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.
Affected components
- Four wheel drive switch
Common causes
- High likelihood: Contaminated rotary contact
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
Possible 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
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.