AutoCodes – Saab – P1603 Saab

P1603 Saab Code - Engine Control Module Defective

Quick Answer

Battery positive voltage is supplied to the Engine Control Module (ECM) even when the ignition switch is OFF for use by the Diagnostic Trouble Code (DTC) memory and air–fuel ratio adaptive control value memory, etc. 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: P1603 Saab indicates Engine Control Module Defective.
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 2,371

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1603 Saab Description

OBDII Code P1603 Saab - Engine Control Module Defective - AutoCodes.com — P1603 Saab Code - Engine Control Module Defective

What does this mean?

What are the Possible Causes of the DTC P1603 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 P1603 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 P1603 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.

Need more information about the P1603 Saab 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 P1603 Saab Code

1. What are the common symptoms of OBDII code P1603 in a Saab?

The common symptoms of OBDII code P1603 in a Saab include engine stalling, rough idling, poor acceleration, and the illumination of the check engine light.

2. What does the OBDII code P1603 for a Saab indicate?

OBDII code P1603 for a Saab indicates a malfunction in the Engine Control Module (ECM), suggesting that the ECM may be defective.

3. What are the possible causes of OBDII code P1603 in a Saab?

Possible causes of OBDII code P1603 in a Saab include a faulty ECM, damaged wiring or connectors related to the ECM, or a software issue within the ECM.

4. How can I diagnose the OBDII code P1603 in my Saab?

Diagnosing OBDII code P1603 in a Saab typically involves using a diagnostic scanner to retrieve the code, checking for any other related codes, inspecting the ECM and its connections, and performing further testing as needed.

5. Can I still drive my Saab with OBDII code P1603?

It is not recommended to drive your Saab with OBDII code P1603, as a defective ECM can lead to potential safety hazards and further damage to the vehicle if left unresolved.

6. How can I repair OBDII code P1603 in a Saab?

Repairing OBDII code P1603 in a Saab usually involves replacing the defective ECM, repairing any damaged wiring or connectors, and ensuring that the ECM software is up to date.

7. Is it possible to reset OBDII code P1603 in a Saab without fixing the issue?

Resetting OBDII code P1603 without fixing the underlying issue, such as a defective ECM, may temporarily turn off the check engine light but will not solve the problem in the long term.

8. How much does it typically cost to repair OBDII code P1603 in a Saab?

The cost to repair OBDII code P1603 in a Saab can vary depending on the extent of the issue and the specific repairs needed, but it may range from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast fix OBDII code P1603 in a Saab?

While some DIY enthusiasts may have the skills to diagnose and replace an ECM, fixing OBDII code P1603 in a Saab often requires specialized tools and knowledge best handled by a professional mechanic.

10. How can I prevent OBDII code P1603 from occurring in my Saab?

To prevent OBDII code P1603 in your Saab, it's essential to maintain your vehicle regularly, address any check engine light promptly, and ensure that the ECM and related components are in good working condition.