AutoCodes – Saab – P0604 Saab

P0604 Saab Code - Control Module Random Access Memory

Quick Answer

This Diagnostic Trouble Code (DTC) applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) circuit poor electrical connection. 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 Saab indicates Control Module Random Access Memory.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) circuit poor electrical connection.
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 822

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 May 01, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0604 Saab Description

This Diagnostic Trouble Code (DTC) applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). This diagnostic also addresses whether or not the ECM is not programmed.

OBDII Code P0604 Saab - Control Module Random Access Memory - AutoCodes.com — P0604 Saab Code - Control Module Random Access Memory

What does this mean?

What are the Possible Causes of the DTC P0604 Saab?

Faulty Engine Control Module (ECM)
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC P0604 Saab?

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 P0604 Saab 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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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 Saab Code

1. What is OBDII code P0604 for a Saab?

Code P0604 in a Saab indicates a problem with the Control Module Random Access Memory (RAM).

2. What are the common symptoms of OBDII code P0604 in a Saab?

Common symptoms of P0604 may include engine stalling, rough idling, poor acceleration, and difficulty starting the vehicle.

3. What are the possible causes of OBDII code P0604 in a Saab?

Potential causes of code P0604 in a Saab include a faulty engine control module (ECM), wiring issues, low battery voltage, or a software malfunction.

4. How can I diagnose OBDII code P0604 in my Saab?

Diagnosing code P0604 typically involves using a diagnostic scanner to retrieve the code, checking the ECM connections, inspecting wiring for damage, and testing the battery voltage.

5. Can I still drive my Saab with OBDII code P0604?

It is not recommended to drive your Saab with an unresolved P0604 code, as it can lead to further damage to the vehicle and potential safety hazards.

6. How can I repair OBDII code P0604 in my Saab?

Repairing P0604 may involve resetting the ECM, repairing or replacing damaged wiring, ensuring proper battery voltage, or replacing the ECM if necessary.

7. Is it safe to reset the ECM to clear OBDII code P0604 in a Saab?

Resetting the ECM to clear the code is safe, but it may not solve the underlying issue causing code P0604. It is important to diagnose and address the root cause of the problem.

8. Can a software update fix OBDII code P0604 in a Saab?

In some cases, a software update provided by the manufacturer may resolve P0604 if the issue is related to ECM software malfunction.

9. How much does it cost to repair OBDII code P0604 in a Saab?

The cost of repairing P0604 in a Saab can vary depending on the cause of the issue. It may range from a simple wiring repair to replacing the ECM, so it is best to consult a professional for an accurate estimate.

10. How can I prevent OBDII code P0604 from occurring in my Saab?

To prevent code P0604, it is essential to maintain your Saab regularly, ensure the battery is in good condition, and address any ECM-related issues promptly to avoid memory errors.