Technical Service Bulletins

Kia throttle relearn

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Kia throttle relearn

This bulletin provides the procedure to reset (erase) and relearn the electronic throttle control (ETC) adaptive value (throttle valve position) on Kia Rondo, Forte, Optima, Sorento and Sportage vehicles with Theta 2.0/2.4L gasoline engines with ETC systems.

After the following repairs are completed, the ETC adaptive value must be reset/relearned. If starting the engine without resetting/relearning the ETC adaptive values, DTCs P0638 (throttle actuator control range/performance) or P2110 (throttle actuator control system - force limited rpm) will be stored in the ECM memory and the MIL will be illuminated.

If the MIL is illuminated with DTC P0638 or P2110, follow this procedure to reset/relearn the adaptive value before replacing the ETC system or any related components. If the MIL continues to be illuminated with DTC P0638 or P2110, even though the ETC adaptive value has been reset/relearned, follow the appropriate service manual to diagnose and repair the ETC system or related components.


1. Check for DTCs P0638/P2110.

2. Clear DTC(s).

3. Select Option/Data Treatment.

4. Select “Resetting adaptive values.

5. ”Select “Reset,” then wait 10 seconds after turning the ignition off (relay off).

6. Wait for five seconds after turning the ignition on (ETC adaptive value relearn).

7. Start the engine.

8. Recheck for DTC(s).

If the engine is started without waiting for at least five seconds after turning the ignition key to the on position to allow the ECM to automatically learn the throttle valve position, MIL illumination with DTC P0638 and P2110 will occur. In this case, repeat the above procedure.

If the vehicle is equipped with a push button start system, push the engine start button two times without depressing the brake pedal. This will allow the ECM to automatically learn the throttle valve position. Then wait for approximately five seconds.

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