Powertrain, generic · Transmission

P08EB Drive Motor A Clutch Pawl Position Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Set when the pawl position signal of the drive motor A disconnect clutch stays below its valid range, which points to a short to ground in the signal wire, a missing sensor supply or a sensor that has failed low. The module then cannot tell whether the pawl has engaged. No manufacturer documents this code publicly; the matching hardware is the disconnect clutch switch on the front drive unit of the Corvette E-Ray, which GM links only to P08ED, and supplier patents describe such position sensing on pawl or strut clutches. CARB requires out-of-range checks on these inputs. P08EC is the high-side fault, P08EA the general circuit fault. The system typically keeps the motor uncoupled and lights a warning.

Likely causes

Position signal wire shorted to ground
Missing supply voltage to the position switch
Position switch or sensor failed low

Symptoms

  • Check engine light or hybrid system warning on
  • Electric drive axle disabled
  • Hybrid modes with electric assist not selectable

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

P08EAP08ECP08ED

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