AutoCodes – Mitsubishi – P0605 Mitsubishi

P0605 Mitsubishi Code - Internal Control Module ROM

Quick Answer

The Engine Control Module (ECM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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: P0605 Mitsubishi indicates Internal Control Module ROM.
Common causes: Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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 7,011

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 P0605 Mitsubishi Description

The Engine Control Module (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 sets the P0605 code and illuminates the MIL.

OBDII Code P0605 Mitsubishi - Internal Control Module ROM - AutoCodes.com — P0605 Mitsubishi Code - Internal Control Module ROM

What does this mean?

What are the Possible Causes of the DTC P0605 Mitsubishi?

Engine Control Module (ECM) may be faulty
ECM harness power supply circuit is open or shorted
ECM harness ground circuit is open or shorted

How to Fix the DTC P0605 Mitsubishi?

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 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 P0605 Mitsubishi 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 P0605 Mitsubishi code?

Need more information on how to fix the P0605 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0605 Mitsubishi 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 P0605 Mitsubishi Code

1. What does OBDII code P0605 for Mitsubishi indicate?

- OBDII code P0605 indicates a malfunction in the Internal Control Module ROM.

2. What are the common symptoms associated with OBDII code P0605 in a Mitsubishi vehicle?

- Common symptoms include engine stalling, rough idling, poor acceleration, and the illumination of the Check Engine Light.

3. What are the possible causes of OBDII code P0605 in a Mitsubishi vehicle?

- Possible causes include a faulty internal control module, damaged control module software, wiring issues, or a weak battery.

4. How can I diagnose OBDII code P0605 in my Mitsubishi vehicle?

- Diagnosing OBDII code P0605 typically involves using an OBDII scanner to retrieve the code, checking for other related codes, and inspecting the control module and its connections.

5. Can OBDII code P0605 be cleared/reset, or does it require immediate repair?

- OBDII code P0605 can be cleared/reset, but it is recommended to diagnose and repair the underlying issue to prevent further problems.

6. What are some repair tips for addressing OBDII code P0605 in a Mitsubishi vehicle?

- Repair tips include checking the control module connections, ensuring the battery is in good condition, and reprogramming or replacing the control module if necessary.

7. Is it safe to continue driving with OBDII code P0605 present in a Mitsubishi vehicle?

- It is not recommended to drive with OBDII code P0605 present, as it can lead to further engine performance issues and potential safety concerns.

8. How much does it typically cost to repair OBDII code P0605 in a Mitsubishi vehicle?

- The cost of repairing OBDII code P0605 can vary depending on the specific cause and the labor rates of the repair shop, but it may range from $200 to $800.

9. Can I attempt to fix OBDII code P0605 on my own, or should I seek professional help?

- While some simple checks like inspecting connections can be done by DIY enthusiasts, diagnosing and repairing OBDII code P0605 often requires professional expertise due to the complexity of the control module.

10. How can I prevent OBDII code P0605 from occurring in my Mitsubishi vehicle in the future?

- To prevent OBDII code P0605, it is essential to maintain a healthy battery, avoid electrical system issues, and regularly check for any signs of engine performance problems.