P0843 2018 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 1 Circuit High Voltage
Quick Answer
The P0843 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Transmission Fluid Pressure Switch 1 Circuit High Voltage. Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors 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
- P0843 2018 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 1 Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Damaged wiring or connectors 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0843 2018 Chevrolet Silverado Description
The P0843 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Transmission Fluid Pressure Switch 1 Circuit High Voltage. This code indicates that there is an issue with the transmission fluid pressure switch, specifically that the voltage being detected is higher than the specified range. The transmission fluid pressure switch is a crucial component of the vehicle's transmission system, responsible for monitoring and regulating the fluid pressure to ensure smooth gear shifts and overall transmission performance.
Common Causes of P0843 2018 Chevrolet Silverado
- Faulty transmission fluid pressure switch
- Damaged wiring or connectors in the circuit
- Low transmission fluid levels
- Malfunctioning transmission control module
- Electrical issues in the transmission system
Symptoms of P0843 2018 Chevrolet Silverado
- Erratic shifting patterns
- Harsh gear changes
- Slipping gears
- Transmission overheating
- Illuminated Check Engine Light
How to Fix P0843 2018 Chevrolet Silverado
- Begin by performing a thorough diagnostic scan to confirm the P0843 code and identify the specific cause of the issue.
- Inspect the transmission fluid pressure switch, wiring, and connectors for any signs of damage or corrosion. Replace any faulty components.
- Check the transmission fluid level and quality. Top up or replace the fluid if necessary.
- Test the transmission control module for proper functioning and reprogram or replace it if needed.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0843 2018 Chevrolet Silverado
The typical repair costs for addressing the P0843 code on a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it is important to note that the actual cost may vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to consult with local auto repair shops to obtain a more accurate estimate for this repair.
Need more information about the P0843 2018 Chevrolet Silverado code?
Need more information on how to fix the P0843 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0843 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0843 2018 Chevrolet Silverado Code
1. What does the OBDII code P0843 mean on a 2018 Chevrolet Silverado?
P0843 indicates a high voltage issue in the Transmission Fluid Pressure Switch 1 Circuit, suggesting a problem with the transmission fluid pressure sensor or its circuit.
2. What are the common symptoms of P0843 in a 2018 Chevrolet Silverado?
Symptoms may include harsh or delayed shifting, the transmission entering limp mode, poor fuel economy, or the Check Engine Light illuminating.
3. What causes the P0843 code on a 2018 Chevrolet Silverado?
Common causes include a faulty transmission fluid pressure sensor, damaged or shorted wiring in the sensor circuit, a bad connector, or a malfunctioning transmission control module (TCM).
4. Can I drive my 2018 Chevrolet Silverado with the P0843 code?
While the vehicle may still be drivable, continuing to drive with this code can cause further transmission damage or unsafe driving conditions. Prompt diagnosis and repair are recommended.
5. How is the P0843 code diagnosed on a 2018 Chevrolet Silverado?
A mechanic will check the sensor wiring, inspect the connector for damage, test the sensor’s voltage and resistance, and use a scan tool to monitor transmission fluid pressure readings.
6. How do you fix the P0843 code on a 2018 Chevrolet Silverado?
Repairs may involve replacing the transmission fluid pressure sensor, repairing damaged wiring or connectors, or reprogramming the transmission control module if necessary.
7. How much does it cost to repair the P0843 code on a 2018 Chevrolet Silverado?
Repair costs vary but typically range from $150 to $400, depending on whether the issue is with the sensor, wiring, or other components.
8. Can low transmission fluid cause the P0843 code on a 2018 Chevrolet Silverado?
Low or contaminated transmission fluid is unlikely to directly cause P0843, but it can contribute to transmission issues. Always ensure proper fluid levels and quality.
9. Does the P0843 code mean my transmission is failing?
Not necessarily. P0843 often points to an electrical or sensor issue rather than complete transmission failure, but it should be addressed promptly to prevent further damage.
10. Can I clear the P0843 code without fixing the problem on my 2018 Chevrolet Silverado?
Clearing the code without fixing the issue may temporarily turn off the Check Engine Light, but the problem will likely return and could cause further damage over time.
Discuss the causes and fixes for P0843 2018 Chevrolet Silverado OBDII Code
Code P0843 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.