AutoCodes – Toyota – P0605 Toyota

P0605 Toyota Code - Internal Control Module Random Access Memory Error

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 Toyota indicates Internal Control Module Random Access Memory Error.
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 16,183

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 Toyota 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 Toyota - Internal Control Module Random Access Memory Error - AutoCodes.com — P0605 Toyota Code - Internal Control Module Random Access Memory Error

What does this mean?

What are the Possible Causes of the DTC P0605 Toyota?

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 Toyota?

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 Toyota 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 Toyota code?

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

Need Help with the Code?

Get the P0605 Toyota 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 Toyota Code

1. What are the common symptoms of OBDII code P0605 in a Toyota vehicle?

The common symptoms of OBDII code P0605, also known as Internal Control Module Random Access Memory Error, in a Toyota vehicle may include rough idling, engine stalling, poor acceleration, and issues with starting the car.

2. What are the possible causes of OBDII code P0605 in a Toyota?

The possible causes of OBDII code P0605 in a Toyota include a faulty engine control module (ECM), a corrupted ECM software, electrical issues, or a weak battery causing voltage fluctuations.

3. How can I diagnose OBDII code P0605 in my Toyota?

Diagnosing OBDII code P0605 in your Toyota involves using an OBDII scanner to retrieve the specific error code, checking for any other related trouble codes, and performing a thorough inspection of the ECM and its connections.

4. Can I continue driving my Toyota with OBDII code P0605?

It is not recommended to continue driving your Toyota with OBDII code P0605 as it can lead to further damage to the engine control module and other components. It is advised to address the issue promptly.

5. How can I repair OBDII code P0605 in my Toyota?

Repairing OBDII code P0605 in your Toyota may involve reprogramming or replacing the engine control module (ECM), addressing any underlying electrical issues, and ensuring a stable power supply to the ECM.

6. Is it possible to reset OBDII code P0605 in a Toyota by disconnecting the battery?

Disconnecting the battery may temporarily clear the error code, but it is not a permanent solution for OBDII code P0605. It is recommended to diagnose the root cause of the issue and address it accordingly.

7. Can a DIY enthusiast fix OBDII code P0605 in a Toyota?

While some basic troubleshooting steps can be taken by a DIY enthusiast, repairing OBDII code P0605 in a Toyota often requires specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Will OBDII code P0605 cause my Toyota to fail an emissions test?

Yes, OBDII code P0605 can cause your Toyota to fail an emissions test as it indicates a problem with the engine control module, which can affect the vehicle's emissions control system.

9. How much does it typically cost to repair OBDII code P0605 in a Toyota?

The cost of repairing OBDII code P0605 in a Toyota can vary depending on the underlying cause, the extent of the damage, and the labor rates in your area. It is advisable to obtain quotes from reputable automotive repair shops.

10. Can OBDII code P0605 be a recurring issue in a Toyota?

OBDII code P0605 can be a recurring issue in a Toyota if the root cause, such as electrical issues or a faulty ECM, is not properly addressed during the repair process. Regular maintenance and addressing any related issues can help prevent its recurrence.