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P0690 Mitsubishi Code - Electronic Control Module Power Relay Sense Circuit High

Quick Answer

The P0690 code for Mitsubishi vehicles indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being too high. Common causes include Faulty power relay, Short circuit in the wiring, Damaged wire connections. 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 Mitsubishi indicates Electronic Control Module Power Relay Sense Circuit High.
Common causes
Common causes include Faulty power relay, Short circuit in the wiring, Damaged wire connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0690 Mitsubishi Description

The P0690 code for Mitsubishi vehicles indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being too high. The ECM power relay is responsible for providing power to the ECM, which controls various functions in the vehicle such as engine performance, transmission shifting, and emissions control. The sense circuit is designed to monitor the voltage level of the power relay to ensure it is within the acceptable range. When the voltage is too high, it can lead to issues with the ECM's operation and potentially cause damage to the system.

OBDII Code P0690 Mitsubishi - Electronic Control Module Power Relay Sense Circuit High
P0690 Mitsubishi Code - Electronic Control Module Power Relay Sense Circuit High

Common Causes of P0690 Mitsubishi

  1. Faulty power relay
  2. Short circuit in the wiring
  3. Damaged wire connections
  4. ECM malfunction
  5. Electrical system issues

Symptoms of P0690 Mitsubishi

  1. Rough idling
  2. Stalling
  3. Poor acceleration
  4. Decreased fuel efficiency
  5. Vehicle failing to start

How to Fix P0690 Mitsubishi

  1. Begin by diagnosing the specific cause of the high voltage in the power relay sense circuit using a diagnostic scanner.
  2. Inspect the power relay and its wiring for any signs of damage or corrosion. Replace any components that are faulty.
  3. Check the ECM for any signs of damage or malfunction. Repair or replace the ECM if necessary.
  4. Clear the diagnostic trouble codes from the vehicle's memory and retest the system to ensure the issue has been resolved.
  5. Perform a test drive to confirm that the symptoms associated with the P0690 code have been eliminated.

Cost to Fix P0690 Mitsubishi

The typical repair costs for addressing the P0690 code in a Mitsubishi vehicle can range from $200 to $500, depending on the specific cause of the issue and the extent of repairs needed. This estimate includes the cost of parts such as a new power relay or ECM, as well as labor charges for the diagnosis and repair process. It is recommended to consult with a qualified mechanic or auto repair shop to obtain a more accurate cost estimate based on the individual circumstances of the vehicle. Keep in mind that labor rates can vary based on location and the shop's hourly rates.

What does this mean?

Tech Notes for P0690 Mitsubishi

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

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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 Mitsubishi Code

1. What are the common symptoms of OBDII code P0690 in a Mitsubishi related to the Electronic Control Module Power Relay Sense Circuit High?

The common symptoms include engine stalling, difficulty starting the vehicle, and a check engine light illuminating on the dashboard.

2. What are the possible causes of the P0690 code in a Mitsubishi?

Possible causes of this code include a faulty electronic control module power relay, a short circuit in the power relay sense circuit, or a damaged wiring harness.

3. How can I diagnose the cause of the P0690 code in my Mitsubishi?

To diagnose the cause of the P0690 code, you can use a diagnostic scanner to retrieve the code and then inspect the electronic control module power relay, check for any wiring issues, and test the power relay sense circuit.

4. Can I continue driving my Mitsubishi with the P0690 code present?

It is not recommended to continue driving your Mitsubishi with the P0690 code present, as it can lead to more severe issues such as engine failure or further damage to the electronic control module.

5. What are some repair tips for fixing the P0690 code in a Mitsubishi?

Repair tips include checking and replacing the electronic control module power relay if necessary, repairing any damaged wiring, and clearing the code with a diagnostic scanner after the repairs are complete.

6. Is it possible to reset the P0690 code in a Mitsubishi without making any repairs?

While you can clear the code with a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the P0690 code in a Mitsubishi?

The cost of repairing the P0690 code can vary depending on the exact cause of the issue, but it may range from around $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the P0690 code in a Mitsubishi at home?

If you have the necessary tools and experience working on automotive electrical systems, you may be able to fix the P0690 code at home. However, it is recommended to consult a professional if you are unsure.

9. Will the P0690 code cause any long-term damage to my Mitsubishi if left untreated?

Leaving the P0690 code untreated can potentially cause further damage to your Mitsubishi's electronic control module and other related components, leading to more expensive repairs down the line.

10. How long does it typically take to repair the P0690 code in a Mitsubishi?

The repair time for the P0690 code can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from a few hours to a full day to complete the repairs.

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