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P0872 2017 GMC Sierra Code - Transmission Fluid Pressure Switch 3 Circuit Low Voltage

Quick Answer

The P0872 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 3 Circuit Low Voltage. Common causes include Faulty wiring or connectors in the transmission fluid pressure switch circuit, Malfunctioning transmission fluid pressure switch, 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
P0872 2017 GMC Sierra indicates Transmission Fluid Pressure Switch 3 Circuit Low Voltage.
Common causes
Common causes include Faulty wiring or connectors in the transmission fluid pressure switch circuit, Malfunctioning transmission fluid pressure switch, 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 07, 2024
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Code P0872 2017 GMC Sierra Description

The P0872 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 3 Circuit Low Voltage. This code specifically relates to the transmission system in the vehicle. The transmission fluid pressure switch is responsible for monitoring the hydraulic pressure within the transmission. When the switch detects low voltage in the circuit, it triggers the P0872 code. This issue can potentially lead to a variety of transmission problems, affecting the vehicle's performance and drivability.

OBDII Code P0872 2017 GMC Sierra - Transmission Fluid Pressure Switch 3 Circuit Low Voltage
P0872 2017 GMC Sierra Code - Transmission Fluid Pressure Switch 3 Circuit Low Voltage

Common Causes of P0872 2017 GMC Sierra

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

Symptoms of P0872 2017 GMC Sierra

  1. Erratic shifting behavior
  2. Harsh gear changes
  3. Transmission slippage
  4. Delayed engagement when shifting gears
  5. Illumination of the Check Engine Light

How to Fix P0872 2017 GMC Sierra

  1. Conduct a thorough diagnostic scan to confirm the P0872 code and identify the specific cause of the issue.
  2. Inspect the wiring harness and connectors associated with the transmission fluid pressure switch for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the transmission fluid pressure switch to determine if it is functioning correctly. Replace the switch if faulty.
  4. Check the transmission fluid level and condition. Top up or replace the fluid if necessary.
  5. If the problem persists, further diagnose the transmission control module and related components for any faults or malfunctions.

Cost to Fix P0872 2017 GMC Sierra

The typical repair costs for resolving a P0872 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the parts or components that require replacement. Generally, the cost of repairing this transmission-related problem can range from $200 to $500, including parts and labor. However, it's essential to note that diagnosis time and labor rates at auto repair shops can differ based on various factors. Rates typically range from $80 to $150 per hour, but rates may vary in different locations or at specific types of repair facilities. It's recommended to inquire about 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 P0872 2017 GMC Sierra Code

1. What are common symptoms of OBDII code P0872 on a 2017 GMC Sierra?

Common symptoms include harsh shifting, transmission slippage, transmission overheating, and illuminated warning lights on the dashboard.

2. What does the OBDII code P0872 indicate for a 2017 GMC Sierra?

P0872 indicates a Transmission Fluid Pressure Switch 3 Circuit Low Voltage issue in the vehicle's transmission system.

3. What are possible causes of OBDII code P0872 in a 2017 GMC Sierra?

Possible causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or internal transmission problems.

4. How can I diagnose the OBDII code P0872 in my 2017 GMC Sierra?

Diagnosis involves using a scan tool to read the code, inspecting the transmission fluid level and condition, checking the wiring and connectors related to the pressure switch, and performing a thorough transmission system inspection.

5. Can I continue to drive my 2017 GMC Sierra with OBDII code P0872?

It is not recommended to drive the vehicle with this code present, as it can lead to further transmission damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P0872 in my 2017 GMC Sierra?

Repair options may include replacing the faulty transmission fluid pressure switch, repairing damaged wiring or connectors, ensuring proper transmission fluid levels, and addressing any internal transmission issues as needed.

7. Is it safe to reset the OBDII code P0872 in my 2017 GMC Sierra without fixing the underlying issue?

Resetting the code without addressing the root cause is not advisable, as the problem will likely reoccur, potentially causing more severe transmission issues down the line.

8. Can a DIY enthusiast fix OBDII code P0872 in a 2017 GMC Sierra?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address simpler causes of P0872, such as checking and replacing the transmission fluid pressure switch. However, complex issues may require professional assistance.

9. How much does it cost to repair OBDII code P0872 in a 2017 GMC Sierra?

Repair costs can vary widely depending on the specific cause of the code and whether parts need to be replaced or additional transmission work is required. It's recommended to obtain quotes from reputable mechanics or service centers.

10. How can I prevent OBDII code P0872 from occurring in my 2017 GMC Sierra in the future?

Regular maintenance, including checking and changing transmission fluid as recommended, monitoring for any signs of transmission issues, and addressing problems promptly, can help prevent the recurrence of P0872 and other related codes.

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