AutoCodes – GMC – P176C 2018 GMC Sierra

P176C 2018 GMC Sierra Code - Intermediate Speed Sensor Circuit Low Voltage

Quick Answer

The sensor contains a hall-effect sensor and additional electronics that process the signal. Common causes include Faulty Transmission Intermediate Shaft Speed Sensor, Transmission Intermediate Shaft Speed Sensor harness is open or shorted, Transmission Intermediate Shaft Speed Sensor 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: P176C 2018 GMC Sierra indicates Intermediate Speed Sensor Circuit Low Voltage.
Common causes: Common causes include Faulty Transmission Intermediate Shaft Speed Sensor, Transmission Intermediate Shaft Speed Sensor harness is open or shorted, Transmission Intermediate Shaft Speed Sensor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 307

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P176C 2018 GMC Sierra Description

The sensor contains a hall-effect sensor and additional electronics that process the signal. It detects the change of the strength of the magnetic field caused by the reluctor ring. When the strength changes, the sensor changes the amount of current it consumes. This results in a square wave signal of the current, while the voltage stays constant. The control module detects the frequency in which the current changes, which is proportional to the rotational speed.
The sensor is an input to the control module. The input signal is used to determine the rotational speed of the component, the Diagnostic Trouble Code (DTC) will be set when the reaction Carrier Assembly Transmission Intermediate Speed Sensor is less than 0.25 V for greater than 1 s.

OBDII Code P176C 2018 GMC Sierra - Intermediate Speed Sensor Circuit Low Voltage - AutoCodes.com — P176C 2018 GMC Sierra Code - Intermediate Speed Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P176C 2018 GMC Sierra?

Faulty Transmission Intermediate Shaft Speed Sensor
Transmission Intermediate Shaft Speed Sensor harness is open or shorted
Transmission Intermediate Shaft Speed Sensor circuit poor electrical connection
Faulty Transmission Control Module

How to Fix the DTC P176C 2018 GMC Sierra?

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 P176C 2018 GMC Sierra 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.

Need more information about the P176C 2018 GMC Sierra code?

Need more information on how to fix the P176C 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P176C 2018 GMC Sierra 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 P176C 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P176C on a 2018 GMC Sierra?

The common symptoms of OBDII code P176C (Intermediate Speed Sensor Circuit Low Voltage) on a 2018 GMC Sierra may include issues with shifting gears, hesitation during acceleration, and the inability to engage certain gears.

2. What are the possible causes of OBDII code P176C on a 2018 GMC Sierra?

Possible causes of OBDII code P176C on a 2018 GMC Sierra include a faulty intermediate speed sensor, damaged wiring or connectors in the speed sensor circuit, low transmission fluid levels, or internal transmission issues.

3. How can I diagnose the source of OBDII code P176C on my 2018 GMC Sierra?

To diagnose the source of OBDII code P176C, you can use a diagnostic scanner to retrieve the specific trouble code and then inspect the intermediate speed sensor, check the wiring and connectors for any damage, and ensure the transmission fluid levels are adequate.

4. Can I still drive my 2018 GMC Sierra with OBDII code P176C?

It is not recommended to drive your 2018 GMC Sierra with OBDII code P176C, as the issue may cause further damage to the transmission if left unaddressed. It is best to have the vehicle inspected and repaired as soon as possible.

5. How can I repair OBDII code P176C on my 2018 GMC Sierra?

Repairing OBDII code P176C on a 2018 GMC Sierra may involve replacing the intermediate speed sensor, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, or addressing any internal transmission issues as needed.

6. Is it possible to reset OBDII code P176C on my 2018 GMC Sierra without fixing the underlying issue?

While you can clear the OBDII code P176C from your 2018 GMC Sierra's system using a diagnostic scanner, the issue causing the code will likely persist unless properly addressed. It is recommended to fix the underlying problem to prevent further transmission issues.

7. How much does it typically cost to repair OBDII code P176C on a 2018 GMC Sierra?

The cost to repair OBDII code P176C on a 2018 GMC Sierra can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P176C on a 2018 GMC Sierra?

While some DIY enthusiasts may have the skills to address OBDII code P176C on a 2018 GMC Sierra, it is a complex issue related to the transmission system. It is recommended to seek assistance from a qualified mechanic for proper diagnosis and repair.

9. Will OBDII code P176C on a 2018 GMC Sierra reset on its own?

OBDII code P176C on a 2018 GMC Sierra will not reset on its own. Even if the symptoms temporarily disappear, the code may still be stored in the vehicle's system. It is important to address the underlying issue to prevent further problems.

10. How long does it typically take to repair OBDII code P176C on a 2018 GMC Sierra?

The time needed to repair OBDII code P176C on a 2018 GMC Sierra can vary depending on the specific cause of the issue, the availability of parts, and the mechanic's expertise. In general, it may take a few hours to a full day to complete the repairs.