Powertrain, generic · Transmission

P08EA Drive Motor A Clutch Pawl Position Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Concerns the sensor or switch that reports where the pawl of the drive motor A disconnect clutch sits, i.e. whether the form-locking clutch is engaged or released. The code sets when the control module finds an electrical fault in that signal circuit, such as an open line or a signal outside its valid states. No manufacturer documents this code publicly. GM fits a drive motor disconnect clutch switch to the front drive unit of the Corvette E-Ray and blames it for P08ED; pawl clutches with dedicated position sensors are described in supplier patents such as one from Means Industries. CARB requires input circuit checks. P08EB and P08EC are the low and high variants, P08ED the plausibility fault. Electric drive on that axle is usually inhibited.

Likely causes

Faulty disconnect clutch position switch or sensor
Open signal or reference wire to the position switch
Corroded or loose connector at the drive unit
Faulty input stage in the drive motor control module

Symptoms

  • Check engine light or hybrid system warning on
  • Electric drive or all-wheel drive unavailable
  • Reduced acceleration in hybrid modes

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,200
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

P08EBP08ECP08EDP08E7

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