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Engine-Codes – GMC – P176C 2017 GMC Sierra

P176C 2017 GMC Sierra Code - Intermediate Speed Sensor Circuit Low Voltage

Quick Answer

The P176C diagnostic trouble code (DTC) on a 2017 GMC Sierra indicates a problem with the intermediate speed sensor circuit, specifically reporting low voltage. Common causes include Faulty intermediate speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit. 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
P176C 2017 GMC Sierra indicates Intermediate Speed Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty intermediate speed sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit.
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 17, 2024
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Code P176C 2017 GMC Sierra Description

The P176C diagnostic trouble code (DTC) on a 2017 GMC Sierra indicates a problem with the intermediate speed sensor circuit, specifically reporting low voltage. The intermediate speed sensor is a crucial component of the vehicle's transmission system, responsible for monitoring the speed of the transmission's input shaft. This information is used by the vehicle's computer to determine the appropriate shift points and ensure smooth operation of the transmission.

OBDII Code P176C 2017 GMC Sierra - Intermediate Speed Sensor Circuit Low Voltage
P176C 2017 GMC Sierra Code - Intermediate Speed Sensor Circuit Low Voltage

Common Causes of P176C 2017 GMC Sierra

  1. Faulty intermediate speed sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. Issues with the transmission control module (TCM)
  5. Electrical issues such as a blown fuse or relay

Symptoms of P176C 2017 GMC Sierra

  1. Erratic shifting behavior
  2. Delayed or harsh shifting
  3. Failure to shift gears properly
  4. Decreased fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix P176C 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the intermediate speed sensor and its wiring harness for any visible damage or corrosion.
  2. Test the intermediate speed sensor using a multimeter to check for proper voltage output.
  3. If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  4. Check and repair any damaged wiring or connectors in the sensor circuit.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P176C 2017 GMC Sierra

The cost of repairing a P176C code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, the price range for parts such as an intermediate speed sensor can be between $50 to $150, while labor costs can range from $100 to $200. Overall, the total repair cost can be estimated to be between $150 to $350. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at the auto repair shop. It's recommended to obtain quotes from local shops for a more accurate cost estimate.

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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 P176C 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P176C in a 2017 GMC Sierra?

- Common symptoms include issues with shifting gears, transmission slipping, poor fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P176C on a 2017 GMC Sierra indicate?

- The code P176C indicates a problem with the intermediate speed sensor circuit showing low voltage in the transmission system.

3. What are the possible causes of OBDII code P176C in a 2017 GMC Sierra?

- Possible causes include a faulty intermediate speed sensor, damaged wiring or connectors in the sensor circuit, low transmission fluid levels, or issues with the transmission control module.

4. How can I diagnose the cause of OBDII code P176C in my 2017 GMC Sierra?

- Diagnosing the issue involves checking the intermediate speed sensor for proper operation, inspecting the sensor circuit for any damage, ensuring the transmission fluid levels are adequate, and scanning the transmission control module for faults.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P176C?

- It is not recommended to continue driving with this code present, as it can lead to further transmission damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P176C in my 2017 GMC Sierra?

- Repairing the code may involve replacing the intermediate speed sensor, repairing damaged wiring or connectors, topping up transmission fluid, or reprogramming the transmission control module.

7. Will resetting the check engine light resolve OBDII code P176C in my 2017 GMC Sierra?

- Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the low voltage in the intermediate speed sensor circuit.

8. How much does it cost to repair OBDII code P176C in a 2017 GMC Sierra?

- The cost of repairs can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I clear OBDII code P176C in my 2017 GMC Sierra with a basic OBDII scanner?

- Yes, a basic OBDII scanner can clear the code, but it is important to diagnose and repair the underlying issue to prevent the code from reoccurring.

10. Is OBDII code P176C a common issue in 2017 GMC Sierra vehicles?

- While it may not be as common as some other OBDII codes, issues with the intermediate speed sensor circuit can occur in 2017 GMC Sierra vehicles, especially with age and mileage.

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