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P0690 2017 GMC Sierra Code - Electronic Control Module Power Relay Sense Circuit High

Quick Answer

The P0690 code in a 2017 GMC Sierra indicates a problem with the Electronic Control Module (ECM) power relay sense circuit being too high. Common causes include Corroded or damaged wiring in the power relay sense circuit, Faulty connectors or poor electrical connections, Defective ECM power relay. 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
P0690 2017 GMC Sierra indicates Electronic Control Module Power Relay Sense Circuit High.
Common causes
Common causes include Corroded or damaged wiring in the power relay sense circuit, Faulty connectors or poor electrical connections, Defective ECM power relay.
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 18, 2024
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Code P0690 2017 GMC Sierra Description

The P0690 code in a 2017 GMC Sierra indicates a problem with the Electronic Control Module (ECM) power relay sense circuit being too high. The ECM is a crucial component of the vehicle's engine management system, responsible for controlling various functions such as fuel injection, ignition timing, and emissions. The power relay sense circuit is designed to monitor the voltage level of the ECM power relay, ensuring that it is within the specified range for proper operation.

OBDII Code P0690 2017 GMC Sierra - Electronic Control Module Power Relay Sense Circuit High
P0690 2017 GMC Sierra Code - Electronic Control Module Power Relay Sense Circuit High

Common Causes of P0690 2017 GMC Sierra

  1. Corroded or damaged wiring in the power relay sense circuit
  2. Faulty connectors or poor electrical connections
  3. Defective ECM power relay
  4. Malfunctioning Electronic Control Module (ECM)
  5. Electrical system issues such as a short circuit or voltage spikes

Symptoms of P0690 2017 GMC Sierra

  1. Check Engine Light illuminated
  2. Engine running rough or misfiring
  3. Reduced fuel efficiency
  4. Difficulty starting the vehicle
  5. Stalling or hesitation during acceleration

How to Fix P0690 2017 GMC Sierra

  1. Begin by using a diagnostic scanner to retrieve the trouble codes and identify the specific issue causing the P0690 code.
  2. Inspect the power relay sense circuit for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring or connectors.
  3. Test the ECM power relay to ensure it is functioning correctly. Replace the relay if necessary.
  4. If the problem persists, perform a thorough inspection of the ECM and its connections. Replace the ECM if it is found to be faulty.
  5. Clear the trouble codes from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0690 2017 GMC Sierra

The typical repair costs for addressing the P0690 code in a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple sources to ensure a fair price. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

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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 P0690 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P0690 in a 2017 GMC Sierra?

- Common symptoms include the Check Engine light illuminating, engine stalling, poor vehicle performance, or difficulty starting the vehicle.

2. What does the OBDII code P0690 for Electronic Control Module Power Relay Sense Circuit High mean in a 2017 GMC Sierra?

- This code indicates a high voltage condition in the power relay sense circuit of the Electronic Control Module (ECM) in the vehicle.

3. What are the possible causes of OBDII code P0690 in a 2017 GMC Sierra?

- The code P0690 can be triggered by issues such as a faulty power relay, damaged wiring or connectors in the ECM circuit, or a malfunctioning ECM itself.

4. How can I diagnose the OBDII code P0690 in my 2017 GMC Sierra?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the power relay and related circuits for faults, and inspecting the ECM for any signs of damage.

5. Can I still drive my 2017 GMC Sierra with OBDII code P0690 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to potential engine performance issues or stalling, risking safety and further damage.

6. How can I repair OBDII code P0690 in my 2017 GMC Sierra?

- Repairing this code may involve replacing a faulty power relay, repairing damaged wiring or connectors, or replacing the ECM if diagnosed as the root cause of the issue.

7. Is it possible to reset the OBDII code P0690 in a 2017 GMC Sierra without fixing the underlying issue?

- While clearing the code with a diagnostic scanner is possible, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

8. Are there any DIY tips for troubleshooting OBDII code P0690 in a 2017 GMC Sierra?

- DIY tips may include visually inspecting the power relay and related wiring for any visible damage, checking for loose connections, and ensuring proper ECM function.

9. How much does it cost to fix OBDII code P0690 in a 2017 GMC Sierra at a repair shop?

- The cost of fixing this code can vary depending on the specific cause of the issue, but it may include parts and labor costs ranging from $150 to $500 or more.

10. Can a mechanic help me with diagnosing and repairing OBDII code P0690 in my 2017 GMC Sierra?

- Yes, a qualified mechanic or automotive technician can assist in diagnosing and repairing OBDII code P0690 to ensure proper troubleshooting and resolution of the issue.

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