Engine-Codes.com
Engine-Codes – Chevrolet – P179B 2015 Chevrolet Silverado

P179B 2015 Chevrolet Silverado Code - Transmission Range State Command Signal Message Counter Incorrect

Quick Answer

The P179B diagnostic trouble code (DTC) indicates that there is an issue with the transmission range state command signal message counter in a 2015 Chevrolet Silverado. Common causes include Faulty transmission range sensor or neutral safety switch, Damaged or corroded wiring or connectors in the transmission range sensor circuit, Malfunctioning transmission control module (TCM). 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 2015 Chevrolet Silverado indicates Transmission Range State Command Signal Message Counter Incorrect.
Common causes
Common causes include Faulty transmission range sensor or neutral safety switch, Damaged or corroded wiring or connectors in the transmission range sensor circuit, Malfunctioning transmission control module (TCM).
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 Oct 21, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P179B 2015 Chevrolet Silverado Description

The P179B diagnostic trouble code (DTC) indicates that there is an issue with the transmission range state command signal message counter in a 2015 Chevrolet Silverado. This code is related to the vehicle's transmission control module (TCM) and the communication between the TCM and the engine control module (ECM). The transmission range sensor, also known as the neutral safety switch, is responsible for indicating the current gear position of the transmission to the TCM. When the TCM detects an inconsistency in the message count or an unexpected value in the signal it receives, it triggers the P179B code.

OBDII Code P179B 2015 Chevrolet Silverado - Transmission Range State Command Signal Message Counter Incorrect
P179B 2015 Chevrolet Silverado Code - Transmission Range State Command Signal Message Counter Incorrect

Common Causes of P179B 2015 Chevrolet Silverado

  1. Faulty transmission range sensor or neutral safety switch.
  2. Damaged or corroded wiring or connectors in the transmission range sensor circuit.
  3. Malfunctioning transmission control module (TCM).
  4. Software issues or glitches in the TCM that require reprogramming.
  5. Low transmission fluid levels or contaminated transmission fluid affecting sensor performance.

Symptoms of P179B 2015 Chevrolet Silverado

  1. Erratic or harsh shifting during acceleration or deceleration.
  2. Inability to shift into certain gears or the vehicle getting stuck in a particular gear.
  3. Transmission slipping or unexpected loss of power.
  4. Warning lights on the dashboard, particularly the check engine light.
  5. Unusual noises from the transmission, such as grinding or whining.

How to Fix P179B 2015 Chevrolet Silverado

  1. Diagnostic Scan: Begin by using an OBD-II scanner to confirm the P179B code and check for any additional codes that may provide more context to the issue.
  2. Visual Inspection: Inspect the wiring and connectors associated with the transmission range sensor for signs of damage, corrosion, or loose connections.
  3. Sensor Testing: Test the transmission range sensor using a multimeter to ensure it is functioning correctly and providing accurate readings.
  4. TCM Reprogramming: If the sensor is functioning properly, consider reprogramming or updating the TCM software to eliminate any potential glitches.
  5. Replace Components: If the sensor or TCM is found to be faulty, replace the necessary components and clear the codes to see if the issue persists.

Cost to Fix P179B 2015 Chevrolet Silverado

The cost to diagnose and repair the P179B code can vary widely based on several factors, including the specific diagnosis time, labor rates, and the parts required. On average, the total cost for repairs can range from $200 to $1,200. This estimate includes parts such as a new transmission range sensor (which can cost between $50 and $150) and labor charges, which typically range from $80 to $150 per hour. In metropolitan areas or at dealerships, labor rates may be higher, while independent shops often offer lower rates. It's advisable to check local rates for a more precise estimate and to obtain quotes from multiple repair shops for comparison.

Need more information about the P179B 2015 Chevrolet Silverado code?

Need more information on how to fix the P179B 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P179B 2015 Chevrolet Silverado 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 P179B 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P179B in a 2015 Chevrolet Silverado?

The common symptoms include transmission shifting issues, hesitation or jerking during gear changes, and the Check Engine light being illuminated.

2. What could cause the OBDII code P179B to appear in a 2015 Chevrolet Silverado?

The code P179B typically indicates that the Transmission Range State Command Signal Message Counter is incorrect, which could be caused by a faulty transmission range sensor, wiring issues, or a problem with the transmission control module.

3. How serious is the OBDII code P179B in a 2015 Chevrolet Silverado?

While the vehicle may still be operable with this code present, ignoring it can lead to further transmission problems and potential safety issues. It is recommended to address the underlying cause promptly.

4. Can I continue driving my 2015 Chevrolet Silverado with the OBDII code P179B active?

It is not advisable to continue driving the vehicle with the code active, as it can lead to potential transmission damage and unsafe driving conditions. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the OBDII code P179B in my 2015 Chevrolet Silverado?

Diagnosing the code P179B typically involves using a professional OBDII scanner to retrieve the specific fault codes and conducting a thorough inspection of the transmission range sensor, wiring, and related components.

6. What are some repair tips for fixing the OBDII code P179B in a 2015 Chevrolet Silverado?

Repair tips may include checking and repairing any damaged wiring, replacing the transmission range sensor if faulty, and resetting the transmission control module to clear the code.

7. Will resetting the OBDII code P179B in my 2015 Chevrolet Silverado make it go away permanently?

Simply resetting the code may temporarily clear it, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is essential to diagnose and repair the root cause of the problem.

8. Can a DIY enthusiast fix the OBDII code P179B in a 2015 Chevrolet Silverado?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the code P179B may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it cost to repair the OBDII code P179B in a 2015 Chevrolet Silverado?

The cost of repairing the code P179B can vary depending on the underlying cause, parts needed, and labor rates. It is advisable to obtain quotes from reputable mechanics or service centers for an accurate estimate.

10. Is the OBDII code P179B a common issue in 2015 Chevrolet Silverado vehicles?

The OBDII code P179B may not be as common as some other codes, but it has been reported in 2015 Chevrolet Silverado vehicles. Proper maintenance and timely repairs can help prevent this issue from occurring.

Discuss the causes and fixes for P179B 2015 Chevrolet Silverado OBDII Code

Submit a New Comment

Code P179B 2015 Chevrolet Silverado comments

No comments found for this page.