P179B 2014 Chevrolet Silverado Code - Transmission Range State Command Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection. 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 Chevrolet Silverado indicates Transmission Range State Command Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection.
- 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.
Code P179B 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P179B 2014 Chevrolet Silverado?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P179B 2014 Chevrolet Silverado?
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 P179B 2014 Chevrolet Silverado 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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Frequently Asked Questions about P179B 2014 Chevrolet Silverado Code
1. What does OBDII code P179B mean on a 2014 Chevrolet Silverado?
Code P179B indicates that the Transmission Range State Command Signal Message Counter is incorrect, meaning the transmission control module (TCM) is receiving inconsistent or invalid data related to the transmission range state.
2. What are the symptoms of code P179B in a 2014 Chevy Silverado?
Common symptoms include erratic shifting, the transmission stuck in one gear, failure to shift properly, or the illumination of the check engine light.
3. What causes code P179B to appear in a Chevrolet Silverado?
This code can be caused by faulty wiring or connectors, a malfunctioning transmission range sensor, a defective transmission control module (TCM), or software issues.
4. Can a bad transmission range sensor cause code P179B?
Yes, a faulty transmission range sensor can cause the TCM to receive incorrect data, leading to the P179B error code.
5. Is it safe to drive with code P179B active in a 2014 Silverado?
Driving with this code may not be safe, as it can result in erratic shifting or the transmission failing to operate properly, which could compromise vehicle control.
6. How do you diagnose code P179B on a 2014 Chevrolet Silverado?
Diagnosis typically involves scanning the vehicle with an OBDII scanner, inspecting the transmission range sensor and its wiring, and checking the TCM for faults or software updates.
7. Can a software update fix code P179B in a Chevy Silverado?
In some cases, a TCM software update from the dealership may resolve the issue if it’s related to a known software glitch.
8. What repairs are commonly required to fix code P179B?
Repairs may include replacing the transmission range sensor, repairing or replacing damaged wiring or connectors, or replacing the TCM if it’s defective.
9. How much does it cost to fix code P179B on a 2014 Silverado?
Repair costs can vary widely depending on the exact cause, but replacing a transmission range sensor typically costs between $150 and $400, while TCM replacement can cost $500 to $1,200.
10. Can I clear code P179B without fixing the issue?
Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely return and could lead to further transmission problems.
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