Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 21
Possible causes
- Open or shorted wiring high
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1200 €
- Estimated time: 0.6–3 h
- Component: gear lever x sensor
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012