How to Perform a Throttle Relearn on Renault Vehicles

Throttle Relearn Procedure for Renault Vehicles

Performing a throttle relearn, also known as a throttle body synchronization or idle relearn, is an important maintenance procedure for many Renault vehicles. Over time, the electronic throttle control system can lose its adaptive memory settings, leading to poor idle quality, rough running, hesitation on acceleration, and other drivability issues. Resetting the throttle body calibration allows the engine control module (ECM) to relearn the correct throttle position sensor settings.

This detailed guide will explain the throttle relearn procedure for popular Renault models, including the Clio, Megane, Scenic, Laguna, Koleos, Kadjar, Captur, Twingo, Talisman, Espace, Kangoo, Trafic, and Master. It is intended for informational purposes only—please consult with a qualified Renault mechanic and refer to your vehicle’s service manual before attempting this procedure.

Symptoms Indicating a Throttle Relearn May Be Needed

  • Rough, unstable, or high idle
  • Engine stalling
  • Hesitation or stumbling on acceleration
  • Check engine light on with throttle body-related fault codes
  • Reduced fuel efficiency
  • Uneven or jerky power delivery
  • Surging or hunting idle
  • Inconsistent engine response to accelerator pedal input

Common Reasons for Losing Throttle Calibration

The adaptive throttle position settings can be lost or corrupted for several reasons:

  • Disconnecting or replacing the battery
  • Performing an ECM reset
  • Clearing diagnostic trouble codes
  • Replacing the throttle body
  • Modifying the air intake or engine tune
  • Electrical issues such as corroded wiring or loose connections

If you have experienced any of these situations, it’s a good idea to perform a throttle relearn to restore proper operation. In some cases, an auto-scan tool may directly prompt you that a relearn is required.

Safety Precautions

Before beginning the throttle relearn procedure, make sure to follow these important safety guidelines:

  1. Park your vehicle on a level surface, engage the parking brake, and ensure the transmission is in Park (automatic) or Neutral (manual).
  2. Turn off all electrical accessories and ensure nothing is plugged into the 12V power outlets.
  3. Do not touch or disturb the accelerator pedal during the relearn process. Any external input can cause the procedure to fail.
  4. Make sure the battery is fully charged and in good condition. Use a charger to maintain voltage if needed.
  5. Work in a well-ventilated area away from flammable materials since the engine will be running.
  6. Keep hands, clothing, tools, and other objects away from moving parts in the engine compartment.
  7. Allow the engine to cool before beginning work to avoid burns or injuries.
  8. Wear safety glasses and protective gloves.
  9. Have a fire extinguisher on hand.
  10. If you feel unsure or uncomfortable at any point, stop and consult a professional Renault mechanic for assistance.

General Throttle Relearn Process

While the exact steps can vary between specific Renault models and engine types, the general process for performing a throttle position sensor relearn is as follows:

  1. Switch the ignition on (key in position II) but do not start the engine. Make sure all accessories are off.
  2. Wait 10 seconds to allow the ECM to power up fully. You may hear some clicking noises from the throttle body during this time.
  3. Fully depress the accelerator pedal to the floor and release it completely. Perform this full range of motion 3-5 times in succession.
  4. Wait 7-10 seconds for the ECM to recalibrate the sensor values. Do not touch the pedal during this time.
  5. Start the engine and let it idle in Park for 3 minutes. The engine may run rough or fast at first but should gradually stabilize.
  6. Perform a road test, driving at various steady speeds and gently accelerating. Make sure to drive long enough for the transmission to shift through each gear. Avoid hard acceleration or high RPMs.
  7. If the symptoms persist, repeat the relearn procedure 2-3 more times. In rare cases, a manual throttle body cleaning or replacement may be required if the valve is physically sticking.

Some later model year Renault vehicles (2015+) may support an alternative relearn method via the instrument cluster menu:

  1. Navigate to the Vehicle Settings menu using the steering wheel controls.
  2. Scroll to and select Engine Management, then Throttle Body Relearn.
  3. Follow the on-screen prompts to initiate the OBD relearn function. The process will take 30-60 seconds.
  4. Once complete, restart the engine and perform a road test to confirm proper operation.

Not all Renault models support this option. Consult your owner’s manual or a dealer to check if an OBD relearn is available for your specific vehicle.

Model-Specific Relearn Tutorials

Here are some of the most common Renault models that may require a throttle body relearn, along with specific instructions and tips for each vehicle. Click on a model to jump to its detailed tutorial:

Renault Clio

The Renault Clio is a popular supermini car that has been in production since 1990. Models built from 2012-present (Clio IV) commonly require a throttle body relearn after battery or ECM issues.

