Accelerator pedal position sensor for all vehicle types

Sensor, accelerator position for cars: find out more! How to choose, when to change , and how much they cost

The accelerator pedal position sensor is a device which measures the force applied to the pedal by the driver and moving the throttle followed by injection of the fuel mixture into the engine.

Types of accelerator pedal position sensors:

• potentiometric sensor;
• Hall-effect angle sensor;
• inductive sensor.

Construction of accelerator pedal position sensors

A potentiometric sensor is a resistor with sliding contacts, which, in turn, are connected to the shaft of the accelerator pedal. When the pedal position changes, certain output voltage is generated, which corresponds to the resistance of the potentiometer.

A Hall-effect angle sensor detects the pedal position with a help of a magnet mounted on the shaft of the accelerator pedal. The sensor measures magnetic field direction or its intensity.

The principle of the inductive sensor operation is also based on measuring of changes in the magnetic field caused by three coils moving relative to each other.

Accelerator pedal position sensor operating tips

Always use only high-quality pedal position sensors. Follow the recommendations and requirements provided by the vehicle manufacturer. Also perform diagnostics of the sensors during maintenance. Entrust this process to the specialists at a service station, as professional equipment will be required.

Faults of accelerator pedal position sensors

• contacts oxidation;
• connections breakage;
• absence of signals in the sensor.

Signs of accelerator pedal position sensors faults

• The corresponding signal lights up on the dashboard;
• The engine cannot reach maximum power;
• The engine rotation speed is increasing or decreasing during idling;
• The engine stops after the accelerator pedal is suddenly released.

Causes of accelerator pedal position sensors faults

• incorrect mounting position of the sensor;
• impact damage;
• damaging of wiring insulation;
• usage of low quality sensors;
• non-compliance with the manufacturer operation requirements and recommendations.

Replacement of accelerator pedal position sensor

Repair of the accelerator pedal position sensor is impractical; mostly it is replaced as an assembly. Contact a service station to have it replaced, where specialists will perform quality diagnostics, and install a new sensor. Avoid replacing the component by yourself, as this procedure requires professional skills.

AutoDoc professional assistance

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