AutoCodes – Saab – P1623 Saab

P1623 Saab Code - CAN Data Bus Transmission Control Module

Quick Answer

P1623 Saab indicates CAN Data Bus Transmission Control Module. Common causes include Transmission Control Module (TCM) Control Are Network (CAN) communication, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted. 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 Transmission Control Module (TCM) Control Are Network (CAN) communication, Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted.
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 6,396
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 01, 2019
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Code P1623 Saab Description

OBDII Code P1623 Saab - CAN Data Bus Transmission Control Module - AutoCodes.com
P1623 Saab Code - CAN Data Bus Transmission Control Module

What are the Possible Causes of the DTC P1623 Saab?

  • Transmission Control Module (TCM) Control Are Network (CAN) communication
  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module (TCM) harness is open or shorted
  • Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC P1623 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 P1623 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 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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