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P1623 Saab Code - CAN Data Bus Transmission Control Module

Quick Answer

The P1623 code for Saab vehicles refers to an issue with the CAN data bus transmission control module. Common causes include Wiring or connector issues, Faulty transmission control module, Malfunctioning CAN bus system. 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
P1623 Saab indicates CAN Data Bus Transmission Control Module.
Common causes
Common causes include Wiring or connector issues, Faulty transmission control module, Malfunctioning CAN bus system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1623 Saab Description

The P1623 code for Saab vehicles refers to an issue with the CAN data bus transmission control module. The Controller Area Network (CAN) is a communication network that allows various modules within a vehicle to communicate with each other. The transmission control module is responsible for managing the transmission system, including shifting gears and controlling the vehicle's speed.

OBDII Code P1623 Saab - CAN Data Bus Transmission Control Module
P1623 Saab Code - CAN Data Bus Transmission Control Module

Common Causes of P1623 Saab

  1. Wiring or connector issues
  2. Faulty transmission control module
  3. Malfunctioning CAN bus system
  4. Software glitch in the vehicle's computer system

Symptoms of P1623 Saab

  1. Erratic shifting behavior
  2. Transmission slippage
  3. Transmission failure to engage
  4. Decreased fuel efficiency
  5. Poor overall performance

How to Fix P1623 Saab

  1. Conduct a thorough diagnostic scan to retrieve the P1623 code and pinpoint the exact cause of the issue.
  2. Inspect the wiring and connectors related to the transmission control module and CAN bus system for any signs of damage or corrosion.
  3. Test the transmission control module to determine if it is functioning correctly or needs to be replaced.
  4. Check for any software updates or glitches in the vehicle's computer system that may be causing communication errors.
  5. Clear the code from the vehicle's computer system after completing the necessary repairs and conduct a test drive to ensure the issue has been resolved.

Cost to Fix P1623 Saab

The typical repair costs for addressing a P1623 code on a Saab vehicle can range from $200 to $800, depending on the exact cause of the issue and the cost of parts and labor. It's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. To get a more precise estimate, it's recommended to inquire with local auto repair shops.

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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 P1623 Saab Code

1. What are the common symptoms of OBDII code P1623 on a Saab related to the CAN Data Bus Transmission Control Module?

- Common symptoms include transmission shifting issues, rough idle, stalling, and in some cases, the vehicle may not start.

2. What are the possible causes of OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- The code can be triggered by faults in the transmission control module, wiring issues, faulty CAN data bus circuits, or a malfunctioning powertrain control module.

3. How can I diagnose the OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking for other related trouble codes, inspecting the wiring and connectors, and testing the transmission control module and related components.

4. Can I still drive my Saab with an active OBDII code P1623 related to the CAN Data Bus Transmission Control Module?

- It is not recommended to drive the vehicle with an active P1623 code as it can lead to further damage to the transmission or other components. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty sensors or control modules, ensuring proper connections, and conducting a thorough inspection of the transmission system.

6. Is it necessary to reset the OBDII code P1623 in a Saab after fixing the issue with the CAN Data Bus Transmission Control Module?

- Yes, it is recommended to reset the code after resolving the underlying problem. This can be done with an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

7. Are there any common mistakes to avoid when dealing with OBDII code P1623 in a Saab related to the CAN Data Bus Transmission Control Module?

- One common mistake is overlooking the importance of thoroughly inspecting the wiring and connections, as issues in these areas are often the root cause of the problem.

8. How much does it typically cost to repair OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- The cost of the repair can vary depending on the exact cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast with moderate automotive knowledge fix OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- While some aspects of diagnosing and repairing the issue may be possible for a DIY enthusiast, dealing with transmission control module and wiring issues may require specialized tools and expertise. It's best to consult a professional mechanic for complex repairs.

10. How long does it usually take to repair OBDII code P1623 in a Saab's CAN Data Bus Transmission Control Module?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the mechanic's experience. It can range from a few hours to a full day, so it's advisable to plan accordingly.

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