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P0815 Ford Code - Upshift Switch Circuit Fault

Quick Answer

The P0815 Ford code indicates a fault in the upshift switch circuit of the vehicle. Common causes include Faulty upshift switch, Damaged wiring or connectors in the upshift switch circuit, Corrosion or moisture in the 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
P0815 Ford indicates Upshift Switch Circuit Fault.
Common causes
Common causes include Faulty upshift switch, Damaged wiring or connectors in the upshift switch circuit, Corrosion or moisture in the 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0815 Ford Description

The P0815 Ford code indicates a fault in the upshift switch circuit of the vehicle. This switch is responsible for sending signals to the transmission control module (TCM) to initiate an upshift in the transmission. When this circuit malfunctions, it can lead to issues with the vehicle's shifting performance. The upshift switch is typically located on the gear shifter or the transmission itself, depending on the vehicle's make and model.

OBDII Code P0815 Ford - Upshift Switch Circuit Fault
P0815 Ford Code - Upshift Switch Circuit Fault

Common Causes of P0815 Ford

  1. Faulty upshift switch
  2. Damaged wiring or connectors in the upshift switch circuit
  3. Corrosion or moisture in the circuit
  4. Issues with the TCM
  5. Electrical problems in the transmission system

Symptoms of P0815 Ford

  1. Delayed or harsh upshifting
  2. Inconsistent shifting patterns
  3. Transmission stuck in a lower gear
  4. Illuminated Check Engine Light
  5. Decreased fuel efficiency

How to Fix P0815 Ford

  1. Diagnose the issue using a scan tool to verify the P0815 code and identify the exact cause of the fault.
  2. Inspect the upshift switch and its wiring for any visible damage, corrosion, or loose connections.
  3. Test the upshift switch for proper functionality using a multimeter or other diagnostic tools.
  4. Replace the upshift switch if it is found to be faulty, ensuring the new switch is properly installed and connected.
  5. Clear the trouble code from the TCM's memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0815 Ford

The cost of repairing a P0815 Ford code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing an upshift switch and addressing related wiring or connector issues can range from $200 to $500, including parts and labor. However, prices may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive rates. It is recommended to obtain quotes from multiple repair facilities to determine the most cost-effective solution for your vehicle.

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Information for Specific Ford Models

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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