P0639
Throttle Actuator Control Range or Performance Bank 2
The drive-by-wire throttle actuator on bank 2 does not respond as commanded - actuator slow, gearing slipping, or position feedback offset against actual blade angle.
The drive-by-wire throttle actuator on bank 2 does not respond as commanded - actuator slow, gearing slipping, or position feedback offset against actual blade angle.
Common causes
- high
Actuator sticking due to carbon
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-880
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P0639 mean?
P0639 means "Throttle Actuator Control Range or Performance Bank 2". It is a generic OBD-II code that points to a fault in the computer & auxiliary output controls.
What are the most common causes of P0639?
actuator sticking due to carbon — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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