AutoCodes – GMC – P0690 2016 GMC Sierra

P0690 2016 GMC Sierra Code - Electronic Control Module Power Relay Sense 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: P0690 2016 GMC Sierra indicates Electronic Control Module Power Relay Sense 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 202

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 P0690 2016 GMC Sierra 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 P0690 2016 GMC Sierra - Electronic Control Module Power Relay Sense Circuit High - AutoCodes.com — P0690 2016 GMC Sierra Code - Electronic Control Module Power Relay Sense Circuit High

What does this mean?

What are the Possible Causes of the DTC P0690 2016 GMC Sierra?

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 P0690 2016 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 P0690 2016 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 P0690 2016 GMC Sierra code?

Need more information on how to fix the P0690 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 P0690 2016 GMC Sierra Code

1. What does the OBDII code P0690 for a 2016 GMC Sierra mean?

- The code P0690 indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being too high.

2. What are the common symptoms of OBDII code P0690 in a 2016 GMC Sierra?

- Common symptoms include difficulty starting the vehicle, engine stalling, and potential loss of power while driving.

3. What are possible causes of the ECM Power Relay Sense Circuit high in a 2016 GMC Sierra?

- Causes can include a faulty ECM power relay, damaged wiring or connectors in the power relay circuit, or issues with the ECM itself.

4. How can I diagnose the ECM Power Relay Sense Circuit high issue in my 2016 GMC Sierra?

- Diagnosing this issue typically involves checking the power relay and related wiring for any signs of damage or corrosion, as well as testing the ECM for proper functionality.

5. Can driving with the P0690 code in a 2016 GMC Sierra cause further damage?

- Continuing to drive with this code may lead to further electrical system issues or potential damage to the ECM, so it is best to address the problem promptly.

6. How can I repair the ECM Power Relay Sense Circuit high problem in my 2016 GMC Sierra?

- Repair may involve replacing the ECM power relay, repairing damaged wiring or connectors, or even replacing the ECM if necessary.

7. Is it safe to continue driving my 2016 GMC Sierra with the P0690 code?

- It is not recommended to drive the vehicle with this code present, as it can lead to unreliable performance and potential safety hazards.

8. Can I reset the OBDII code P0690 in my 2016 GMC Sierra using a diagnostic scanner?

- Yes, a diagnostic scanner can be used to clear the code after the underlying issue has been addressed and resolved.

9. How much does it cost to repair the ECM Power Relay Sense Circuit high issue in a 2016 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the problem, but it may involve parts and labor costs ranging from $100 to $500 or more.

10. Are there any preventive measures to avoid the ECM Power Relay Sense Circuit high problem in a 2016 GMC Sierra?

- Regular vehicle maintenance, including checking the electrical system components, can help prevent issues like the ECM Power Relay Sense Circuit high from occurring.