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Engine-Codes – GMC – P0877 2015 GMC Sierra

P0877 2015 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

Quick Answer

The P0877 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 4 Circuit, specifically low voltage. Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors in the circuit, Low transmission fluid levels. 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 2015 GMC Sierra indicates Transmission Fluid Pressure Switch 4 Circuit Low Voltage.
Common causes
Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors in the circuit, Low transmission fluid levels.
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 13, 2024
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Code P0877 2015 GMC Sierra Description

The P0877 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 4 Circuit, specifically low voltage. This switch is responsible for monitoring and controlling the transmission fluid pressure within the transmission system. When the voltage detected by the switch is lower than the specified threshold, the P0877 code is triggered, indicating a potential issue with the transmission system.

OBDII Code P0877 2015 GMC Sierra - Transmission Fluid Pressure Switch 4 Circuit Low Voltage
P0877 2015 GMC Sierra Code - Transmission Fluid Pressure Switch 4 Circuit Low Voltage

Common Causes of P0877 2015 GMC Sierra

  1. Faulty transmission fluid pressure switch
  2. Damaged wiring or connectors in the circuit
  3. Low transmission fluid levels
  4. Malfunctioning transmission control module
  5. Electrical issues within the transmission system

Symptoms of P0877 2015 GMC Sierra

  1. Harsh or delayed shifting of gears
  2. Transmission slipping
  3. Illumination of the Check Engine Light
  4. Transmission overheating
  5. Decreased fuel efficiency

How to Fix P0877 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the transmission fluid pressure switch and its circuit to identify any visible damage or issues.
  2. Test the transmission fluid pressure switch using a multimeter to determine if it is functioning within the specified voltage range.
  3. Check the wiring and connectors in the circuit for any signs of damage or corrosion, repairing or replacing as necessary.
  4. Verify the transmission fluid levels and top up if low, ensuring it is at the correct level for proper transmission operation.
  5. If the issue persists, consult a professional mechanic or dealership for further diagnosis and potential replacement of the transmission fluid pressure switch or other components.

Cost to Fix P0877 2015 GMC Sierra

The typical repair costs for addressing a P0877 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of replacing a transmission fluid pressure switch can range from $150 to $300, including parts and labor. Additional costs may apply if wiring or connectors need to be repaired or replaced. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate 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 P0877 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P0877 in a 2015 GMC Sierra?

The common symptoms of OBDII code P0877 include harsh shifting, transmission slippage, and the transmission being stuck in a single gear.

2. What is the primary cause of OBDII code P0877 in a 2015 GMC Sierra?

The primary cause of OBDII code P0877 is a malfunction in the transmission fluid pressure switch 4 circuit, leading to low voltage being detected by the vehicle's onboard diagnostic system.

3. How can I diagnose the issue causing OBDII code P0877 in my 2015 GMC Sierra?

Diagnosing the issue causing OBDII code P0877 involves checking the wiring and connections related to the transmission fluid pressure switch 4 circuit, as well as testing the switch itself for proper functionality.

4. Can driving with OBDII code P0877 in a 2015 GMC Sierra cause further damage to the vehicle?

Continuing to drive with OBDII code P0877 in a 2015 GMC Sierra can potentially cause damage to the transmission due to improper fluid pressure regulation, leading to more severe transmission issues over time.

5. How can I repair OBDII code P0877 in a 2015 GMC Sierra?

Repairing OBDII code P0877 involves addressing the root cause of the low voltage detected in the transmission fluid pressure switch 4 circuit, which may require repairing or replacing the switch, checking and repairing any damaged wiring, or addressing faulty connections.

6. Is it safe to continue driving my 2015 GMC Sierra with OBDII code P0877 present?

It is not recommended to continue driving your 2015 GMC Sierra with OBDII code P0877 present, as it can lead to further transmission problems and potential safety hazards on the road.

7. Can I reset OBDII code P0877 in my 2015 GMC Sierra by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it will not solve the underlying issue causing OBDII code P0877. It is essential to diagnose and repair the root cause to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code P0877 in a 2015 GMC Sierra?

The cost to repair OBDII code P0877 in a 2015 GMC Sierra can vary depending on the exact cause of the issue, but it may involve labor costs for diagnosis and repair, as well as potential parts replacement.

9. Can a DIY enthusiast fix OBDII code P0877 in a 2015 GMC Sierra?

While some DIY enthusiasts may have the skills and tools to address OBDII code P0877, it is recommended to consult a professional mechanic or technician for proper diagnosis and repair to ensure the issue is resolved correctly.

10. Will OBDII code P0877 cause my 2015 GMC Sierra to go into limp mode?

In some cases, OBDII code P0877 in a 2015 GMC Sierra can trigger the vehicle's transmission control module to activate limp mode to protect the transmission from further damage due to the detected low voltage in the pressure switch circuit.

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