P0639: Throttle Actuator Control Range/Performance — Bank 2
What to do
Expect severely reduced power. Safe to drive slowly for a short distance, but not a journey.
What this code means
The electronic throttle is not reaching its commanded position on bank 2 — the counterpart of P0638, found on engines with a throttle body per bank. Everything in P0638 applies, and the same severe power limitation follows.
Likely causes
Start here
- Carbon deposits in the throttle body · easy
- Faulty throttle position sensor · moderate
- Faulty throttle actuator motor · moderate
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P0639.