P0872 2018 GMC Sierra Code - Transmission Fluid Pressure Switch 3 Circuit Low Voltage
Quick Answer
The P0872 diagnostic trouble code (DTC) for the 2018 GMC Sierra specifically refers to the Transmission Fluid Pressure Switch 3 Circuit Low Voltage. Common causes include Faulty transmission fluid pressure switch, Wiring or connector issues in the transmission fluid pressure switch circuit, Low transmission fluid levels or poor quality fluid. 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 2018 GMC Sierra indicates Transmission Fluid Pressure Switch 3 Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Wiring or connector issues in the transmission fluid pressure switch circuit, Low transmission fluid levels or poor quality fluid.
- 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 P0872 2018 GMC Sierra Description
The P0872 diagnostic trouble code (DTC) for the 2018 GMC Sierra specifically refers to the Transmission Fluid Pressure Switch 3 Circuit Low Voltage. This code indicates that there is an issue with the transmission fluid pressure switch circuit, resulting in a lower than normal voltage being detected. The transmission fluid pressure switch is a crucial component that helps regulate the transmission fluid pressure within the transmission system. When the voltage in this circuit is too low, it can lead to improper transmission function, potentially causing issues with gear shifting, performance, and overall drivability.
Common Causes of P0872 2018 GMC Sierra
- Faulty transmission fluid pressure switch
- Wiring or connector issues in the transmission fluid pressure switch circuit
- Low transmission fluid levels or poor quality fluid
- Internal transmission problems
- Electronic control module (ECM) malfunction
Symptoms of P0872 2018 GMC Sierra
- Harsh or delayed shifting
- Slipping gears
- Erratic transmission behavior
- Illuminated Check Engine Light
- Decreased fuel efficiency
How to Fix P0872 2018 GMC Sierra
- Begin by conducting a visual inspection of the transmission fluid pressure switch and its wiring harness for any signs of damage or corrosion.
- Test the transmission fluid pressure switch using a multimeter to determine if it is functioning correctly.
- Check the transmission fluid level and quality, topping up or replacing as needed.
- Inspect the wiring harness and connectors for any faults, repairing or replacing as necessary.
- If the issue persists, further diagnostic tests may be required to identify any internal transmission problems or ECM malfunctions.
Cost to Fix P0872 2018 GMC Sierra
The typical repair costs for addressing a P0872 code in a 2018 GMC Sierra can vary depending on the specific cause of the issue. Generally, 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 repairs or diagnostic tests are needed. It's important to factor in the specific diagnosis time and labor rates at auto repair shops, which can vary depending on location and other factors. It's recommended to consult with a professional mechanic for a more accurate cost estimate based on your vehicle's needs.
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