000
Time2–10 h

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

Parts involved

drive motor adrive motor a phase yinverter

Related codes

P2C6CP2C6DP2C6BP2C71P0A62P0AA6

References: static.nhtsa.gov, patents.google.com, law.cornell.edu.