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Automotive glossary

Drive-by-wire (Electronic Throttle)

Drive-by-wire means the accelerator pedal controls the throttle electronically instead of through a cable.

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What is Drive-by-wire (Electronic Throttle)?

The control unit can also adjust the throttle for stability control, cruise control and emissions. Both pedal and throttle have redundant sensors. Faults usually switch to a reduced-power mode. When a fault is detected, the throttle often opens to a fixed small position so the car can still move slowly.

How it works

The pedal sensor signal goes to the control unit, which drives a motor on the throttle body.

Why it matters for your car

Dirty throttle bodies can cause idle problems. Never force the throttle plate by hand.

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