P0819Generic code

P0819 Code: Up and Down Shift Switch to Transmission Range Correlation

The P0819 code means the upshift or downshift signals do not agree with the position of the shifter. It is usually a stuck switch or a fault in the range sensor. It is not serious, and you can keep driving in automatic mode.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$30 to $400
Difficulty
Medium
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0819 code means

The computer expects to receive upshift or downshift requests only when the shifter is in the manual mode position. If it receives them in any other position (for example, in D), it stores the P0819 code.

It is usually caused by a stuck switch or by a fault in the range sensor.

On transmissions with a manual mode shifter (+/-), the manual position is detected by its own switch, and the upshift and downshift requests by two others. If one of them gets stuck from dirt or spilled liquids, the computer receives requests that make no sense together. Clean the shifter and check each switch on the scan tool before you replace the range sensor.

P0819 code symptoms

  • Manual mode that does not work.
  • Unexpected shifts.

Likely causes of the P0819 code

  1. Stuck shift switch. It sends a permanent shift request.
  2. Transmission range sensor reporting a wrong shifter position.
  3. Wiring that is cut or shorted.

How to diagnose the P0819 code step by step

  1. Check the switches on the scan tool.
  2. Check the range sensor.
  3. Clean the shifter and the manual mode contacts. Spilled liquids are a frequent cause.

How to fix the P0819 code

  • Repair the switch or the sensor.

Technical reference data

  • Manual shift requests are valid only when the shifter is in the manual position.
  • These are approximate values: check the manufacturer data for your vehicle.

Brand-specific notes

This code shows up on GM and Hyundai vehicles.

P0819 on GM

It appears on GM vehicles with a manual mode shifter, where a stuck switch is the first thing to rule out.

P0819 on Hyundai

It also appears on Hyundai vehicles, where the same check of each switch on the scan tool applies before the range sensor is replaced.

Frequently asked questions about P0819

What does the P0819 code mean?
It is a generic OBD2 code that means the upshift and downshift requests do not agree with the shifter position. The computer receives manual shift requests when the shifter is not in the manual position.
Can I drive with a P0819 code?
Yes, in automatic mode. The transmission keeps working, but the manual mode may not.
What usually fails?
A stuck switch, often from dirt or a spilled drink.
Is it serious?
No. It affects the manual shifting function, not the safety of the transmission.
How much does it cost to fix P0819?
Between $30 and $400. Cleaning the shifter is at the low end, and a new switch or range sensor is at the high end.
Will a P0819 code clear itself?
It can if the switch only stuck for a moment. A switch stuck with dirt or a failing range sensor will bring the P0819 code back.
What is the most common cause of P0819?
A stuck shift switch. Spilled liquids around the shifter are a frequent reason.

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