Engine-Codes.com
Engine-Codes – GMC – P0877 2014 GMC Sierra

P0877 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

Quick Answer

The P0877 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Transmission Fluid Pressure Switch 4 Circuit Low Voltage. Common causes include Faulty transmission fluid pressure switch, Wiring issues in the circuit, Malfunctioning transmission control module (TCM). 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 2014 GMC Sierra indicates Transmission Fluid Pressure Switch 4 Circuit Low Voltage.
Common causes
Common causes include Faulty transmission fluid pressure switch, Wiring issues in the circuit, Malfunctioning transmission control module (TCM).
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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0877 2014 GMC Sierra Description

The P0877 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Transmission Fluid Pressure Switch 4 Circuit Low Voltage. This code indicates that there is an issue with the transmission fluid pressure switch circuit, specifically with switch 4, where the voltage is lower than the expected range. The transmission fluid pressure switch is a crucial component in automatic transmissions, as it helps regulate the pressure of the transmission fluid, ensuring smooth gear shifts and optimal performance.

OBDII Code P0877 2014 GMC Sierra - Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

Common Causes of P0877 2014 GMC Sierra

  1. Faulty transmission fluid pressure switch
  2. Wiring issues in the circuit
  3. Malfunctioning transmission control module (TCM)
  4. Low transmission fluid level
  5. Contaminated or degraded transmission fluid

Symptoms of P0877 2014 GMC Sierra

  1. Erratic shifting or delayed gear changes
  2. Harsh or rough shifting
  3. Slipping gears
  4. Transmission overheating
  5. Illumination of the Check Engine Light

How to Fix P0877 2014 GMC Sierra

  1. Begin by diagnosing the specific cause of the low voltage in the transmission fluid pressure switch circuit using a diagnostic scanner.
  2. Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the transmission fluid pressure switch to determine if it is functioning correctly. Replace the switch if it is faulty.
  4. Check the transmission fluid level and condition. Top up or replace the fluid if needed.
  5. Clear the DTC and test drive the vehicle to ensure that the issue has been resolved and that the transmission is operating smoothly.

Cost to Fix P0877 2014 GMC Sierra

The typical repair costs for addressing a P0877 code in a 2014 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new transmission fluid pressure switch, can range from $50 to $150. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total cost of the repair can therefore range from $150 to $500, depending on the extent of the issue and the specific repairs needed. It is advisable to consult with a professional mechanic to obtain a more accurate estimate based on the specific circumstances of the vehicle.

Need more information about the P0877 2014 GMC Sierra code?

Need more information on how to fix the P0877 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0877 2014 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 P0877 2014 GMC Sierra Code

1. What does the OBDII code P0877 mean on a 2014 GMC Sierra?

Code P0877 indicates that the transmission control module (TCM) has detected a low voltage condition in the transmission fluid pressure switch 4 circuit.

2. What are the common symptoms of a P0877 code in a 2014 GMC Sierra?

Symptoms may include harsh or erratic shifting, transmission slipping, failure to engage certain gears, and activation of the check engine light.

3. What causes the P0877 code on a GMC Sierra?

Common causes include a faulty transmission fluid pressure sensor, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module (TCM).

4. Can low transmission fluid trigger the P0877 code?

Yes, low transmission fluid can cause insufficient pressure, leading to the P0877 code being triggered.

5. How do you diagnose the P0877 code on a 2014 GMC Sierra?

Diagnosing involves checking the transmission fluid level and condition, inspecting the wiring and connectors in the circuit, testing the pressure sensor, and scanning the TCM for additional codes.

6. Is it safe to drive with a P0877 code on a GMC Sierra?

Driving with a P0877 code is not recommended, as it can lead to further transmission damage and unsafe driving conditions due to erratic shifting.

7. How do you fix a P0877 code on a 2014 GMC Sierra?

Repairs may include replacing the transmission fluid pressure sensor, repairing or replacing damaged wiring or connectors, refilling or flushing the transmission fluid, or reprogramming the TCM.

8. How much does it cost to repair a P0877 code on a GMC Sierra?

Repair costs can range from $100 to $500 or more, depending on whether the issue is with the sensor, wiring, or TCM, and labor rates in your area.

9. Can a faulty TCM cause the P0877 code?

Yes, a malfunctioning transmission control module can fail to properly regulate the pressure circuit, leading to the P0877 code.

10. Will clearing the code fix the P0877 issue on a GMC Sierra?

Clearing the code without addressing the root cause will not fix the problem, and the code is likely to return. Proper diagnosis and repair are required.

Discuss the causes and fixes for P0877 2014 GMC Sierra OBDII Code

Submit a New Comment

Code P0877 2014 GMC Sierra comments

No comments found for this page.