P071F
PPowertrainTransmission Mode Switch B Circuit High
What does this code mean?
Severity : LowP071F reports a high voltage on the transmission mode switch B circuit. This switch lets the driver choose a driving mode (sport, winter or manual, depending on the vehicle). The module sees an out-of-range signal, which often means an open circuit or a short to voltage.
Symptoms
- Check engine or transmission light on.
- Selected driving mode has no effect.
- Incorrect mode indication on the dashboard.
- Unusual shift behaviour, less often.
Possible causes
- Faulty mode switch.
- Wire open or shorted to voltage.
- Corroded or damaged connector.
- Liquid spilled on the centre console.
- Faulty transmission control module, less often.
Diagnosis and repair
- Inspect the mode switch connector and wiring.
- Check in live data whether the switch state changes when pressed.
- Measure circuit voltage and continuity with a multimeter.
- Replace the switch or repair the wiring.
- Clear the code and check that each mode works.
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Code
P071F
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012