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Engine-Codes – GMC – P0617 2018 GMC Sierra

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

Quick Answer

The P0617 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Starter Relay Control Circuit High Voltage. Common causes include Faulty starter relay, Short circuit in the wiring, Malfunctioning PCM. 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, Short circuit in the wiring, Malfunctioning PCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0617 2018 GMC Sierra Description

The P0617 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Starter Relay Control Circuit High Voltage. This code indicates that the powertrain control module (PCM) has detected a higher than normal voltage in the starter relay control circuit. The starter relay is responsible for sending power to the starter motor to start the engine. When the PCM detects high voltage in this circuit, it could lead to issues with starting the vehicle or cause the engine to stall unexpectedly.

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

Common Causes of P0617 2018 GMC Sierra

  1. Faulty starter relay
  2. Short circuit in the wiring
  3. Malfunctioning PCM
  4. Defective ignition switch
  5. Corrosion or loose connections in the circuit

Symptoms of P0617 2018 GMC Sierra

  1. Intermittent starting issues
  2. Engine stalling
  3. Failure to start
  4. Check Engine Light illuminated
  5. Reduced engine performance

How to Fix P0617 2018 GMC Sierra

  1. Diagnose the issue by using a multimeter to test the voltage in the starter relay control circuit.
  2. Inspect the wiring for any signs of damage or corrosion. Repair or replace any damaged wiring.
  3. Test the starter relay for proper operation. Replace if necessary.
  4. Check the PCM for any fault codes and perform a reprogramming if needed.
  5. Verify proper operation by starting the vehicle and ensuring the issue is resolved.

Cost to Fix P0617 2018 GMC Sierra

The typical repair costs for addressing a P0617 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of parts for replacing a starter relay or repairing wiring could range from $50 to $200. Labor costs at auto repair shops usually fall between $80 and $150 per hour. Overall, the total repair cost could range from $150 to $500, but it's advisable to check with local repair shops for a more accurate estimate based on your location and vehicle specifics.

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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.

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