AutoCodes – Chevrolet – P0687 2016 Chevrolet Silverado

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

Quick Answer

The powertrain relay is a normally open relay. Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (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: P0687 2016 Chevrolet Silverado indicates Engine Control Module Power Relay Control Circuit High.
Common causes: Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (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.

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Code Popularity 333

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 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0687 2016 Chevrolet Silverado Description

The powertrain relay is a normally open relay. The relay armature is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the armature contact at all times. The Engine Control Module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an Output Driver Module (ODM). The ODM output control is configured to operate as a low side driver for the powertrain relay. The ODM for the powertrain relay also incorporates a fault detection circuit, which is continuously monitored by the ECM. When the ECM commands the powertrain relay ON, ignition 1 voltage is supplied to the ECM, and to several additional circuits.

OBDII Code P0687 2016 Chevrolet Silverado - Engine Control Module Power Relay Control Circuit High - AutoCodes.com — P0687 2016 Chevrolet Silverado Code - Engine Control Module Power Relay Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0687 2016 Chevrolet Silverado?

Weak battery
Low voltage while cranking
Faulty Engine Control Module (ECM) power relay
ECM power relay harness is open or shorted
ECM power relay circuit poor electrical connection
Blown ECM fuse
Faulty ECM

How to Fix the DTC P0687 2016 Chevrolet Silverado?

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 P0687 2016 Chevrolet Silverado 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 P0687 2016 Chevrolet Silverado code?

Need more information on how to fix the P0687 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0687 2016 Chevrolet Silverado 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 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.