AutoCodesChevrolet – P0605 Chevrolet

P0605 Chevrolet Code - Control Module Programming Read Only Memory Performance

Quick Answer

This diagnostic applies to internal microprocessor integrity conditions within the device. Common causes include Low battery voltage, Reprogram Powertrain Control Module (PCM), Faulty Powertrain Control Module. 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 Chevrolet indicates Control Module Programming Read Only Memory Performance.
Common causes
Common causes include Low battery voltage, Reprogram Powertrain Control Module (PCM), Faulty Powertrain Control Module.
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 2,892
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 26, 2021
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Code P0605 Chevrolet Description

This diagnostic applies to internal microprocessor integrity conditions within the device. This diagnostic also addresses if the device is not programmed. The device monitors its ability to read and write to the memory. It also monitors a timing function. No external circuits are involved. The Diagnostic Trouble Code (DTC) will be set when the device detects an internal malfunction or incomplete programming.
OBDII Code P0605 Chevrolet - Control Module Programming Read Only Memory Performance - AutoCodes.com
P0605 Chevrolet Code - Control Module Programming Read Only Memory Performance

What are the Possible Causes of the DTC P0605 Chevrolet?

  • Low battery voltage
  • Reprogram Powertrain Control Module (PCM)
  • Faulty Powertrain Control Module
  • Powertrain Control Module harness is open or shorted
  • Powertrain Control Module circuit poor electrical connection

How to Fix the DTC P0605 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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Need Help with the Code?

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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 P0605 Chevrolet Code

1. What does the OBDII code P0605 mean for a Chevrolet vehicle?

P0605 indicates an issue with the Control Module's Read Only Memory (ROM), specifically a performance error or fault detected during a self-test.

2. What are the common symptoms of a P0605 code in a Chevrolet?

Symptoms may include the Check Engine Light turning on, poor engine performance, hesitation or stalling, and in some cases, the vehicle may not start.

3. What causes a P0605 code on a Chevrolet?

Common causes include corrupted software in the engine control module (ECM), a faulty ECM, electrical issues such as poor connections or damaged wiring, or interference from aftermarket modifications.

4. Can I drive my Chevrolet with a P0605 code?

It is not recommended to drive with a P0605 code, as it can lead to erratic engine performance or potential safety issues. Addressing the code promptly is important.

5. How is a P0605 code diagnosed on a Chevrolet?

Diagnosis typically involves scanning the vehicle with an OBDII scanner, checking the ECM for software updates or faults, inspecting wiring and connections, and confirming no other codes are affecting the ECM.

6. How can I fix the P0605 code on my Chevrolet?

Repairs may include reprogramming or updating the ECM, repairing or replacing damaged wiring or connectors, or replacing the ECM if it is determined to be faulty.

7. Does a P0605 code always mean the ECM is bad?

Not necessarily. While a faulty ECM is a possibility, the issue could also stem from software corruption, electrical problems, or external interference.

8. How much does it cost to fix a P0605 code on a Chevrolet?

The cost can vary widely depending on the cause, ranging from $100-$300 for software reprogramming to $500-$1,500 for ECM replacement and labor.

9. Can a P0605 code be caused by a dead battery in my Chevrolet?

A dead or weak battery can sometimes cause corruption in the ECM’s programming, which might trigger a P0605 code, but this is not a common cause.

10. Is it possible to clear a P0605 code without repairs?

Clearing the code with an OBDII scanner may temporarily erase it, but if the underlying problem isn't resolved, the code will likely return.

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