P0842 2015 GMC Sierra Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage
Quick Answer
The P0842 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 1 Circuit Low Voltage. Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts 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
- P0842 2015 GMC Sierra indicates Transmission Fluid Pressure Switch 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts 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.
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Code P0842 2015 GMC Sierra Description
The P0842 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Transmission Fluid Pressure Switch 1 Circuit Low Voltage. This code is specifically related to the transmission system of the vehicle. The transmission fluid pressure switch is responsible for monitoring the hydraulic pressure within the transmission. When the switch detects that the pressure is too low, it triggers the P0842 code.
Common Causes of P0842 2015 GMC Sierra
- Faulty transmission fluid pressure switch
- Wiring issues or shorts in the circuit
- Low transmission fluid levels
- Malfunctioning transmission control module
- Internal transmission problems
Symptoms of P0842 2015 GMC Sierra
- Harsh or delayed shifting
- Slipping gears
- Difficulty engaging gears
- Limp mode activation
- Illumination of the Check Engine Light
How to Fix P0842 2015 GMC Sierra
- Begin by conducting a thorough inspection of the transmission fluid pressure switch and its wiring harness to check for any visible 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 condition, topping it up or performing a fluid flush if necessary.
- Inspect the transmission control module for any signs of damage or malfunction, and reprogram or replace it if needed.
- Clear the DTC from the vehicle's computer using a diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0842 2015 GMC Sierra
The typical repair costs for addressing a P0842 code on a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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