AutoCodes – GMC – P0617 2018 GMC Sierra

P0617 2018 GMC Sierra Code - Starter Relay Control Circuit High Voltage

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: P0617 2018 GMC Sierra indicates Starter Relay Control Circuit High Voltage.
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 193

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 P0617 2018 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 P0617 2018 GMC Sierra - Starter Relay Control Circuit High Voltage - AutoCodes.com — P0617 2018 GMC Sierra Code - Starter Relay Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0617 2018 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 P0617 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 P0617 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 P0617 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 P0617 2018 GMC Sierra Code

What does OBDII code P0617 mean for a 2018 GMC Sierra?

Code P0617 indicates a "Starter Relay Control Circuit High Voltage," meaning the ECM has detected an unusually high voltage in the starter relay control circuit.

What are the symptoms of code P0617 in a 2018 GMC Sierra?

Common symptoms include the engine failing to start, intermittent starting issues, or the starter remaining engaged longer than necessary.

What causes code P0617 in a 2018 GMC Sierra?

Potential causes include a faulty starter relay, damaged wiring or connectors in the starter relay circuit, or a malfunctioning ECM.

Can a bad battery cause code P0617 in a GMC Sierra?

Yes, if the battery is overcharging or supplying excessive voltage, it could trigger this code.

How do you diagnose code P0617 in a 2018 GMC Sierra?

Diagnosis typically involves inspecting the starter relay, testing the wiring and connectors for damage, and checking the ECM for faults.

Can I drive a 2018 GMC Sierra with code P0617?

Driving with this code is not recommended, as it may lead to starting issues or potential damage to the starter system.

How do you fix code P0617 in a 2018 GMC Sierra?

Repairs may involve replacing the starter relay, repairing damaged wiring, or reprogramming or replacing the ECM if necessary.

How much does it cost to fix code P0617 in a GMC Sierra?

Repair costs vary depending on the issue but typically range from $150 to $500, including parts and labor.

Can extreme weather trigger code P0617 in a GMC Sierra?

Yes, extreme heat or cold can affect electrical components and connections, potentially leading to voltage irregularities.

Is code P0617 common in GMC Sierra trucks?

While not extremely common, this code can occur in GMC Sierra trucks, especially if there are issues with the starter system or electrical components.