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P0687 2016 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit High

Quick Answer

The OBD-II trouble code P0687 for a 2016 Chevrolet Silverado indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit being too high. Common causes include Faulty ECM power relay, Wiring issues in the power relay circuit, Malfunctioning ECM. 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
P0687 2016 Chevrolet Silverado indicates Engine Control Module Power Relay Control Circuit High.
Common causes
Common causes include Faulty ECM power relay, Wiring issues in the power relay circuit, Malfunctioning ECM.
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 15, 2024
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Code P0687 2016 Chevrolet Silverado Description

The OBD-II trouble code P0687 for a 2016 Chevrolet Silverado indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit being too high. The ECM power relay is responsible for supplying power to the engine control module, which is a crucial component in controlling various engine functions. When the power relay control circuit is reading high, it means that the voltage levels in the circuit are above the specified range, potentially causing issues with the ECM's operation.

OBDII Code P0687 2016 Chevrolet Silverado - Engine Control Module Power Relay Control Circuit High
P0687 2016 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit High

Common Causes of P0687 2016 Chevrolet Silverado

  1. Faulty ECM power relay.
  2. Wiring issues in the power relay circuit.
  3. Malfunctioning ECM.
  4. Poor ground connection for the relay circuit.
  5. Electrical system issues.

Symptoms of P0687 2016 Chevrolet Silverado

  1. Check engine light illuminated on the dashboard.
  2. Engine may run rough or misfire.
  3. Reduced fuel efficiency.
  4. Engine stalling or difficulty starting.
  5. Loss of power while driving.

How to Fix P0687 2016 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the power relay circuit and wiring to identify any visible damage or loose connections.
  2. Test the ECM power relay to determine if it is functioning correctly. Replace the relay if necessary.
  3. Check the ECM for any signs of damage or malfunction. Replace the ECM if it is found to be faulty.
  4. Ensure that the ground connection for the relay circuit is secure and free of corrosion.
  5. Clear the trouble code from the vehicle's computer system and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0687 2016 Chevrolet Silverado

The typical repair costs for addressing the P0687 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty ECM power relay can range from $50 to $150, while replacing the ECM itself can cost anywhere from $300 to $800. Labor costs for diagnosis and repair can add an additional $100 to $300 to the total bill. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the rates charged by the auto repair shop. It's recommended to obtain quotes from multiple shops to ensure a competitive price for the repair.

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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 P0687 2016 Chevrolet Silverado Code

1. What does OBDII code P0687 on a 2016 Chevrolet Silverado mean?

The code P0687 indicates a problem with the Engine Control Module (ECM) Power Relay Control Circuit being too high, affecting the power relay that controls the ECM.

2. What are the common symptoms of OBDII code P0687 in a 2016 Chevrolet Silverado?

Common symptoms of code P0687 may include the vehicle stalling or not starting, reduced engine performance, illuminated Check Engine Light, and potential issues with other electrical systems.

3. What are the possible causes of OBDII code P0687 on a 2016 Chevrolet Silverado?

Potential causes of code P0687 include a faulty ECM power relay, damaged wiring or connectors in the power relay circuit, a defective ECM, or underlying issues with the vehicle's electrical system.

4. How can I diagnose OBDII code P0687 on my 2016 Chevrolet Silverado?

Diagnosing code P0687 involves checking the ECM power relay and its circuit for any visible damage, testing the relay for proper functioning, inspecting the wiring and connectors for faults, and using a diagnostic scanner to retrieve additional information.

5. Can I still drive my 2016 Chevrolet Silverado with OBDII code P0687?

It is not recommended to drive your vehicle with an active P0687 fault code, as it may lead to further damage or unsafe driving conditions. It is best to address the issue promptly to prevent any potential complications.

6. How can I repair OBDII code P0687 on my 2016 Chevrolet Silverado?

Repairing code P0687 may involve replacing the ECM power relay if faulty, repairing any damaged wiring or connectors, resetting the fault code with a diagnostic scanner, and conducting a thorough system test to ensure the issue is resolved.

7. Will resetting the fault code for P0687 on my 2016 Chevrolet Silverado make the problem go away?

Resetting the fault code may temporarily clear the Check Engine Light, but it will not fix the underlying issue causing code P0687. It is crucial to diagnose and address the root cause of the problem to prevent future occurrences.

8. How much does it cost to repair OBDII code P0687 on a 2016 Chevrolet Silverado?

The cost of repairing code P0687 can vary depending on the specific cause of the issue, the labor rates in your area, and whether any parts need replacement. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0687 on a 2016 Chevrolet Silverado?

While some experienced DIY enthusiasts may be able to diagnose and repair code P0687 themselves, it is recommended to seek professional help, especially when dealing with electrical components like the ECM and power relay to ensure proper repairs and safety.

10. How can I prevent OBDII code P0687 from recurring on my 2016 Chevrolet Silverado?

To prevent the recurrence of code P0687, it is essential to perform regular vehicle maintenance, address any electrical issues promptly, avoid overloading the electrical system, and ensure all components are in good working condition.

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