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P0847 GMC Code - Transmission Fluid Pressure Switch 2 Circuit Low Voltage

Quick Answer

The P0847 GMC code indicates a problem with the Transmission Fluid Pressure Switch 2 Circuit, specifically a low voltage issue. Common causes include Faulty transmission fluid pressure switch, Wiring issues or short circuits in the pressure switch circuit, Faulty 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
P0847 GMC indicates Transmission Fluid Pressure Switch 2 Circuit Low Voltage.
Common causes
Common causes include Faulty transmission fluid pressure switch, Wiring issues or short circuits in the pressure switch circuit, Faulty 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 11, 2024
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Code P0847 GMC Description

The P0847 GMC code indicates a problem with the Transmission Fluid Pressure Switch 2 Circuit, specifically a low voltage issue. This switch is crucial for monitoring the pressure of the transmission fluid, which is essential for proper gear shifting and overall transmission function. When the voltage is too low, it can lead to incorrect pressure readings, causing various transmission-related issues.

OBDII Code P0847 GMC - Transmission Fluid Pressure Switch 2 Circuit Low Voltage
P0847 GMC Code - Transmission Fluid Pressure Switch 2 Circuit Low Voltage

Common Causes of P0847 GMC

  1. Faulty transmission fluid pressure switch
  2. Wiring issues or short circuits in the pressure switch circuit
  3. Faulty transmission control module
  4. Low transmission fluid levels
  5. Internal transmission problems

Symptoms of P0847 GMC

  1. Erratic shifting patterns
  2. Harsh or delayed gear shifts
  3. Transmission slipping
  4. Transmission overheating
  5. Illumination of the Check Engine Light

How to Fix P0847 GMC

  1. Use a diagnostic scanner to identify the specific cause of the low voltage issue in the Transmission Fluid Pressure Switch 2 Circuit.
  2. Inspect the wiring and connectors related to the pressure switch for any damage or corrosion. Repair or replace as needed.
  3. Test the pressure switch itself to determine if it is functioning correctly. Replace if faulty.
  4. Check the transmission control module for any faults or reprogramming needs. Address any issues found.
  5. Clear the diagnostic trouble codes, reset the system, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0847 GMC

The typical repair costs for addressing the P0847 GMC code can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary significantly. It's advisable to inquire about local rates to get a more accurate estimate for your specific situation. Remember that factors like location, vehicle make and model, and the severity of the issue can all impact the final cost of the repair.

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Information for Specific GMC Models

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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