AutoCodes – GMC – P10E2 2018 GMC Sierra

P10E2 2018 GMC Sierra Code - Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage

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: P10E2 2018 GMC Sierra indicates Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage.
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 207

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 11, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P10E2 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 short to ground for greater than 1 s.

OBDII Code P10E2 2018 GMC Sierra - Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage - AutoCodes.com — P10E2 2018 GMC Sierra Code - Ignition On/Start Circuit Source Bypass Relay Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P10E2 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 P10E2 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P10E2 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 P10E2 2018 GMC Sierra code?

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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 P10E2 2018 GMC Sierra Code

What does the OBDII code P10E2 mean on a 2018 GMC Sierra?

The P10E2 code indicates a problem with the Ignition On/Start Circuit Source Bypass Relay Control Circuit, specifically detecting low voltage.

What are the common symptoms of a P10E2 code?

Symptoms may include difficulty starting the engine, intermittent starting issues, or no response when turning the key or pressing the start button.

What causes the P10E2 code to appear?

Potential causes include a faulty bypass relay, damaged wiring or connectors in the circuit, a weak battery, or an issue with the powertrain control module (PCM).

How is the P10E2 code diagnosed?

A technician will check the battery voltage, inspect the wiring and connectors for damage, test the bypass relay for functionality, and use a scan tool to monitor circuit voltage.

Can a weak battery trigger the P10E2 code?

Yes, a weak or failing battery can result in low voltage to the bypass relay control circuit and trigger the P10E2 code.

How can I fix the P10E2 code on my 2018 GMC Sierra?

Repairs may involve replacing the bypass relay, repairing damaged wiring, cleaning or tightening connections, or replacing the battery if itâ€™s weak or failing.

Is the P10E2 code serious?

Yes, this code can prevent the vehicle from starting, making it important to resolve the issue promptly to avoid being stranded.

Can I drive my GMC Sierra with the P10E2 code active?

Driving may be possible if the vehicle starts, but the issue could worsen and lead to a complete failure to start. Itâ€™s best to address the problem as soon as possible.

Does the P10E2 code require replacing the PCM?

Not always. While a PCM issue is possible, itâ€™s more commonly caused by a relay, wiring, or battery problem. The PCM should only be replaced after confirming itâ€™s faulty.

How much does it cost to fix the P10E2 code?

Repair costs can vary, but typical expenses may include $50â€“$200 for a bypass relay, $100â€“$300 for wiring repairs, and $100â€“$250 for a new battery, plus labor fees.