AutoCodes – Isuzu – P0690 Isuzu

P0690 Isuzu Code - Engine Controls Ignition Relay Feedback Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) monitors the power inputs. Common causes include Faulty Engine Control Module (ECM) relay, Faulty ECM, ECM harness is open or shorted. 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 Isuzu indicates Engine Controls Ignition Relay Feedback Circuit High Voltage.
Common causes: Common causes include Faulty Engine Control Module (ECM) relay, Faulty ECM, ECM harness is open or shorted.
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 4,559

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 May 05, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0690 Isuzu Description

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM remains powered up after the ignition switch has been turned OFF.

OBDII Code P0690 Isuzu - Engine Controls Ignition Relay Feedback Circuit High Voltage - AutoCodes.com — P0690 Isuzu Code - Engine Controls Ignition Relay Feedback Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0690 Isuzu?

Faulty Engine Control Module (ECM) relay
Faulty ECM
ECM harness is open or shorted
ECM circuit poor electrical connection

How to Fix the DTC P0690 Isuzu?

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 does this mean?

Code Tech Notes

Check all the ECM fuses, if the fuses are OK try replacing the ECM relay.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0690 Isuzu 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 Isuzu code?

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

Need Help with the Code?

Get the P0690 Isuzu 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 P0690 Isuzu Code

1. What are the common symptoms of OBDII code P0690 in an Isuzu vehicle?

- Common symptoms include engine misfires, poor acceleration, difficulty starting the engine, and illuminated check engine light.

2. What does the OBDII code P0690 indicate in an Isuzu vehicle?

- The code P0690 indicates a problem with the Engine Controls Ignition Relay Feedback Circuit High Voltage in the vehicle.

3. What are the potential causes of OBDII code P0690 in an Isuzu?

- Possible causes include a faulty ignition relay, damaged wiring or connectors in the ignition relay circuit, or a malfunctioning engine control module (ECM).

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

- Diagnosis involves using a scan tool to read the code, inspecting the ignition relay and related components, checking the wiring for damage, and testing the ECM for proper functioning.

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

- It is not recommended to drive the vehicle with code P0690, as it can lead to poor engine performance and potential further damage if left unresolved.

6. How can I repair OBDII code P0690 in my Isuzu?

- Repair options include replacing the faulty ignition relay, repairing or replacing damaged wiring or connectors, and, if necessary, reprogramming or replacing the ECM.

7. Is OBDII code P0690 a serious issue in an Isuzu vehicle?

- Yes, code P0690 should be addressed promptly to prevent potential engine damage and ensure proper vehicle performance.

8. How much does it cost to fix OBDII code P0690 in an Isuzu?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can I clear OBDII code P0690 in my Isuzu with a scan tool?

- Yes, you can clear the code with a scan tool, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

10. How long does it take to repair OBDII code P0690 in an Isuzu?

- The repair time can vary depending on the specific cause of the code and the complexity of the repair, but it may take anywhere from 1 to 4 hours to complete the repair.