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P0638

Throttle Actuator — Reading Out of Range

High — fix right awayDo not drive

Severity: Fix right away. Driving risks expensive damage or a breakdown.

What P0638 means

The motor that opens the throttle on drive-by-wire cars is not moving the throttle to the position the computer commanded.

Common causes

How to fix it

Clean the throttle body, check the wiring, and replace the throttle body assembly if the motor is bad.

Can I drive with P0638?

The car may go into limp mode with very little power, or not respond to the gas pedal. Get it checked right away.

Related codes

Questions, answered

Is it safe to drive with code P0638?

Avoid driving until it is checked — towing is the safer choice. The car may go into limp mode with very little power, or not respond to the gas pedal. Get it checked right away.

What causes code P0638?

The most common causes are: Failed throttle actuator motor; Dirty throttle body; Damaged wiring; Failing throttle body assembly. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0638?

Clean the throttle body, check the wiring, and replace the throttle body assembly if the motor is bad.

Not repair advice. This page gives general information about code P0638 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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