AutoCodes – Pontiac – P0604 Pontiac

P0604 Pontiac Code - Control Module Random Access Memory

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: P0604 Pontiac indicates Control Module Random Access Memory.
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 5,694

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 Mar 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0604 Pontiac 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 P0604 Pontiac - Control Module Random Access Memory - AutoCodes.com — P0604 Pontiac Code - Control Module Random Access Memory

What does this mean?

What are the Possible Causes of the DTC P0604 Pontiac?

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 P0604 Pontiac?

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 Powertrain Control Module (PCM) fuse, if the fuse is OK, then try erasing the code first and if the code comes back you may have to reprogram or replace the PCM.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0604 Pontiac 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 Pontiac 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 P0604 Pontiac Code

1. What does the OBDII code P0604 mean on a Pontiac?

P0604 indicates an issue with the control module's Random Access Memory (RAM), which may affect the vehicle's operation.

2. What are the symptoms of code P0604 on a Pontiac?

Symptoms may include difficulty starting the vehicle, erratic engine performance, stalling, or illuminated check engine light.

3. What causes the P0604 code on a Pontiac?

Common causes include a faulty control module, electrical issues such as corroded connectors or damaged wiring, or software glitches.

4. Can I drive my Pontiac with a P0604 code?

Driving with a P0604 code may be unsafe if the engine performance becomes erratic or the vehicle stalls unexpectedly. It's best to address the issue promptly.

5. How is the P0604 code diagnosed on a Pontiac?

Technicians use a scan tool to read the code, inspect the control module, check for wiring or connector issues, and test the power supply to the module.

6. What repairs are needed to fix code P0604 on a Pontiac?

Repairs may include replacing or reprogramming the control module, repairing damaged wiring, or cleaning and reconnecting corroded connectors.

7. How much does it cost to fix the P0604 code on a Pontiac?

Costs vary widely but can range from $300 to $1,000 or more, depending on whether the control module needs replacement or reprogramming.

8. Can a P0604 code be caused by a low battery on a Pontiac?

Yes, a weak or failing battery can lead to voltage fluctuations that may trigger the P0604 code.

9. Do I need to replace the control module if I get a P0604 code on my Pontiac?

Not always; the issue could be caused by wiring or software problems. The control module should only be replaced if it's confirmed to be faulty after proper diagnosis.

10. Can I clear the P0604 code on my Pontiac without repairs?

Clearing the code without addressing the underlying issue may temporarily remove the warning, but the problem is likely to recur and affect vehicle performance.