Q: My traction control is off and half of the engine doesn't work, I hooked up a computer to it and the P0800 code is on

asked by on October 31, 2016

Half of my engine isn't working properly, I can barely drive on it, it shows the P0800 code is on, but I have no idea on how to fix it, can you send me list of steps that I have to do?

My car has 110000 miles.
My car has an automatic transmission.

Hello, thanks for writing in. P0800 is the trouble code for an issue with the vehicle’s Transfer Case Control system. When the transfer case control module, a computer that is separate from the engine computer, detects an issue with the transfer case systems circuits, or sensors it will send a signal to the engine computer to set off the light.

This can be caused by a few different things. The most common causes are issues with one or more of the 4WD/AWD system’s sensors, actuators, or a wiring issue. As P0800 is a general code, and only indicates that there is some sort of fault, not what the exact fault is.

If there are no other trouble codes present to help identify the specific issue then the vehicle will have to be diagnosed in order to determine what the exact problem is. If you’d like to have this done, consider YourMechanic, as one of our mobile technicians can come to your home or office to diagnose the trouble code further and help you make the necessary repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car stops slower & brake pedal goes to floor

Sounds like you may have some internal leakage in the brake master cylinder. The brake master cylinder, if it is leaking internally, will maintain fluid level and allow the pedal to drop. It is possible that the leak is small...

Airbag & seat belt signs come on and off continually

Hello there, A few different problems can cause airbags faults such as these. The most common problems are with the seat passenger sensor, wiring, or the seatbelt pretensioner. The wiring for the seatbelt can be very sensitive and any change...

Had timing chains replaced, check engine light continues to come on

Hello. If the Check Engine Light has come on, I would take the vehicle back to the dealership and have them take care of the issue. As all of your issues only began after their major service, they should be...

Related articles

P0387 OBD-II Trouble Code: Crankshaft Position Sensor B Circuit Low Input
Trouble code P0387 means the PCM has detected a signal from crankshaft position sensor B that is outside the normal variation set by the manufacturer.
Symptoms of Bad or Failing Vacuum Hoses
Common signs include the Check Engine Light coming on, the engine not running smoothly, and the engine losing power or not starting.
B1915 OBD-II Trouble Code: Air Bag Driver Circuit Failure
B1915 means the air bag driver circuit has failed, likely due to defective wires or a faulty clock spring.