OBD-II code · Powertrain (generic)
P0821 Gear Lever X Position Sensor 1 Circuit
General electrical fault on the X-axis (left/right) position sensor 1 of an electronic gear lever. Used in stick-shift-by-wire systems where the lever is decoded into X/Y coordinates rather than discrete switches.
Is it safe to drive with P0821?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen or shorted wiring
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Gear Lever X Sensor, Wiring Harness
Related codes
- P0822Gear Lever Y Position Sensor 1 Circuit
- P089AGear Lever X Position Sensor 2 Circuit
- P089FGear Lever Y Position Sensor 2 Circuit
- P081EExcessive Clutch B Slippage
- P081FBrake Transmission Shift Interlock (BTSI) Signal Correlation
- P0820Gear Lever X-Y Position Sensor Circuit
- P0823Gear Lever X Position Sensor 1 Circuit Intermittent/Erratic
- P0824Gear Lever Y Position Sensor 1 Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.