To perform the relearn procedure:

  1. Make sure the engine is off and cool. The key should be in the ignition but switched off.
  2. Disconnect the negative battery terminal for 10 minutes to fully reset the ECM. Reconnect the battery.
  3. Turn the key to the “on” position but do not start the engine.
  4. Wait 30 seconds, then fully depress and release the accelerator pedal 5 times within 10 seconds.
  5. Wait another 30 seconds for the relearn to complete. Start the engine.
  6. Let the engine idle for 5 minutes, then rev it slightly a few times. Perform a road test and make sure the idle is stable.

Tips:

  • Clio models with push-button start use the same procedure, just push the button without your foot on the brake to enter accessory mode.
  • If the engine check light comes on during the relearn, retrieve the codes with an OBD-II scanner. The throttle body may be faulty.
  • Some Clio IV models may alternatively support a relearn through the instrument cluster Vehicle Settings menu. Look for a “Throttle Body Relearn” option.

Renault Megane

Renault Megane models from 1995-present can be prone to throttle body issues, especially after a battery change or ECM reflash. The relearn procedure is straightforward:

  1. Turn the ignition to the “on”position (second click) without starting the engine.
  2. Wait 10 seconds, then fully press and release the accelerator pedal to the floor 3 times.
  3. Start the engine within 10 seconds of the last pedal press. Let it idle for at least 30 seconds.
  4. Perform a road test, making sure to drive long enough for the transmission to shift through each gear. Avoid hard acceleration.
  5. If the idle is still rough, repeat the procedure up to 3 times total. You may need to drive 5-10 miles to fully relearn the idle.

Tips:

  • For keyless entry/start Megane models, press the “Start” button twice without the brake pedal to enter ignition on mode.
  • If you have an OBD-II scanner with Renault software, you can initiate the relearn through the diagnostic menu. Look for an option called “Throttle Body Alignment.”
  • Megane RS models may require a slightly different procedure. Consult your owner’s manual or a Renault performance specialist.

Renault Scenic

The Renault Scenic compact MPV uses a similar throttle relearn process to the Megane:

  1. Sit in the driver’s seat with the doors closed and all accessories off.
  2. Insert the key and turn it to the “on” position, or press the start button twice without the brake pedal.
  3. Wait 10 seconds, then slowly press and release the accelerator pedal fully 5 times.
  4. Crank the engine and let it idle for 3 minutes without touching the pedal. It may run rough at first.
  5. Take the vehicle for a 10 minute drive, using gentle acceleration and braking. Make sure the engine reaches full operating temperature.
  6. Let the engine cool down fully (4 hours), then repeat steps 1-5 if needed.

Tips:

  • If you recently disconnected the battery, make sure it is fully recharged before attempting a relearn. Low voltage can cause the process to fail.
  • The Scenic’s throttle body is located at the front of the engine, attached to the air intake hose. Make sure this connection is tight and leak-free.
  • In rare cases, the idle air control valve or throttle position sensor may be faulty, preventing a successful relearn. Have these components tested at a Renault dealer.

Renault Laguna

Renault Laguna models built from 2007-2015 (Laguna III) use a drive-by-wire throttle system that may need to be relearned after battery or ECM issues.

Follow these steps:

  1. Sit in the driver’s seat and close all doors. Insert the key and turn it to the “on” position (second click) without starting the engine.
  2. Wait 30 seconds, then fully press and release the accelerator pedal 4 times within 10 seconds.
  3. Crank the engine and let it idle in park for 5 minutes. Do not touch the pedal during this time.
  4. Perform a road test of at least 10 minutes, using various throttle and gear positions. Confirm the idle returns to normal.
  5. If roughness or hesitation persists, repeat steps 1-4. In rare cases a throttle body cleaning or replacement may be needed.

Tips:

  • The Laguna III uses a Siemens VDO throttle body that is known to develop carbon deposits over time. If the relearn doesn’t resolve your issues, try cleaning the throttle plate and housing with carburetor cleaner.
  • Inspect the accelerator pedal wiring and connector for damage or corrosion. The relearn will fail if the signal is interrupted.
  • The 2.0 dCi engine is especially sensitive to air leaks in the intake tract. Check the intercooler hoses and clamps if you have a rough idle after the relearn.

