Powertrain, generic

P0E6A Battery Charging System Precharge Contactor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0E6A is the general code for the precharge contactor of the battery charging system. Before the main charging contactors close, this small contactor feeds the charger side through a resistor so the voltage can rise gently towards pack voltage; without it the main contacts would arc. The code collects faults of this branch that fit none of the more specific siblings. No manufacturer documents P0E6A publicly. GM's 2019 hybrid tables watch the same function under their own codes: the charger bus must reach 95 to 105 percent of pack voltage within 0.7 seconds (P0D26), and battery current above 3 A for about 87 ms during precharge sets P3061, both Type A. CARB requires charger malfunctions that block charging to be detected. Stuck faults are P0E6B and P0E6C, coil circuit faults P0E6D to P0E70.

Likely causes

Precharge resistor burnt open or overheated
Worn or sluggish precharge contactor in the charging path
Charger-side voltage measurement reading wrongly

Symptoms

  • Charging session aborts right at the start
  • Charging not possible, driving usually still possible

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–2,000
Time1–5 h

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

Parts involved

precharge contactorprecharge resistorbms

Related codes

P0E6BP0E6CP0E6DP0D26P0AE1

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