AutoCodes – Pontiac – P0690 Pontiac

P0690 Pontiac 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 Pontiac 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 2,925

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 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0690 Pontiac 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 Pontiac - Electronic Control Module Power Relay Sense Circuit High - AutoCodes.com — P0690 Pontiac Code - Electronic Control Module Power Relay Sense Circuit High

What does this mean?

What are the Possible Causes of the DTC P0690 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac 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 Pontiac Code

1. What are the common symptoms of OBDII code P0690 in a Pontiac?

- Common symptoms include rough engine performance, stalling, poor fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0690 Pontiac mean?

- The code P0690 indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit, specifically a high voltage condition.

3. What are the possible causes of OBDII code P0690 in a Pontiac?

- The possible causes include a faulty ECM power relay, damaged wiring or connectors in the power relay circuit, or an ECM malfunction.

4. How can I diagnose the OBDII code P0690 in my Pontiac?

- Diagnosing the code involves using a diagnostic scanner to retrieve the fault codes, inspecting the power relay circuit, checking the relay for proper operation, and testing the ECM.

5. Can I drive my Pontiac with OBDII code P0690?

- It is not recommended to drive your Pontiac with the P0690 code present, as it can lead to further engine damage or performance issues.

6. How do I repair OBDII code P0690 in my Pontiac?

- The repair process involves replacing the faulty ECM power relay, repairing any damaged wiring or connectors, and clearing the fault codes with a diagnostic scanner.

7. Are there any DIY tips for fixing OBDII code P0690 in a Pontiac?

- While some may attempt to replace the ECM power relay themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Can a bad battery cause OBDII code P0690 in a Pontiac?

- A weak or failing battery can potentially cause voltage issues that trigger the P0690 code, so it's important to ensure the battery is in good condition.

9. How long does it take to repair OBDII code P0690 in a Pontiac?

- The repair time can vary depending on the exact cause of the issue, but it typically takes a few hours to diagnose and replace the faulty components.

10. Will resetting the Check Engine Light resolve OBDII code P0690 in a Pontiac?

- Resetting the light may temporarily turn it off, but it will not fix the underlying issue causing the P0690 code. It is important to address the root cause of the problem to prevent further issues.