Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0819 OBD-II Trouble Code: Up and Down Shift Switch to Transmission Range Correlation

P0819 OBD-II Trouble Code: Up and Down Shift Switch to Transmission Range Correlation

diagnostic check engine light

A P0819 trouble code is related to a vehicle’s automatic transmission and its up- and down-shift functions, frequently referred to as “manual mode.”

What the P0819 code means

P0819 is an OBD-II generic code for a voltage/resistance problem with the transmission’s up- and down-shift switch. When the engine computer detects voltage or resistance from the transmission range correlation circuit (the switch, wiring, connectors, and mode actuator), it will illuminate a check engine light and, depending on make and model, disable the manual shifting functions of the transmission.

What causes the P0819 code?

The most common causes for a P0819 are:

  • Faulty up- and down-shift switch
  • Faulty or corroded electrical connectors
  • Faulty or corroded wiring

What are the symptoms of the P0819 code?

Symptoms will depend on the make and model of your vehicle, but typical issues are disabled use of the up- and down-shift functions. Some vehicles may enter “limp-mode” that limit high rpm shifting.

How does a mechanic diagnose the P0819 code?

Your mechanic will typically start with a visual inspection of the up- and down-shift switch itself. Locations may vary between manufacturers, but for the most part, the switch is located underneath the center console. If any wiring or electrical connectors look dirty or damaged, they should be repaired or replaced. If it appears the switch itself is damaged, your mechanic will replace the switch and test drive the vehicle.

Common mistakes when diagnosing the P0819 code

The electrical connectors for the switch can be damaged from spilled liquid such as beverages stored in the cupholders. When this happens, it can cause a P0819 when the switch is still in working order. While rare, the condition of the connectors should not be overlooked.

How serious is the P0819 code?

Because most automakers will not let a P0819 trigger “limp-mode,” the code typically isn’t that serious of an issue. The transmission should shift as it should in normal drive mode. If “limp-mode” is activated, this can hinder driving from a lack of performance.

What repairs can fix the P0819 code?

The most common repairs for a P0819 are as follows:

  • Replacing the up- and down-shift switch
  • Replacing electrical connectors for the switch
  • Replacing damaged wiring

Additional comments for consideration regarding the P0819 code

While rare, the number of P0819 issues may soon increase as more and more modern vehicles offer automatic transmissions with manual shift modes.

Need help with a P0819 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: The AWD disable light is on in my 2006 Buick Rendezvous

Some systems require more than a code reader to find a fault. The AWD disable light means that there is a fault with that system. The AWD system controls torque (rotational force) to the four wheels. This is to improve...

Q: OBD not working

Hi there. If the OBD port is not working then most of the time this is caused by a loss of power to the plug. The fuse to the plug needs to be checked first to see if it is...

Q: Trouble code P0101

Hello. P0101 is the trouble code for a problem with the mass airflow sensor and or circuit. This code is thrown when the computer detects an issue with the signal of the MAF sensor. The MAF sensor is one of...