P0819
Up and Down Shift Switch to Transmission Range Correlation
- Severity
- Medium
- Driving
- Drivable — book it in
The up and down shift switches and the transmission range sensor do not agree. The module is being told the driver is in manual mode and requesting shifts, while the selector position says something different - or the other way round. Two sources that should match do not, and the module cannot tell which one is lying.
Possible causes
- CommonTransmission range sensor out of adjustment
- CommonWorn selector linkage, so the lever position and the sensor disagree
- CommonFailed shift switch stuck in one state
- PossibleWiring fault on either circuit
- PossibleSelector assembly worn or damaged
What you might notice
- Manual mode engaging or disengaging on its own
- Gear position display disagreeing with the lever
- Shifts ignored or unexpected
- Check engine light on
What to check, in order
- Watch both the selector position and the switch states on the live data screen while moving the lever through its full travel. The one that does not match reality is the fault.
- Check the range sensor adjustment before replacing anything - adjustment is often the whole repair.
- Check the selector cable and linkage for wear and free play.
- Inspect the selector assembly for a worn detent or a broken return spring.
- Check for range sensor codes stored alongside, which would point the diagnosis at the sensor rather than the switches.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Transmission
P0800P0801P0802P0803P0804P0805P0806P0807P0808P0809P0810P0811P0812P0813P0814P0815P0816P0817P0818P0819P0820P0821P0822P0823P0824P0825P0826P0827P0828P0829P0830P0831P0832P0833P0834P0835P0836P0837P0838P0839P0840P0841P0842P0843P0844P0845P0846P0847P0848P0849P0850P0851P0852P0853P0854P0855P0856P0857P0858P0859P0860P0861P0862P0863P0864P0865P0866P0867P0868P0869P0870P0871P0872P0873P0874P0875P0876P0877P0878P0879P0880P0881P0882P0883P0884P0885P0886P0887P0888P0889P0890P0891P0892P0893P0894P0895P0896P0897P0898P0899