Renault Koleos

The Koleos compact crossover SUV shares many powertrain components with the Nissan Qashqai/Rogue. As such, it uses a similar throttle relearn procedure:

  1. Turn the ignition on but do not start the engine. Make sure all accessories are off.
  2. Wait 3 seconds, then fully depress the accelerator pedal to the floor and release it quickly. Repeat this 5 times in a row.
  3. Wait 7 seconds for the relearn to complete. You may hear some clicking noises from the throttle body.
  4. Start the engine and let it idle for 2 minutes. Perform a road test, driving at various speeds and loads.
  5. If the idle is still unstable, repeat steps 1-4 up to 3 times total.

Tips:

  • Some Koleos models may alternatively support an idle relearn through the instrument cluster menu. Navigate to Vehicle Settings > Engine > Idle Relearn and follow the prompts.
  • If the throttle body is physically sticking or clogged with carbon, the relearn may not be successful. Try cleaning the throttle plate and housing with throttle body cleaner spray.
  • The Koleos’ electronic throttle control system is sensitive to voltage fluctuations. Make sure the battery is fully charged and in good condition before attempting a relearn.

Renault Kadjar

The Renault Kadjar compact crossover uses a drive-by-wire throttle that may need to be relearned after battery or ECM issues. The procedure varies slightly depending on model year:

For 2015-2018 models:

  1. Turn the ignition on (press Start button without brake) but do not start the engine.
  2. Wait 10 seconds, then fully press and release the accelerator pedal 3 times within 5 seconds.
  3. Start the engine within 10 seconds of the last pedal press. Let it idle for 2 minutes.
  4. Perform a road test, driving at various speeds and loads for at least 10 minutes.

For 2019+ models with keyless ignition:

  1. With the key fob inside the vehicle, push the Start button once without the brake pedal to enter accessory mode.
  2. Wait 10 seconds, then fully press and release the accelerator pedal 5 times.
  3. Push the Start button again to turn off the ignition. Wait 10 seconds.
  4. Restart the engine normally and let it idle for 3 minutes. The idle may be high at first but should gradually come down.
  5. Take the Kadjar for a 15 minute drive, using various throttle and gear positions. Confirm the idle has returned to normal.

Tips:

  • If the engine check light comes on during the relearn, retrieve the codes with an OBD-II scanner. The throttle body or accelerator pedal position sensor may be faulty.
  • Kadjar models with the 1.3 TCe engine may need to have the relearn performed twice in a row for it to fully take effect.
  • A rough or unstable idle after the relearn can indicate a vacuum leak or PCV issue. Inspect the intake hoses and valve cover for cracks or loose connections.

Renault Captur

The Renault Captur subcompact crossover uses an electronic throttle control system that can lose its memory settings for various reasons. To perform a relearn:

  1. Turn the ignition on (press Start button without brake) but do not start the engine.
  2. Wait 30 seconds, then slowly press the accelerator pedal to the floor and release it. Repeat 4 more times.
  3. Start the engine and let it idle for 3 minutes. Do not touch the pedal during this time.
  4. Perform a road test, driving for at least 10 minutes and using various throttle positions. Confirm the idle has stabilized.
  5. If roughness or hesitation persists, repeat steps 1-4 up to 3 times total.

Tips:

  • The Captur’s throttle body relearn is often needed after the battery has been disconnected or run dead. Make sure the battery is fully charged before attempting the procedure.
  • If the engine stalls immediately after starting, the throttle body may be stuck closed. Try tapping it gently with a screwdriver handle to free up the plate.
  • Captur models with the 1.5 dCi diesel engine may need a longer road test drive (20-30 minutes) to fully relearn the idle.

Renault Twingo

The Renault Twingo city car uses a relatively simple throttle relearn procedure:

  1. Sit in the driver’s seat and close all doors. Insert the key and turn it to the “on” position without starting the engine.
  2. Wait 10 seconds, then fully press and release the accelerator pedal 3 times within 5 seconds.
  3. Crank the engine and let it idle for 60 seconds. The idle speed may be slightly high at first but should gradually decrease.
  4. Take the Twingo for a 5-10 minute drive around the block. Make sure to use various throttle positions and let the transmission shift through each gear.
  5. If the idle is still rough or high, repeat steps 1-4 one more time.

Tips:

  • Twingo models with the 1.0 SCe engine may require a slightly different relearn procedure. Consult your owner’s manual or a Renault dealer for specific instructions.
  • If the battery has been disconnected, make sure to drive the Twingo for at least 30 minutes to allow the ECM to fully relearn all its adaptive settings.
  • A failed throttle relearn can sometimes indicate a faulty throttle position sensor or accelerator pedal. Have these components tested if the procedure doesn’t resolve your issues.

