AutoCodes – Mazda – P0690 Mazda

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

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 Mazda indicates Electronic Control Module Power Relay Sense Circuit High.
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 3,104

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
Cost to Diagnose
FAQs
Comments
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Code P0690 Mazda 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 Mazda - Electronic Control Module Power Relay Sense Circuit High - AutoCodes.com — P0690 Mazda Code - Electronic Control Module Power Relay Sense Circuit High

What does this mean?

What are the Possible Causes of the DTC P0690 Mazda?

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 Mazda?

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 Mazda 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 Mazda code?

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

Need Help with the Code?

Get the P0690 Mazda 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 Mazda Code

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

- Common symptoms include the Check Engine Light illuminating, engine performance issues, and potential stalling or difficulty starting the vehicle.

2. What could cause the Electronic Control Module Power Relay Sense Circuit High error code P0690 in a Mazda?

- Possible causes include a faulty power relay, issues with the power relay circuit, wiring problems, or a malfunctioning Electronic Control Module.

3. How can I diagnose the Electronic Control Module Power Relay Sense Circuit High code P0690 in my Mazda?

- Diagnosing this code typically involves checking the power relay, inspecting the wiring and connectors, testing the Electronic Control Module, and using a scan tool to gather data.

4. Can I drive my Mazda with the OBDII code P0690 present?

- It is not recommended to drive your vehicle with this code active, as it can lead to further damage and potential safety hazards. Immediate attention is advised.

5. How serious is the P0690 code related to the Electronic Control Module Power Relay Sense Circuit High in a Mazda?

- This code is considered serious as it can affect the proper functioning of essential engine control systems, potentially leading to engine performance issues or stalling.

6. What repairs are typically needed to fix the P0690 code in a Mazda?

- Repairs may involve replacing a faulty power relay, repairing wiring or connectors, or replacing the Electronic Control Module if necessary.

7. Can a DIY enthusiast fix the P0690 code in a Mazda?

- Depending on the level of expertise and access to tools, some DIY enthusiasts may be able to address this issue, particularly if it involves simple tasks like checking connections or replacing a relay.

8. How much does it cost to repair the Electronic Control Module Power Relay Sense Circuit High code in a Mazda?

- Repair costs can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor to potentially more if the Electronic Control Module needs replacement.

9. Will resetting the OBDII code P0690 in my Mazda make the issue go away?

- Resetting the code may temporarily turn off the Check Engine Light, but it will not fix the underlying problem causing the P0690 code. It is essential to diagnose and address the root cause.

10. Is it safe to clear the P0690 code using an OBDII scanner without fixing the issue in my Mazda?

- While clearing the code may temporarily remove the warning light, it is not recommended to ignore or mask the underlying problem, as it can lead to further issues and potential safety risks.