AutoCodes – GMC – P10E4 2018 GMC Sierra

P10E4 2018 GMC Sierra Code - Ignition On/Start Circuit Source Bypass Relay Control Performance

Quick Answer

The Engine Control Module (ECM) contains a microprocessor used to process input data to control outputs. Common causes include Faulty Engine Control Module Wake-Up Relay, Engine Control Module Wake-Up Relay harness is open or shorted, Engine Control Module Wake-Up Relay 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: P10E4 2018 GMC Sierra indicates Ignition On/Start Circuit Source Bypass Relay Control Performance.
Common causes: Common causes include Faulty Engine Control Module Wake-Up Relay, Engine Control Module Wake-Up Relay harness is open or shorted, Engine Control Module Wake-Up Relay 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 336

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 Aug 11, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P10E4 2018 GMC Sierra Description

The Engine Control Module (ECM) contains a microprocessor used to process input data to control outputs. The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly. Relays are used to control a high-power circuit with a low power signal. The output circuit is switched to the ground to activate the component. The Diagnostic Trouble Code (DTC) will be set when the Control Circuit is out of range for greater than 1 s.

OBDII Code P10E4 2018 GMC Sierra - Ignition On/Start Circuit Source Bypass Relay Control Performance - AutoCodes.com — P10E4 2018 GMC Sierra Code - Ignition On/Start Circuit Source Bypass Relay Control Performance

What does this mean?

What are the Possible Causes of the DTC P10E4 2018 GMC Sierra?

Faulty Engine Control Module Wake-Up Relay
Engine Control Module Wake-Up Relay harness is open or shorted
Engine Control Module Wake-Up Relay circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P10E4 2018 GMC Sierra?

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 does this mean?

Code Tech Notes

There is a Factory Service Bulletin for the following Chevrolet models:
2016-2018 Chevrolet Silverado 1500
2019 Chevrolet Silverado LD
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P10E4 2018 GMC Sierra 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.

Need more information about the P10E4 2018 GMC Sierra code?

Need more information on how to fix the P10E4 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P10E4 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P10E4 2018 GMC Sierra Code

What does the OBDII code P10E4 mean on a 2018 GMC Sierra?

P10E4 refers to an issue with the Ignition On/Start Circuit Source Bypass Relay Control Performance, indicating the relay may not be functioning as expected.

What are common symptoms of the P10E4 code in a 2018 GMC Sierra?

Symptoms may include difficulty starting the engine, extended cranking time, or the engine failing to start altogether.

What causes the P10E4 code to appear?

Common causes include a faulty bypass relay, damaged wiring, loose electrical connections, or a malfunctioning ignition switch.

Can a P10E4 code cause the engine to not start?

Yes, if the bypass relay or related components fail, it can prevent the engine from starting properly.

How do you diagnose the P10E4 code?

Diagnosis typically involves checking the bypass relay, inspecting the wiring and connections, and using a scan tool to monitor relay control circuit performance.

Is it safe to drive with the P10E4 code active?

Driving may be possible, but the vehicle could experience starting issues. It's best to address the problem promptly to avoid being stranded.

How is the P10E4 code fixed?

Repairs may involve replacing the bypass relay, repairing damaged wiring, securing loose connections, or replacing the ignition switch if needed.

Can a dead battery trigger the P10E4 code?

A weak or dead battery can cause electrical issues but is not a direct cause of the P10E4 code. However, it should still be checked during diagnosis.

Does the P10E4 code require professional repair?

While experienced DIYers may handle basic checks, diagnosing and repairing ignition circuitry often requires professional expertise and specialized tools.

How much does it cost to fix the P10E4 code on a 2018 GMC Sierra?

Repair costs vary but typically range between $100 and $300, depending on whether the issue is with the relay, wiring, or ignition system.