P0820 code meaning
Gear Lever X-Y Position Sensor Circuit
What P0820 means
Gear lever X and Y position sensors detect a selector's position in two directions: on an H-gate shift and select direction (a LuK patent uses two sensors about 90° apart), on a shift-by-wire lever its two axes. P0820 covers the whole X-Y circuit, P0821–P0824 and P082A–P082F sensor 1, P089A–P08A3 a redundant sensor 2. P0820 is the umbrella code: the module does not tell X from Y, or sees an invalid combination of both axes that matches no gate position. The only documented user is Mitsubishi's 2022 Outlander PHEV, which names it 'shift lever position (main) circuit malfunction' and sets it for an impossible lever position, without published thresholds. GM reads its X/Y sensors under P082A–P082F instead. Range selection may be blocked and the vehicle stays in P or N.
P0820 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0820
- Range cannot be selected or only partly
- Vehicle stays in P or N, or limp mode
- Transmission warning, range display flashes or missing
Common causes of P0820
- Most likelyWire or connector between selector and module open or shorted
- Most likelyPosition sensor in the selector assembly faulty
- PossibleSensor supply (5 V reference) or ground faulty
- Less likelyTransmission, hybrid or selector module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gear lever position sensorElectronic range selectorSensor wiringTransmission control module
What each part of P0820 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| 20 | The exact fault in that area. |
What to do next
- Note P0820 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0820
What does P0820 mean?
P0820 means "Gear Lever X-Y Position Sensor Circuit". Gear lever X and Y position sensors detect a selector's position in two directions: on an H-gate shift and select direction (a LuK patent uses two sensors about 90° apart), on a shift-by-wire lever its two axes. It is a generic code, so it means the same on every make.
Is it safe to drive with P0820?
Drive gently and only to a workshop. With P0820 the car can go into limp mode (reduced power) to protect itself.
Will P0820 fail an emissions test?
P0820 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0820 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P0820 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.