AutoCodes – GMC – P0615 2014 GMC Sierra

P0615 2014 GMC Sierra Code - Start Signal Circuit

Quick Answer

When the ignition switch is placed in the START position, a discrete signal is supplied to the Body Control Module (BCM) notifying it that the ignition is in the START position. Common causes include Faulty Starter Relay, Starter Relay harness is open or shorted, Starter 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: P0615 2014 GMC Sierra indicates Start Signal Circuit.
Common causes: Common causes include Faulty Starter Relay, Starter Relay harness is open or shorted, Starter 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 293

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 Jul 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0615 2014 GMC Sierra Description

When the ignition switch is placed in the START position, a discrete signal is supplied to the Body Control Module (BCM) notifying it that the ignition is in the START position. The BCM then sends a message to the Engine Control Module (ECM) that a crank has been requested. The ECM then verifies that the clutch pedal is depressed, or the transmission is in Park/Neutral. If it is, the ECM then supplies 12 V to the control circuit of the starter relay. When this occurs, battery voltage is supplied through the switch of the starter relay to the starter solenoid. The Diagnostic Trouble Code (DTC) will be set when the ECM detects improper voltage on the control circuit of the starter relay.

OBDII Code P0615 2014 GMC Sierra - Start Signal Circuit - AutoCodes.com — P0615 2014 GMC Sierra Code - Start Signal Circuit

What does this mean?

What are the Possible Causes of the DTC P0615 2014 GMC Sierra?

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

How to Fix the DTC P0615 2014 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 P0615 2014 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 P0615 2014 GMC Sierra code?

Need more information on how to fix the P0615 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0615 2014 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 P0615 2014 GMC Sierra Code

1. What does the OBDII code P0615 on a 2014 GMC Sierra mean?

The OBDII code P0615 on a 2014 GMC Sierra indicates a malfunction in the Start Signal Circuit of the vehicle.

2. What are the common symptoms of OBDII code P0615 in a 2014 GMC Sierra?

Common symptoms of OBDII code P0615 in a 2014 GMC Sierra include difficulty starting the engine, intermittent starting issues, and in some cases, the engine may not start at all.

3. What are the possible causes of OBDII code P0615 in a 2014 GMC Sierra?

Possible causes of OBDII code P0615 in a 2014 GMC Sierra include a faulty ignition switch, damaged wiring or connectors in the start signal circuit, or a defective starter relay.

4. How can I diagnose the OBDII code P0615 in my 2014 GMC Sierra?

To diagnose the OBDII code P0615 in a 2014 GMC Sierra, you can use a scan tool to retrieve the specific trouble code, inspect the wiring and connectors in the start signal circuit, and test the ignition switch and starter relay for proper functionality.

5. Can I still drive my 2014 GMC Sierra with OBDII code P0615?

It is not recommended to drive your 2014 GMC Sierra with OBDII code P0615, as it may lead to unexpected starting issues or engine failure. It is best to address the underlying problem promptly.

6. How do I repair OBDII code P0615 in my 2014 GMC Sierra?

To repair OBDII code P0615 in a 2014 GMC Sierra, you may need to replace the faulty ignition switch, repair or replace damaged wiring or connectors, or replace the defective starter relay as needed.

7. Is it safe to reset the OBDII code P0615 in my 2014 GMC Sierra using a scan tool?

While resetting the OBDII code P0615 using a scan tool may temporarily clear the fault code, it is crucial to address the underlying issue causing the code to prevent further problems with the vehicle's starting system.

8. Can a DIY enthusiast fix OBDII code P0615 in a 2014 GMC Sierra?

Depending on your level of experience and access to tools, a DIY enthusiast may be able to diagnose and repair OBDII code P0615 in a 2014 GMC Sierra by following the manufacturer's repair manual or seeking guidance from automotive forums.

9. How much does it cost to repair OBDII code P0615 in a 2014 GMC Sierra at a mechanic?

The cost of repairing OBDII code P0615 in a 2014 GMC Sierra at a mechanic can vary depending on the specific cause of the issue, but it may range from $100 to $400 or more, including parts and labor.

10. Will OBDII code P0615 in my 2014 GMC Sierra affect fuel efficiency?

While OBDII code P0615 itself may not directly impact fuel efficiency, unresolved starting issues associated with the code can lead to inefficient engine operation, potentially affecting fuel efficiency over time.