Throttle/Pedal Position Sensor/Switch B Circuit Low
The throttle body controls how much air goes into the engine. Two sensors tell the ECU how far open it is, and the ECU compares one with the other.
What the car has detected
The second throttle sensor signal is too low: fuse, wiring or the sensor itself.
With a throttle fault the ECU usually limits the engine (limp mode) and the car barely accelerates. Drive carefully and have it checked soon.
Symptoms
- Engine or EPC warning light on
- Loss of power or limp mode
Possible causes
- Blown fuse
- Broken or shorted wire, or a loose or corroded connector
- Faulty throttle sensor
Checks for the garage
- Check the circuit fuse
- Check the throttle body connector and wiring
- Compare the live data reading with the expected one
Next step
Ask for the fuse, connector and wiring of the throttle body to be checked before it is replaced.
Go to a garage soon. The electrical check needs a multimeter and a diagnostic tool.