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Engine-Codes – Generic – P0803

P0803 Code - 1-4 Upshift Skip Shift Solenoid Control Circuit Malfunction

Quick Answer

The OBD-II code P0803 indicates a problem with the 1-4 Upshift Skip Shift Solenoid Control Circuit in the vehicle. Common causes include Faulty 1-4 Upshift Skip Shift Solenoid, Wiring issues in the solenoid control circuit, Corrosion or damage to the solenoid connector. 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
P0803 indicates 1-4 Upshift Skip Shift Solenoid Control Circuit Malfunction.
Common causes
Common causes include Faulty 1-4 Upshift Skip Shift Solenoid, Wiring issues in the solenoid control circuit, Corrosion or damage to the solenoid connector.
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 12, 2024
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Code P0803 Description

The OBD-II code P0803 indicates a problem with the 1-4 Upshift Skip Shift Solenoid Control Circuit in the vehicle. This solenoid is responsible for controlling the skipping of gears during the upshift process. When this circuit malfunctions, it can lead to issues with the transmission system, causing erratic shifting patterns and potentially impacting the overall performance of the vehicle.

OBDII Code P0803 - 1-4 Upshift Skip Shift Solenoid Control Circuit Malfunction
P0803 Code - 1-4 Upshift Skip Shift Solenoid Control Circuit Malfunction

Common Causes of P0803

  1. Faulty 1-4 Upshift Skip Shift Solenoid
  2. Wiring issues in the solenoid control circuit
  3. Corrosion or damage to the solenoid connector
  4. Electrical problems in the transmission control module
  5. Fluid contamination in the transmission system

Symptoms of P0803

  1. Erratic shifting patterns
  2. Delayed or harsh upshifts
  3. Illuminated Check Engine Light
  4. Reduced fuel efficiency
  5. Transmission slipping

How to Fix P0803

  1. Begin by diagnosing the exact cause of the issue using a scan tool to retrieve the fault codes and performing a visual inspection of the solenoid and its wiring.
  2. Test the 1-4 Upshift Skip Shift Solenoid to determine if it is functioning correctly, and replace it if necessary.
  3. Inspect the wiring and connectors for any signs of damage or corrosion, repairing or replacing them as needed.
  4. Clear the fault codes from the vehicle's computer and test drive the vehicle to ensure that the issue has been resolved.
  5. Perform a transmission fluid flush and filter replacement if there are signs of contamination or wear.

Cost to Fix P0803

The cost of repairing a P0803 code can vary depending on the extent of the issue and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while the labor costs can range from $100 to $300. Overall, the total repair cost can fall between $150 and $500. It is important to note that these are rough estimates, and the actual costs may differ based on various factors such as location, vehicle make and model, and the mechanic's labor rates. It is recommended to consult with a professional mechanic for a more accurate cost estimate.

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Code P0803 Information for Specific Makes

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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