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Engine-Codes – GMC – P0872 GMC

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

Quick Answer

The P0872 GMC code indicates a problem with the Transmission Fluid Pressure Switch 3 Circuit, specifically a low voltage condition. Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning transmission control module. 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 GMC indicates Transmission Fluid Pressure Switch 3 Circuit Low Voltage.
Common causes
Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning transmission control module.
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 09, 2024
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Code P0872 GMC Description

The P0872 GMC code indicates a problem with the Transmission Fluid Pressure Switch 3 Circuit, specifically a low voltage condition. This switch is responsible for monitoring and controlling the fluid pressure within the transmission system. When the voltage detected is lower than the expected range, it can lead to various issues with the transmission's performance.

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

Common Causes of P0872 GMC

  1. Faulty transmission fluid pressure switch
  2. Wiring issues or shorts in the circuit
  3. Malfunctioning transmission control module
  4. Low transmission fluid levels
  5. Clogged transmission fluid filter

Symptoms of P0872 GMC

  1. Erratic or harsh shifting
  2. Transmission slipping
  3. Decreased fuel efficiency
  4. Illuminated check engine light
  5. Transmission overheating

How to Fix P0872 GMC

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to pinpoint the exact problem.
  2. Inspect the wiring and connections related to the Transmission Fluid Pressure Switch 3 Circuit to ensure they are intact and functioning properly.
  3. Test the transmission fluid pressure switch for proper operation and replace it if necessary.
  4. Check and refill the transmission fluid to the appropriate level if it is low.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0872 GMC

The typical repair costs for addressing the P0872 GMC code can range from $200 to $500, depending on the specific cause of the issue and the extent of the repairs needed. This estimate includes the cost of parts and labor. However, it's important to note that the actual costs can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Diagnostic time and labor rates at auto repair shops can vary, typically ranging between $80 and $150 per hour. It's recommended to check with local repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0872 GMC









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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.

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