P0803 Fault Code

1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0803 code indicates a malfunction in the Upshift (Skip Shift) Solenoid Control Circuit. This solenoid is responsible for controlling the automatic transmission's ability to skip gears during upshifts. A failure in the circuit can lead to various performance issues and affect the overall drivability of the vehicle.

What are the symptoms of the P0803 code?

• Transmission may not shift as expected
• Engine may experience a drop in performance
• Increased fuel consumption due to improper shifting
• Check Engine Light (CEL) illumination
• Potential difficulty in shifting gears

What causes the P0803 code?

• Faulty upshift solenoid
• Damaged wiring or connectors in the control circuit
• Short or open circuit conditions
• Failed transmission control module (TCM)
• Poor connections or corrosion in electrical connectors

How to fix P0803?

• Inspect and test the upshift solenoid for proper operation
• Check for damaged wiring or connections and repair as necessary
• Use a diagnostic scanner to check for additional fault codes
• Clear any existing codes and perform a road test to ensure proper functionality
• If necessary, replace the transmission control module (TCM)