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Engine-Codes – BMW – P1720 BMW

P1720 BMW Code - CAN Timeout Control Module

Quick Answer

The P1720 BMW code indicates a CAN (Controller Area Network) Timeout Control Module issue. Common causes include Faulty Control Module, Wiring harness issues, Software glitches or updates needed. 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
P1720 BMW indicates CAN Timeout Control Module.
Common causes
Common causes include Faulty Control Module, Wiring harness issues, Software glitches or updates needed.
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 11, 2024
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Code P1720 BMW Description

The P1720 BMW code indicates a CAN (Controller Area Network) Timeout Control Module issue. The Controller Area Network is a bus standard used in automotive systems to allow microcontrollers and devices to communicate with each other without a host computer. The Control Module is responsible for managing various functions within the vehicle, including engine performance, transmission, and other critical systems.

OBDII Code P1720 BMW - CAN Timeout Control Module
P1720 BMW Code - CAN Timeout Control Module

Common Causes of P1720 BMW

  1. Faulty Control Module
  2. Wiring harness issues
  3. Software glitches or updates needed
  4. Communication errors between modules
  5. Faulty CAN bus network

Symptoms of P1720 BMW

  1. Check Engine Light illuminated on the dashboard
  2. Loss of power or acceleration
  3. Erratic shifting or transmission problems
  4. Unresponsive or malfunctioning electronic systems
  5. Vehicle stalling or difficulty starting

How to Fix P1720 BMW

  1. Diagnose the issue using a diagnostic scanner to pinpoint the exact cause of the communication timeout.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Check for any software updates or reprogramming needed for the Control Module or other affected modules.
  4. Test the CAN bus network for any faults or communication errors. Repair or replace any faulty components.
  5. Clear the code from the vehicle's system and test drive to ensure the issue has been resolved.

Cost to Fix P1720 BMW

The typical repair costs for a P1720 BMW code can vary depending on the specific cause of the issue. On average, the repair for this type of problem can range from $200 to $800, including parts and labor. However, it's essential to note that the cost can be higher if the Control Module needs to be replaced or if there are extensive wiring or software issues. Additionally, diagnostic time and labor rates at auto repair shops can vary, so it's advisable to consult with a professional technician for a more accurate estimate based on your vehicle's make and model.

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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 P1720 BMW Code

1. What are the common symptoms of OBDII code P1720 in a BMW related to CAN Timeout Control Module?

The common symptoms include illumination of the Check Engine Light, transmission shifting issues, and possibly a limp mode where the vehicle operates in a reduced power state.

2. What are the possible causes of OBDII code P1720 in a BMW?

Potential causes of this code include faulty wiring or connectors in the CAN bus system, a defective control module, a software issue, or a problem with the vehicle's network communication.

3. How can I diagnose the OBDII code P1720 in a BMW related to the CAN Timeout Control Module?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, checking the wiring and connectors in the CAN bus system, testing the control module, and ensuring proper communication between various vehicle modules.

4. Are there any quick repair tips for fixing OBDII code P1720 in a BMW?

Quick repair tips may include checking and repairing any damaged wiring or connectors in the CAN bus system, resetting the control module, and updating the vehicle's software if necessary.

5. Is it safe to continue driving with OBDII code P1720 in a BMW related to the CAN Timeout Control Module?

It is generally not recommended to continue driving with this code present, as it can lead to further transmission issues or potential damage. It's best to address the problem promptly to avoid more severe problems.

6. Can a DIY enthusiast fix OBDII code P1720 in a BMW at home?

While some simple checks and repairs can be done at home, diagnosing and fixing complex issues related to the CAN Timeout Control Module may require specialized knowledge and tools. Consulting a professional mechanic is often the best course of action.

7. How much does it typically cost to repair OBDII code P1720 in a BMW?

The cost of repair can vary widely depending on the specific cause of the code, labor rates in your area, and whether any parts need to be replaced. It's advisable to get a few quotes from reputable auto repair shops.

8. Can a low battery voltage cause OBDII code P1720 in a BMW?

Yes, a low battery voltage or a weak battery can sometimes lead to communication issues between the control modules in the vehicle, potentially triggering the CAN Timeout Control Module error code.

9. How long does it usually take to repair OBDII code P1720 in a BMW?

The repair time can vary depending on the exact cause of the code and the complexity of the fix. It can range from a quick fix that takes a few hours to a more involved repair that may require a day or more.

10. Is it possible for OBDII code P1720 in a BMW to reoccur after being repaired?

If the underlying issue is not properly addressed, there is a possibility that the code may reappear. Ensuring that all related components are thoroughly inspected and repaired can help prevent a recurrence of the problem.

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