AutoCodes – GMC – P0877 2016 GMC Sierra

P0877 2016 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

Quick Answer

The Transmission Fluid Pressure (TFP) switch 4 is part of the Transmission Control Solenoid Valve Assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. 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: P0877 2016 GMC Sierra indicates Transmission Fluid Pressure Switch 4 Circuit Low Voltage.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
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 Popularity 245

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 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0877 2016 GMC Sierra Description

The Transmission Fluid Pressure (TFP) switch 4 is part of the Transmission Control Solenoid Valve Assembly which has no serviceable parts. The Transmission Control Module (TCM) supplies a signal circuit to the TFP switch 4. The TFP switch 4 has an internal case ground. TFP switch 4 is normally closed or LOW. When oil pressure is present at the TFP switch 4, the switch is open or HIGH. The normal LOW pressure control solenoid 5 controls pressure to the 1-2-3-4 clutch regulator valve. The TCM monitors the TFP switch 4 to determine the position of the 1-2-3-4 clutch regulator valve. When the 1-2-3-4 clutch is commanded OFF, pressure is present on the TFP switch 4. When the 1-2-3-4 clutch is commanded ON, the 1-2-3-4 clutch regulator valve moves and pressure to the TFP switch 4 is exhausted through the 1-2-3-4 clutch regulator valve. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that the TFP switch 4 signal voltage remains LOW after the 1-2-3-4 clutch transitions from a HIGH pressure state to a LOW pressure state. The TCM counts each incident. The DTC sets when 5 counts are accumulated.

OBDII Code P0877 2016 GMC Sierra - Transmission Fluid Pressure Switch 4 Circuit Low Voltage - AutoCodes.com — P0877 2016 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0877 2016 GMC Sierra?

Low transmission fluid level
Dirty transmission fluid
Faulty Transmission Control Solenoid Valve Assembly
Transmission Control Solenoid Valve Assembly harness is open or shorted
Transmission Control Solenoid Valve Assembly circuit poor electrical connection

How to Fix the DTC P0877 2016 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 P0877 2016 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 P0877 2016 GMC Sierra code?

Need more information on how to fix the P0877 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0877 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0877 in a 2016 GMC Sierra?

- Common symptoms include harsh shifting, transmission slipping, and illuminated warning lights on the dashboard.

2. What does OBDII code P0877 indicate in a 2016 GMC Sierra?

- OBDII code P0877 indicates a Transmission Fluid Pressure Switch 4 Circuit Low Voltage issue in the vehicle's transmission system.

3. What are the possible causes of OBDII code P0877 in a 2016 GMC Sierra?

- Possible causes include a faulty transmission fluid pressure switch, damaged wiring or connectors, low transmission fluid level, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code P0877 in my 2016 GMC Sierra?

- Diagnosing the issue involves using an OBDII scanner to retrieve the trouble code, inspecting the transmission fluid pressure switch, checking the wiring and connectors, and performing a transmission fluid level check.

5. Can I continue driving my 2016 GMC Sierra with OBDII code P0877 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further transmission damage and potential safety hazards.

6. How can I repair OBDII code P0877 in my 2016 GMC Sierra?

- Repair involves replacing the faulty transmission fluid pressure switch, repairing any damaged wiring or connectors, ensuring the correct transmission fluid level, and resetting the trouble code with an OBDII scanner.

7. Is it possible to clear OBDII code P0877 in a 2016 GMC Sierra without fixing the underlying issue?

- Clearing the code without fixing the underlying issue is not recommended, as the problem will persist and potentially cause more serious transmission issues in the future.

8. How much does it cost to repair OBDII code P0877 in a 2016 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the issue, but it typically involves parts and labor costs ranging from $200 to $500.

9. Can a DIY enthusiast fix OBDII code P0877 in a 2016 GMC Sierra?

- While some experienced DIY enthusiasts may be able to diagnose and replace the transmission fluid pressure switch, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

10. How often does OBDII code P0877 occur in 2016 GMC Sierra vehicles?

- OBDII code P0877 related to the Transmission Fluid Pressure Switch 4 Circuit Low Voltage is not a common issue in 2016 GMC Sierra vehicles, but it can still occur due to various factors affecting the transmission system.