Powertrain
generic / SAE
P0837
Four Wheel Drive (4WD) Switch Circuit Range/Performance
4WD switch is electrically intact but its values do not match a valid bit pattern — multiple positions asserted simultaneously, or values outside the calibrated range.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 37
Possible causes
- Contaminated rotary contact high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
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: possible
- Estimated cost: 80–400 €
- Estimated time: 0.4–1.5 h
- Component: four wheel drive switch
- MIL / check engine light
Sources
References
sae:J2012