What is the P0803 fault number? What is the description of 1-4-Upshift Solenoid Control Circuit Failure? How do you fix P0803 fault code What are the symptoms and causes for the P0803 fault code
What is the P0803 Fault code? What does it signify?
Vehicles with manual transmission are exempted from the P0803 fault code. The upshift solenoid stops the driver from deliberately skipping second or three gears. This is a common part in high performance cars and sports cars. The solenoid of the upshift will not allow the driver to shift between first and fourth gear (skipping 2nd and/3rd gear), even though engine speed and speed are not appropriate. If the engine speed is not sufficient, the engine might be unable to handle the skipped gear, slowing down, or even stalling. The purpose of an upshift solenoid in engine and transmission is to protect them from damage caused by incorrect shifting. It also helps improve fuel efficiency. If the powertrain controller module (PCM), detects an excess voltage or resistance from upshift solenoid control circuit, P0803 is set.
Note: Depending on the vehicle manufacturer, P0803 might have a different definition. Refer to the relevant repair manual or database for a complete description of the code.
The P0803 fault code can affect vehicles of all makes and models, including but not limited to: Honda, Dodge, Renault Mercedes-Benz, Chevrolet Mercedes-Benz, Mercedes-Benz. Peugeot, Jeep, BMW.
What is the P0803 Fault Code?
Fault code P0803 is most commonly triggered by:
- – Defective upshift solenoid
- – Defective upshift solenoid relay
- – A blown fuse
- – Defective upshift solenoid actuator (actuator)
- – Damaged wires to upshift solenoid.
- – The PCM has become faulty or requires reprogramming
What are the symptoms for the P0803 fault code?
You may experience the following symptoms if your vehicle has the code P0803.
- – Illumination for the check engine light
- – Continuous illumination of the lamp that indicates the gears.
- – Complete or partial deactivation
How to Fix the P0803 Fault Code
The following repairs may be able to resolve the P0803 fault codes:
- – Replacing a defective upshift solenoid/actuator
- – Repair of damaged wires, connectors, and open or short circuits to the upshift solenoid
- – Replacing an inoperative relay
- – Replacing an blown fuse
- – Reprogramming your PCM
How Serious Is the P0803 Fault Code
You don’t need to be concerned if the P0803 code has been set. Although your vehicle will continue to operate, it can not prevent you from changing gears or upshifting. This can lead to poor fuel efficiency and possibly emission problems.
