Powertrain, generic

P0E22 Hybrid/EV Battery Pack Coolant Control Valve C Control Circuit Driver Current/Temperature Too High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0E22 tells that the driver for a third coolant control valve, C, has protected itself against excessive current or heat. No manufacturer documents P0E22 publicly, and none of the reviewed GM, Ford, Stellantis or Mercedes documents uses a valve C at all. Three valves suggest a loop with several branches, for example radiator, air-conditioning chiller and heater, with C switching one of them. Unlike a plain ground short (P0DEB), the overload code catches a load that still conducts but draws too much, so a stiff valve or a shorted turn in its motor is the likely trigger rather than a broken wire. CARB requires that every electronic output of battery thermal management be checked for circuit faults; TI's automotive smart switches show the mechanism: they disconnect once current reaches the limit or the junction nears 150 °C.

Likely causes

Valve C stiff or jammed by deposits
Shorted turn in the valve C actuator motor
Degraded driver stage in the control module

Symptoms

  • Check engine light on
  • One branch of the coolant loop no longer switches
  • Battery overcooled in winter or kept too warm in summer

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time0.5–3 h

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

Parts involved

hv battery pack coolant valve cbms

Related codes

P0E20P0E21P0DE8P0DEBP0DEC

References: law.cornell.edu, ti.com.