P179B 2014 GMC Sierra Code - Transmission Range State Command Signal Message Counter Incorrect
Quick Answer
The P179B diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Transmission Range State Command Signal Message Counter is incorrect. Common causes include Faulty transmission range sensor, Wiring issues or poor connections, Malfunctioning TCM or PCM. 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 2014 GMC Sierra indicates Transmission Range State Command Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty transmission range sensor, Wiring issues or poor connections, Malfunctioning TCM or PCM.
- 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 P179B 2014 GMC Sierra Description
The P179B diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Transmission Range State Command Signal Message Counter is incorrect. This code typically points to a communication issue within the vehicle's transmission control module (TCM) or the powertrain control module (PCM). The TCM is responsible for controlling the transmission's shifting behavior based on various inputs, including the transmission range state command signal. When the message counter is incorrect, it means that the TCM is not receiving the expected number of signals from the PCM, which can lead to erratic shifting patterns, transmission slippage, or even a complete failure to shift gears.
Common Causes of P179B 2014 GMC Sierra
- Faulty transmission range sensor
- Wiring issues or poor connections
- Malfunctioning TCM or PCM
- Software glitches or programming errors
- Electrical interference or signal disruption
Symptoms of P179B 2014 GMC Sierra
- Erratic shifting behavior
- Transmission slippage
- Delayed or harsh shifting
- Illuminated check engine light
- Reduced fuel efficiency
How to Fix P179B 2014 GMC Sierra
- Perform a thorough diagnostic scan to confirm the P179B code and identify any other related codes.
- Inspect the wiring harness and connectors for any signs of damage or corrosion. Repair or replace as needed.
- Test the transmission range sensor to ensure it is functioning properly. Replace if faulty.
- Check the TCM and PCM for any software updates or reprogramming that may address the communication issue.
- Clear the DTC and perform a test drive to verify that the issue has been resolved.
Cost to Fix P179B 2014 GMC Sierra
The typical repair costs for addressing a P179B code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, if the issue requires more extensive repairs or component replacements, the cost may increase accordingly.
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Frequently Asked Questions about P179B 2014 GMC Sierra Code
1. What are the common symptoms of OBDII code P179B in a 2014 GMC Sierra?
The common symptoms of OBDII code P179B in a 2014 GMC Sierra include transmission shifting issues, gear slippage, and the vehicle going into limp mode.
2. What does the OBDII code P179B "Transmission Range State Command Signal Message Counter Incorrect" indicate?
The code P179B indicates that the transmission control module has detected an issue with the signal message counter related to the transmission range state command.
3. What are the possible causes of OBDII code P179B in a 2014 GMC Sierra?
Possible causes of OBDII code P179B in a 2014 GMC Sierra include faulty transmission range sensor, damaged wiring or connectors, software issues, or a malfunctioning transmission control module.
4. How can I diagnose the OBDII code P179B in my 2014 GMC Sierra?
Diagnosing OBDII code P179B in a 2014 GMC Sierra involves using a diagnostic scanner to retrieve the code, examining the transmission range sensor, checking for wiring issues, and performing a thorough inspection of the transmission control module.
5. Can I continue driving my 2014 GMC Sierra with OBDII code P179B?
It is not recommended to continue driving your 2014 GMC Sierra with OBDII code P179B, as it can lead to further damage to the transmission system. It's best to address the issue promptly.
6. How can OBDII code P179B in a 2014 GMC Sierra be repaired?
Repairing OBDII code P179B in a 2014 GMC Sierra may involve replacing the transmission range sensor, repairing damaged wiring or connectors, updating software, or replacing the transmission control module if necessary.
7. Is it possible to reset OBDII code P179B in a 2014 GMC Sierra without repairs?
Resetting OBDII code P179B in a 2014 GMC Sierra without addressing the underlying issue may temporarily clear the code, but it is likely to reappear once the problem persists. It's essential to diagnose and repair the root cause.
8. Can a DIY enthusiast fix OBDII code P179B in a 2014 GMC Sierra?
While some aspects of diagnosing and repairing OBDII code P179B may be within reach of a skilled DIY enthusiast, it is recommended to consult a professional mechanic due to the complexity of transmission system issues.
9. How much does it cost to repair OBDII code P179B in a 2014 GMC Sierra?
The cost of repairing OBDII code P179B in a 2014 GMC Sierra can vary depending on the exact cause of the issue, parts needed for replacement, labor costs, and the mechanic's hourly rate. It's best to obtain quotes from different repair shops.
10. Will OBDII code P179B cause my 2014 GMC Sierra to fail an emissions test?
Yes, OBDII code P179B can cause your 2014 GMC Sierra to fail an emissions test, as it indicates a malfunction in the transmission system, which can affect the vehicle's overall performance and emissions output.
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