AutoCodes – GMC – P1E08 GMC

P1E08 GMC Code - Hybrid Battery Contactor Status Circuit Low Voltage

Quick Answer

The hybrid powertrain control module monitors the hybrid/EV battery high voltage contactor status and requests contactor function primarily via serial data. Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1E08 GMC indicates Hybrid Battery Contactor Status Circuit Low Voltage.
Common causes: Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 781

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E08 GMC Description

The hybrid powertrain control module monitors the hybrid/EV battery high voltage contactor status and requests contactor function primarily via serial data. In the event of a serial data fault there is a redundant discreet circuit between the two controllers that transmits the hybrid powertrain control module contactor requests to the hybrid powertrain control module 2 via a pulse width modulated (PWM) signal. The hybrid powertrain control module is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

OBDII Code P1E08 GMC - Hybrid Battery Contactor Status Circuit Low Voltage - AutoCodes.com — P1E08 GMC Code - Hybrid Battery Contactor Status Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E08 GMC?

Faulty Power Inverter Module
Power Inverter Module harness is open or shorted
Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1E08 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1E08 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1E08 GMC Code

1. What does the OBDII code P1E08 mean on a GMC vehicle?

P1E08 indicates a "Hybrid Battery Contactor Status Circuit Low Voltage," meaning the hybrid battery contactor circuit is not functioning as expected due to low voltage.

2. What are the common symptoms of code P1E08 in a GMC?

Symptoms may include a check engine light, reduced hybrid system performance, limited vehicle power, or the hybrid system failing to engage.

3. What causes the P1E08 code to appear?

Common causes include a faulty hybrid battery contactor, damaged wiring or connectors in the contactor circuit, a malfunctioning hybrid control module, or low hybrid battery voltage.

4. Can I drive my GMC with a P1E08 code?

Driving with a P1E08 code is not recommended, as it may result in reduced performance, potential damage to the hybrid system, or the vehicle not starting.

5. How do you diagnose a P1E08 code?

Diagnosis involves checking the hybrid battery contactor circuit for low voltage, inspecting wiring and connectors for damage, and testing the hybrid battery and control module.

6. Is the hybrid battery likely to fail if I get a P1E08 code?

While the hybrid battery is not always at fault, a P1E08 code can indicate issues with the battery's contactor or related components. A thorough inspection is necessary to determine the exact cause.

7. What repairs are needed to fix a P1E08 code?

Repairs may include replacing the hybrid battery contactor, repairing or replacing damaged wiring, cleaning or reconnecting connectors, or reprogramming the hybrid control module.

8. How much does it cost to fix a P1E08 code on a GMC?

Repair costs can vary widely but may range from $200 to $1,500 depending on whether it involves wiring repairs, replacing the contactor, or addressing hybrid battery issues.

9. Can a low 12V battery cause a P1E08 code?

A weak or failing 12V auxiliary battery can sometimes cause hybrid system errors, so it is worth testing the 12V battery as part of the diagnosis.

10. Will clearing the code fix the issue?

Clearing the code without addressing the underlying issue will likely result in the code returning. Proper repairs are needed to resolve the problem permanently.