P08E9: Drive Motor A Clutch Enable Circuit High

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.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: hard
It can trigger limp mode.
It affects emissions.

What each character of P08E9 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
8: Transmission
E9: Specific fault in that system

Frequently asked questions

Can I keep driving with code P08E9?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P08E9?

The most common causes are: enable wire shorted to a supply circuit; open ground or reference circuit of the actuator; internal fault in the disconnect clutch actuator.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.