Powertrain
generic / SAE
P071D
Transmission Mode Switch B Circuit
A circuit fault on the transmission mode switch A - the driver-controlled switch that selects modes like Sport, Manual, Tow on automatic transmissions.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 1D
Possible causes
- Open in switch or 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: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.4–1.5 h
- Component: transmission mode switch b
- MIL / check engine light
Sources
References
sae:J2012