Powertrain, generic · Transmission

P08E8 Drive Motor A Clutch Enable Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Set when the voltage on the enable line of the drive motor A disconnect clutch actuator stays below the expected range, usually because the wire or the actuator input is shorted to ground. The control module can then no longer switch the actuator on, so the clutch cannot be engaged or released on command. No manufacturer documents this code publicly; the comparable hardware is the front drive unit of the Corvette E-Ray with its disconnect clutch actuator, pawl and switch, for which GM publishes only P08ED and an actuator communication fault. CARB requires such circuit monitoring. P08E7 is the general circuit fault, P08E9 the high-side counterpart. Electric drive on that axle is typically disabled.

Likely causes

Enable wire chafed and shorted to ground
Internal short at the actuator enable input
Water ingress in the actuator connector
Faulty output stage in the drive motor control module

Symptoms

  • Check engine light or hybrid system warning on
  • Electric drive axle stays disconnected
  • Reduced performance, no electric launch or all-wheel drive

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

P08E7P08E9P08ED

References: law.cornell.edu, static.nhtsa.gov, gm-techlink.com.