Powertrain, generic · Transmission

P08E9 Drive Motor A Clutch Enable Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Set when the enable line of the drive motor A disconnect clutch actuator reads higher than it should, for example because it is shorted to a supply voltage or the line floats due to an open ground. The module then cannot reliably switch the actuator off or confirm its state. No manufacturer documents this code publicly; the nearest known application is the front electric drive unit of the Corvette E-Ray, whose disconnect clutch actuator and switch GM services as separate parts but describes only under P08ED and a communication code. CARB covers the fault through its output component monitoring. P08E8 is the low-side counterpart, P08E7 the general circuit fault. The system normally keeps the motor uncoupled.

Likely causes

Enable wire shorted to a supply circuit
Open ground or reference circuit of the actuator
Internal fault in the disconnect clutch actuator
Faulty output stage in the drive motor control module

Symptoms

  • Check engine light or hybrid system warning on
  • Electric drive on the affected axle switched off
  • Possible clunk when the system tries to couple the motor

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,500
Time1–4 h

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

Parts involved

drive motor a clutchdrive motor a clutch pawlwiring harness

Related codes

P08E7P08E8P08ED

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.