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P0843 2017 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 1 Circuit High Voltage

Quick Answer

The P0843 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Transmission Fluid Pressure Switch 1 Circuit High Voltage. Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning 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
P0843 2017 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 1 Circuit High Voltage.
Common causes
Common causes include Faulty transmission fluid pressure switch, Wiring issues or shorts in the circuit, Malfunctioning 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 15, 2024
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Code P0843 2017 Chevrolet Silverado Description

The P0843 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Transmission Fluid Pressure Switch 1 Circuit High 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 a high voltage signal, it triggers the P0843 code.

OBDII Code P0843 2017 Chevrolet Silverado - Transmission Fluid Pressure Switch 1 Circuit High Voltage
P0843 2017 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 1 Circuit High Voltage

Common Causes of P0843 2017 Chevrolet Silverado

  1. Faulty transmission fluid pressure switch
  2. Wiring issues or shorts in the circuit
  3. Malfunctioning transmission control module
  4. Low transmission fluid levels
  5. Contaminated or degraded transmission fluid

Symptoms of P0843 2017 Chevrolet Silverado

  1. Harsh or delayed shifting
  2. Slipping gears
  3. Transmission overheating
  4. Transmission warning light illuminated on the dashboard
  5. Loss of power or acceleration

How to Fix P0843 2017 Chevrolet Silverado

  1. Begin by conducting a thorough diagnostic scan to confirm the P0843 code and identify the specific cause of the issue.
  2. Inspect the transmission fluid pressure switch and its wiring for any signs of damage or corrosion. Replace the switch if necessary.
  3. Check the transmission control module for any faults or errors. Reset or replace the module as needed.
  4. Ensure that the transmission fluid levels are adequate and that the fluid is clean and in good condition. Perform a transmission fluid flush and refill if required.
  5. Clear the DTC from the vehicle's computer system and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0843 2017 Chevrolet Silverado

The typical repair costs for addressing a P0843 code on a 2017 Chevrolet Silverado can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of a new transmission fluid pressure switch, potential wiring repairs, and labor charges. It's important to note that the actual repair costs can vary based on the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It is advisable to obtain quotes from multiple shops to ensure a competitive price for the repair.

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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.

Frequently Asked Questions about P0843 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0843 in a 2017 Chevrolet Silverado?

The common symptoms of OBDII code P0843 in a 2017 Chevrolet Silverado include harsh shifting, transmission slippage, and a lit Check Engine Light.

2. What does the OBDII code P0843 on a 2017 Chevrolet Silverado indicate?

The OBDII code P0843 on a 2017 Chevrolet Silverado indicates a high voltage condition in Transmission Fluid Pressure Switch 1 Circuit.

3. What are the possible causes of OBDII code P0843 in a 2017 Chevrolet Silverado?

Possible causes of OBDII code P0843 in a 2017 Chevrolet Silverado include a faulty transmission fluid pressure switch, damaged wiring or connectors, low transmission fluid levels, or internal transmission issues.

4. How can I diagnose the OBDII code P0843 in my 2017 Chevrolet Silverado?

Diagnosing OBDII code P0843 in a 2017 Chevrolet Silverado involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors for any damage, checking the transmission fluid level and condition, and testing the transmission fluid pressure switch.

5. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P0843?

It is not recommended to continue driving your 2017 Chevrolet Silverado with OBDII code P0843 as it can lead to further transmission damage and potential safety hazards. It is advised to have the issue diagnosed and repaired promptly.

6. How can I repair OBDII code P0843 in my 2017 Chevrolet Silverado?

Repairing OBDII code P0843 in a 2017 Chevrolet Silverado may involve replacing the faulty transmission fluid pressure switch, repairing any damaged wiring or connectors, ensuring proper transmission fluid levels, and addressing any internal transmission problems.

7. Are there any DIY fixes for OBDII code P0843 in a 2017 Chevrolet Silverado?

While some basic inspections like checking the transmission fluid level can be done by DIY enthusiasts, diagnosing and repairing OBDII code P0843 typically requires specialized tools and knowledge, so it is recommended to seek professional help for this issue.

8. How much does it cost to repair OBDII code P0843 in a 2017 Chevrolet Silverado?

The cost of repairing OBDII code P0843 in a 2017 Chevrolet Silverado can vary depending on the exact cause of the issue, labor costs in your area, and the prices of replacement parts. It is advisable to get a diagnostic and repair estimate from a qualified mechanic.

9. Can a faulty transmission fluid pressure switch cause other transmission problems besides triggering OBDII code P0843?

Yes, a faulty transmission fluid pressure switch can cause other transmission issues such as erratic shifting, transmission slipping, and poor overall performance. It is essential to address this problem promptly to prevent further damage.

10. Is OBDII code P0843 a common issue in 2017 Chevrolet Silverado vehicles?

While OBDII code P0843 related to the Transmission Fluid Pressure Switch 1 Circuit High Voltage is not as common as some other codes, it can still occur in 2017 Chevrolet Silverado vehicles due to various factors like wear and tear, electrical issues, or fluid leaks.

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