P0842 2018 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage
Quick Answer
The P0842 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Transmission Fluid Pressure Switch 1 Circuit Low Voltage. Common causes include Faulty transmission fluid pressure switch: The pressure switch itself may be malfunctioning, causing the low voltage in the circuit, Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the pressure switch, Transmission control module (TCM) malfunction: A malfunctioning TCM can also lead to low voltage in the transmission fluid pressure switch circuit. 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 2018 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch: The pressure switch itself may be malfunctioning, causing the low voltage in the circuit, Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the pressure switch, Transmission control module (TCM) malfunction: A malfunctioning TCM can also lead to low voltage in the transmission fluid pressure switch circuit.
- 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 2018 Chevrolet Silverado Description
The P0842 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Transmission Fluid Pressure Switch 1 Circuit Low Voltage. This code indicates that there is an issue with the transmission fluid pressure switch circuit, specifically that the voltage is lower than expected. The transmission fluid pressure switch is a crucial component that helps regulate the transmission fluid pressure within the transmission system. When the voltage is too low, it can lead to improper shifting, reduced fuel efficiency, and potential damage to the transmission system.
Common Causes of P0842 2018 Chevrolet Silverado
- Faulty transmission fluid pressure switch: The pressure switch itself may be malfunctioning, causing the low voltage in the circuit.
- Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the pressure switch.
- Transmission control module (TCM) malfunction: A malfunctioning TCM can also lead to low voltage in the transmission fluid pressure switch circuit.
- Low transmission fluid level: Insufficient transmission fluid can impact the pressure within the transmission system, triggering this code.
- Electrical issues: Other electrical problems within the vehicle's system can also contribute to low voltage in the circuit.
Symptoms of P0842 2018 Chevrolet Silverado
- Harsh or delayed shifting: The vehicle may experience harsh or delayed shifting between gears, impacting the overall driving experience.
- Transmission slipping: The transmission may slip, causing a lack of power or acceleration when driving.
- Illuminated check engine light: The check engine light may illuminate on the dashboard, indicating a potential issue with the transmission system.
- Reduced fuel efficiency: A decrease in fuel efficiency may occur due to improper transmission fluid pressure regulation.
- Transmission overheating: In severe cases, the transmission may overheat due to the lack of proper fluid pressure regulation.
How to Fix P0842 2018 Chevrolet Silverado
- Diagnose the issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the transmission fluid pressure switch and related components.
- Check wiring connections: Inspect the wiring connections for any damage or corrosion, repairing or replacing as necessary.
- Test the transmission fluid pressure switch: Test the pressure switch to determine if it is functioning correctly, replacing it if needed.
- Inspect the transmission control module: Check the TCM for any malfunctions or errors, addressing any issues found.
- Clear the DTC: After completing the repairs, clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0842 2018 Chevrolet Silverado
The typical repair costs for addressing the P0842 code on a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's essential to note that 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. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. For a more precise estimate, it's recommended to check local rates before proceeding with the repair.
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