AutoCodes – MINI – P0604 MINI

P0604 MINI Code - ECM Self Check Fault

Quick Answer

The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Loose or poor battery terminal connection, Low battery charge, ECM power supply circuit 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: P0604 MINI indicates ECM Self Check Fault.
Common causes: Common causes include Loose or poor battery terminal connection, Low battery charge, ECM power supply circuit 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 1,982

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0604 MINI Description

The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light.

OBDII Code P0604 MINI - ECM Self Check Fault - AutoCodes.com — P0604 MINI Code - ECM Self Check Fault

What does this mean?

What are the Possible Causes of the DTC P0604 MINI?

Loose or poor battery terminal connection
Low battery charge
ECM power supply circuit is open or shorted
ECM Programing
Faulty ECM

How to Fix the DTC P0604 MINI?

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 the ECM/PCM fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the ECM.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0604 MINI 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 P0604 MINI code?

Need more information on how to fix the P0604 MINI code? Get Access to Factory Service Manuals

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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 P0604 MINI Code

1. What are the common symptoms of OBDII code P0604 in a MINI vehicle?

The common symptoms of OBDII code P0604 in a MINI vehicle include the check engine light illuminating on the dashboard, engine performance issues such as rough idling or stalling, and potential difficulty starting the vehicle.

2. What does the OBDII code P0604 MINI indicate?

OBDII code P0604 in a MINI indicates an ECM (Engine Control Module) Self Check Fault, suggesting an internal fault within the vehicle's engine control module.

3. What are the possible causes of OBDII code P0604 in a MINI?

Possible causes of OBDII code P0604 in a MINI include a faulty engine control module (ECM), damaged wiring or connectors related to the ECM, software issues within the ECM, or a weak battery causing voltage fluctuations.

4. How can I diagnose OBDII code P0604 in my MINI?

Diagnosing OBDII code P0604 in a MINI typically involves using an OBDII scanner to retrieve the code, checking for any other related codes, inspecting the ECM and its connections for visible damage, and performing voltage tests to ensure proper electrical supply.

5. Can I continue driving my MINI with OBDII code P0604 present?

It is not recommended to continue driving your MINI with OBDII code P0604 present, as it can lead to potential engine performance issues and further damage if left unresolved. It's best to address the underlying problem promptly.

6. How can I repair OBDII code P0604 in my MINI?

Repairing OBDII code P0604 in a MINI may involve replacing the faulty ECM, repairing or replacing damaged wiring and connectors, updating the ECM software if necessary, and ensuring a stable electrical system with a properly functioning battery.

7. Is it possible to reset OBDII code P0604 in a MINI without fixing the underlying issue?

While it is possible to clear the OBDII code P0604 temporarily by resetting the ECM, the underlying issue causing the fault must be addressed to prevent the code from reappearing.

8. Can a DIY enthusiast fix OBDII code P0604 in a MINI?

Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address OBDII code P0604 in a MINI by following diagnostic procedures, replacing the ECM, or repairing wiring issues. However, professional assistance is recommended for complex ECM-related repairs.

9. How much does it cost to fix OBDII code P0604 in a MINI?

The cost to fix OBDII code P0604 in a MINI can vary depending on the exact cause of the fault, the need for ECM replacement, labor costs, and any additional parts required. It is advisable to obtain quotes from reputable mechanics or dealerships.

10. Can regular maintenance help prevent OBDII code P0604 in a MINI?

While regular maintenance cannot guarantee the prevention of OBDII code P0604, ensuring timely inspections, addressing any ECM software updates recommended by the manufacturer, and maintaining a healthy electrical system can help reduce the risk of encountering such faults.