Dacia throttle relearn

Step-by-Step Dacia Throttle Relearn Tutorial

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Step-by-Step Dacia Throttle Relearn Tutorial

If you own a Dacia vehicle with an electronic throttle control system, you may need to perform a throttle relearn procedure from time to time. This process helps recalibrate the throttle body and restore proper operation of the electronic throttle control. In this comprehensive guide, we’ll cover which Dacia models require a throttle relearn, provide a detailed tutorial on how to do it yourself, and share some expert tips.

What is a Throttle Relearn and Why is it Needed?

Modern Dacia vehicles, like many other cars today, use an electronic throttle control system instead of a traditional cable-operated throttle. The electronic throttle control uses sensors to detect accelerator pedal position and a servo motor to open and close the throttle valve.[1] This allows for more precise control of the air entering the engine.

Over time, the throttle body can accumulate carbon deposits or the sensors can wear out, leading to issues like a rough idle, stumbling on acceleration, or reduced fuel efficiency. A throttle relearn procedure clears any learned values and recalibrates the throttle body to factory specifications.

Dacia Models That May Require a Throttle Relearn

Most newer Dacia models with electronic throttle control may need an occasional throttle relearn. This includes:

  • Dacia Duster (2010-present)
  • Dacia Sandero (2007-present)
  • Dacia Lodgy (2012-present)
  • Dacia Dokker (2012-present)
  • Dacia Logan (2004-present)

If you experience any drivability issues on these models like a rough idle, hesitation, or stumbling on acceleration, a throttle relearn is a good first step before more in-depth diagnostics.

Step-by-Step Throttle Relearn Tutorial

Here’s a detailed guide on performing a throttle relearn on your Dacia vehicle. Make sure the engine is off and the key is out of the ignition before starting.

  1. Locate the diagnostic port under the dashboard, usually near the steering column. It is a 16-pin trapezoid-shaped connector.
  2. Plug in a compatible OBD-II scan tool into the diagnostic port. Power on the scan tool.
  3. Turn the ignition key to the “ON” position but do not start the engine. All the dash lights should come on.
  4. Using the scan tool, navigate to the “Throttle Body Relearn” or “Idle Relearn” function. On some tools this may be under “Powertrain” or “Engine.”
  5. Follow the scan tool’s prompts to start the relearn process. It will instruct you to press and release the accelerator pedal a certain number of times.
  6. Once done, turn off the ignition and unplug the scan tool. The throttle body is now recalibrated.
  7. Start the engine and let it idle for a few minutes. Take a short test drive to confirm proper operation. The idle should be smooth and acceleration should feel linear without stumbling.

If you don’t have access to a scan tool, some Dacia models allow a manual relearn process:

  1. Turn the ignition to “ON” without starting the engine.
  2. Wait 3 seconds.
  3. Fully depress the accelerator pedal to the floor and release it completely 5 times within 5 seconds.
  4. Wait 7 seconds.
  5. Fully depress the accelerator pedal and hold for approx. 20 seconds until the check engine light starts blinking.
  6. Release the accelerator and start the engine. Let it idle and see if the issue is resolved.

Tips from Dacia Experts

Here are a few recommendations from mechanics experienced with Dacia vehicles:

  • Perform a throttle relearn if you replace the throttle body, accelerator pedal, ECU, or disconnect the battery.[1] The system needs to relearn the parameters.
  • A scan tool relearn is more reliable than the manual pedal method. If the manual method doesn’t work, try again with a scan tool.
  • Inspect the throttle body and clean it if you spot heavy carbon deposits before doing a relearn.[3] Excess deposits can skew the calibration.
  • Make sure the accelerator pedal moves smoothly and returns to the idle position before starting the relearn. Binding or sticking can cause issues.
  • If the relearn doesn’t resolve your issue, there may be a problem with the idle air control valve, mass airflow sensor, or a vacuum leak. Further diagnosis with a scan tool is needed.

Final words from Boss Erwin

The electronic throttle control system on your Dacia is designed to provide optimal performance and efficiency. If you experience any drivability issues, performing a throttle relearn is an important first troubleshooting step. In many cases, it can restore normal operation without an expensive repair.