AutoCodes – GMC – P0690 2014 GMC Sierra

P0690 2014 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 2014 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 182

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 2014 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 2014 GMC Sierra - Electronic Control Module Power Relay Sense Circuit High - AutoCodes.com — P0690 2014 GMC Sierra Code - Electronic Control Module Power Relay Sense Circuit High

What does this mean?

What are the Possible Causes of the DTC P0690 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P0690 2014 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 2014 GMC Sierra Code

1. What does the OBDII code P0690 mean on a 2014 GMC Sierra?

P0690 indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being stuck at a high voltage level, suggesting an electrical issue.

2. What are the common symptoms of code P0690 in a 2014 GMC Sierra?

Symptoms may include difficulty starting, engine stalling, reduced performance, check engine light illumination, or failure of certain electrical components.

3. What causes the P0690 code to appear on a GMC Sierra?

Common causes include a faulty ECM power relay, damaged wiring or connectors in the relay circuit, a failed ECM, or a blown fuse.

4. Can a bad battery cause the P0690 code?

Yes, a weak or failing battery can cause voltage irregularities that may trigger the P0690 code.

5. How do you diagnose the P0690 code on a 2014 GMC Sierra?

Diagnosis typically involves checking the ECM power relay, inspecting wiring and connectors for damage, testing the battery and fuses, and using a multimeter to measure circuit voltage.

6. Can I drive my 2014 GMC Sierra with the P0690 code?

Itâ€™s not recommended to drive with this code present, as it could lead to stalling or additional electrical issues that may leave you stranded.

7. How is the P0690 code fixed on a GMC Sierra?

Repairs may include replacing the ECM power relay, repairing or replacing damaged wiring or connectors, replacing a blown fuse, or, in rare cases, replacing the ECM.

8. How much does it cost to repair the P0690 code on a 2014 GMC Sierra?

Repair costs vary depending on the issue but can range from $50-$200 for a relay or wiring fix, and significantly more if the ECM needs replacement.

9. Can a bad ECM cause the P0690 code?

Yes, a failing ECM can cause this code, but it is typically diagnosed after ruling out simpler issues like the relay or wiring problems.

10. How do I prevent the P0690 code from recurring in my GMC Sierra?

Regularly inspect and maintain your vehicle's electrical system, ensure connections are clean and secure, and replace relays or fuses at the first sign of wear.