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Engine-Codes – Generic – P179B

P179B Code - Transmission Range State Command Signal Message Counter Incorrect

Quick Answer

The P179B diagnostic trouble code indicates that the transmission range state command signal message counter is incorrect. Common causes include Faulty transmission range sensor, Malfunctioning transmission control module, Damaged wiring harnesses or connectors. 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
P179B indicates Transmission Range State Command Signal Message Counter Incorrect.
Common causes
Common causes include Faulty transmission range sensor, Malfunctioning transmission control module, Damaged wiring harnesses or connectors.
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 12, 2024
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Code P179B Description

The P179B diagnostic trouble code indicates that the transmission range state command signal message counter is incorrect. In simpler terms, this means that the vehicle's onboard computer system is not receiving the correct information regarding the transmission range state, which can lead to various issues with the vehicle's performance and drivability.

OBDII Code P179B - Transmission Range State Command Signal Message Counter Incorrect
P179B Code - Transmission Range State Command Signal Message Counter Incorrect

Common Causes of P179B

  1. Faulty transmission range sensor
  2. Malfunctioning transmission control module
  3. Damaged wiring harnesses or connectors
  4. Communication errors within the vehicle's network
  5. Software issues with the transmission control module

Symptoms of P179B

  1. Harsh or delayed shifting
  2. Erratic behavior while driving
  3. Transmission slippage
  4. Reduced fuel efficiency
  5. Transmission control module failsafe mode activation

How to Fix P179B

  1. Perform a thorough diagnostic scan to retrieve the P179B code and any related codes.
  2. Inspect the transmission range sensor and its wiring for any damage or corrosion.
  3. Check the transmission control module for proper operation and communication.
  4. Test the vehicle's network communication for any faults or errors.
  5. Clear the code and reset the transmission control module if necessary.

Cost to Fix P179B

The typical repair costs for addressing the P179B code can vary depending on the specific cause of the issue and the extent of repairs needed. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. However, it's important to keep in mind that diagnosis time and labor rates can vary between auto repair shops, with rates typically ranging from $80 to $150 per hour. Be sure to consult with a trusted mechanic or dealership for a more accurate estimate based on your vehicle's make and model.

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Code P179B Information for Specific Makes

  • P179B Buick — Transmission Range State Command Signal Message Counter Incorrect
  • P179B Cadillac — Transmission Range State Command Signal Message Counter Incorrect
  • P179B Chevrolet — Transmission Range State Command Signal Message Counter Incorrect
  • P179B GMC — Transmission Range State Command Signal Message Counter Incorrect
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 P179B Code

1. What are common symptoms of OBDII code P179B?

The common symptoms of OBDII code P179B include issues with shifting gears, transmission slipping, and the vehicle going into limp mode.

2. What can cause the OBDII code P179B to appear?

The OBDII code P179B, Transmission Range State Command Signal Message Counter Incorrect, can be triggered by faulty transmission range sensor, wiring issues, or a malfunctioning transmission control module.

3. How serious is the OBDII code P179B?

The OBDII code P179B should be addressed promptly as it can lead to transmission problems and affect the overall drivability of the vehicle.

4. What should I do if I encounter the OBDII code P179B?

If you encounter the OBDII code P179B, it is recommended to have your vehicle diagnosed by a professional mechanic to pinpoint the exact cause of the issue.

5. Can I continue driving with the OBDII code P179B present?

It is not advisable to continue driving with the OBDII code P179B present as it can potentially cause further damage to the transmission.

6. How can the OBDII code P179B be repaired?

Repairing the OBDII code P179B involves diagnosing the root cause of the issue, which can range from replacing the transmission range sensor to repairing faulty wiring or addressing issues with the transmission control module.

7. Is it possible to reset the OBDII code P179B on my own?

While you can attempt to clear the OBDII code P179B using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it cost to repair the OBDII code P179B?

The cost of repairing the OBDII code P179B can vary depending on the exact cause of the issue and the labor rates of the repair shop. It is recommended to obtain quotes from multiple mechanics for an accurate estimate.

9. Can a DIY enthusiast fix the OBDII code P179B?

Repairing the OBDII code P179B may require specialized knowledge and tools, making it more suitable for professional mechanics. However, DIY enthusiasts with experience in automotive repair may be able to tackle the issue with the right resources.

10. Will the OBDII code P179B cause my vehicle to fail an emissions test?

The OBDII code P179B can potentially cause your vehicle to fail an emissions test, as it indicates a malfunction in the transmission system. It is important to address the issue promptly to ensure your vehicle meets emissions standards.

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