AutoCodes – Saab – P1602 Saab

P1602 Saab Code - Engine Control Module Supply Voltage Low From Battery

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: P1602 Saab indicates Engine Control Module Supply Voltage Low From Battery.
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 2,667

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 P1602 Saab Description

OBDII Code P1602 Saab - Engine Control Module Supply Voltage Low From Battery - AutoCodes.com — P1602 Saab Code - Engine Control Module Supply Voltage Low From Battery

What does this mean?

What are the Possible Causes of the DTC P1602 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 P1602 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 P1602 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 P1602 Saab code?

Need more information on how to fix the P1602 Saab code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1602 Saab code diagnosed by a professional: Find a repair shop in your area

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 P1602 Saab Code

1. What are the common symptoms of OBDII code P1602 in a Saab?

- Common symptoms include engine stalling, rough idling, poor acceleration, and the illumination of the Check Engine light.

2. What could cause the OBDII code P1602 in a Saab?

- The code P1602 in a Saab is typically caused by a low supply voltage from the battery to the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P1602 in my Saab?

- To diagnose the issue, you can start by checking the battery voltage, inspecting the battery connections, and testing the alternator for proper operation.

4. Can a weak battery be the reason behind OBDII code P1602 in a Saab?

- Yes, a weak or failing battery can lead to insufficient supply voltage to the ECM, triggering the P1602 code in a Saab.

5. What are some repair tips for resolving OBDII code P1602 in a Saab?

- Repair tips include checking and replacing the battery if necessary, inspecting and cleaning the battery terminals, and ensuring proper voltage output from the alternator.

6. Is it safe to continue driving my Saab with OBDII code P1602 present?

- It is not recommended to drive your Saab with the P1602 code active, as it can lead to further engine issues and potential breakdowns.

7. Can a DIY enthusiast fix OBDII code P1602 in a Saab?

- Depending on your skill level and access to tools, resolving the P1602 code may be possible for a DIY enthusiast by addressing battery and connection issues.

8. How much does it typically cost to repair OBDII code P1602 in a Saab at a mechanic?

- The cost of repairing the P1602 code in a Saab can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.

9. Will resetting the OBDII code P1602 in my Saab make it go away permanently?

- Simply resetting the code may temporarily clear the Check Engine light, but if the underlying issue of low supply voltage is not fixed, the code is likely to return.

10. Are there any preventive measures to avoid OBDII code P1602 recurrence in a Saab?

- Regularly checking the battery health, keeping terminals clean, and ensuring proper charging system function can help prevent the recurrence of the P1602 code in a Saab.