AutoCodes – Generic – P0605

P0605 Code - Control Module Fault

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 indicates Control Module Fault.
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 35,580

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 Jul 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0605 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 Engine Control Module is functioning properly. The Diagnostic Trouble Code (DTC) will set when the Engine Control Module Read Only Memory (ROM) has been corrupted.

OBDII Code P0605 - Control Module Fault - AutoCodes.com — P0605 Code - Control Module Fault

What does this mean?

What are the Possible Causes of the DTC P0605?

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?

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 P0605 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.

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Need Help with the Code?

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Information for Specific Makes

P0605 Buick — Control Module Programming Read Only Memory Performance
P0605 Cadillac — Control Module Programming Read Only Memory Performance
P0605 Chevrolet — Control Module Programming Read Only Memory Performance
P0605 Chrysler — Control Module Fault
P0605 Dodge — Control Module Fault
P0605 Ford — Internal Control Module Read Only Memory Error
P0605 GMC — Control Module Programming Read Only Memory Performance
P0605 Hyundai — Internal Control Module ROM Error
P0605 Infiniti — Engine Control Module Fault
P0605 Isuzu — Internal Processor Error
P0605 Jeep — Control Module Fault
P0605 KIA — EEPROM Fault
P0605 Lincoln — Internal Control Module Read Only Memory Error
P0605 Mazda — Internal Control Module ROM Error
P0605 Mercedes-Benz — Control Module Fault
P0605 Mercury — Internal Control Module Read Only Memory Error
P0605 Mitsubishi — Internal Control Module ROM
P0605 Nissan — Engine Control Module Fault
P0605 Subaru — Internal Control Module Read Only Memory Error
P0605 Toyota — Internal Control Module Random Access Memory Error
P0605 Volkswagen — Internal Control Module Read Only Memory Error
P0605 Volvo — Control Module Fault

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 Code

No Frequently Asked Questions about P0605 Code found.

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francis makoba
Date: January 15, 2015 at 11:09 pm

I a problem of gazement I did the checking on my pathfinder jeep 2008 its ever engine management module provides another I change his memory still gives the same failure, the year can be or

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Love Cars
Date: January 14, 2016 at 11:42 pm

P0605 Indicates that the programming for your transmission functions has become corrupted. In your 2008 Jeep, you should have one module (PCM) that controls the engine & transmission, and most likely needs to be replaced. If you have a individual TCM, it will be a little black box (a bit bigger then a credit card) under your dash on the DRIVER SIDE.
Note to some readers: If you are getting this code on an older vehicle (before 2003), especially Chrysler products, and you are getting this Code your TCM needs to be replaced. Flashing the TCM will not resolve this issue (maybe for 2 weeks at most). I say this because the info provided in the description of the Code is geared towards newer vehicles that use a PCM (or ECM as commonly referred to still).

Reply to Comment
OBDIITech
Date: January 14, 2016 at 11:45 pm

Thank you for the information!!
We have added a page for Jeep with your information: http://www.autocodes.com/p0...

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