Renault Talisman

The Renault Talisman mid-size sedan uses a drive-by-wire throttle system that may need to be relearned after electrical issues or ECM replacement.

To perform the procedure:

  1. Sit in the driver’s seat and press the Start button once without touching the brake pedal.
  2. Wait 10 seconds, then fully depress and release the accelerator pedal 4 times.
  3. Press the Start button again to shut off the ignition. All dashboard lights should turn off.
  4. Wait 10 more seconds, then restart the engine normally. Let it idle in park for 3 minutes.
  5. Take the Talisman for a 15 minute test drive. Accelerate smoothly through each gear and make sure to maintain steady speeds. Avoid hard braking or acceleration.
  6. If the idle remains rough or the throttle response feels inconsistent, repeat steps 1-5 up to 2 more times.

Tips:

  • The Talisman’s throttle body is located at the rear of the engine, which can make it tricky to access. If you need to clean the throttle plate or housing, it’s best to remove the entire air intake assembly for better visibility.
  • Some Talisman models may support a throttle relearn through the instrument cluster menu. Navigate to Vehicle Settings > Engine Parameters > Throttle Relearn and follow the on-screen prompts.
  • If the check engine light comes on with throttle-related fault codes, the relearn may not be successful. Diagnose and repair the underlying issue before attempting the procedure again.

Renault Espace

The Renault Espace minivan uses an electronic throttle control system that can lose its memory settings for various reasons. To perform a relearn:

  1. Sit in the driver’s seat and close all doors. Press the Start button once without touching the brake pedal.
  2. Wait 10 seconds, then slowly press and release the accelerator pedal 5 times in a row.
  3. Press the Start button again to shut off the ignition. Wait 30 seconds.
  4. Restart the engine normally and let it idle for 3-5 minutes. Do not touch the pedal during this time.
  5. Take the Espace for a 10 minute test drive, using various throttle positions and speeds. Make sure the transmission shifts through each gear.
  6. If the idle remains unstable or the throttle feels jerky, repeat steps 1-5 after letting the engine cool down fully.

Tips:

  • Espace models with the 1.6 dCi twin-turbo diesel engine may need a longer relearn drive (20-30 minutes) to fully adapt.
  • If you have an OBD-II scanner with Renault software, you can monitor the throttle position sensor values in real-time during the test drive. Make sure the readings change smoothly and consistently with pedal input.
  • The Espace’s throttle body is prone to carbon buildup over time, which can cause relearn issues. If the procedure doesn’t resolve your problems, try cleaning the throttle plate and housing with carburetor cleaner.

Renault Kangoo

The Renault Kangoo compact van uses a relatively simple throttle body relearn procedure:

  1. Turn the ignition on (second click) without starting the engine.
  2. Wait 30 seconds, then fully press and release the accelerator pedal 3 times within 10 seconds.
  3. Start the engine and let it idle for 2 minutes. Do not touch the pedal.
  4. Perform a road test, driving for at least 10 minutes and using various throttle positions.
  5. If the idle remains rough, repeat steps 1-4 up to 2 more times.

Tips:

  • Kangoo models with the 1.5 dCi engine may require a longer idle time (5 minutes) for the relearn to fully take effect.
  • If you have an OBD-II scanner, you can check for pending throttle-related fault codes before and after the relearn. Codes P0121, P0221, or P2135 can indicate an issue with the throttle position sensor or wiring.
  • The Kangoo’s throttle body is located on the front of the engine, attached to the air filter housing. Make sure this connection is secure and leak-free.

Renault Trafic

The Renault Trafic mid-size van uses a drive-by-wire throttle system that may need to be relearned after battery or ECM issues.

Follow these steps:

  1. Sit in the driver’s seat and close all doors. Insert the key and turn it to the “on” position without starting the engine.
  2. Wait 10 seconds, then slowly press the accelerator pedal to the floor and release it. Repeat 4 more times.
  3. Crank the engine and let it idle in park for 3 minutes. The idle may be slightly high at first.
  4. Take the Trafic for a 15 minute drive, using various throttle positions and letting the transmission shift through each gear.
  5. If the idle remains unstable or surges, repeat steps 1-4 after allowing the engine to cool down fully.

Tips:

  • Trafic models with the 2.0 dCi engine may need to have the battery disconnected for 10 minutes before performing the relearn. This allows the ECM to fully reset.
  • If you have a bi-fuel (gasoline/LPG) Trafic, make sure to perform the relearn procedure on both fuel types. Switch to LPG mode and repeat steps 1-4.
  • A stuck or binding throttle plate can cause relearn issues. If the procedure doesn’t help, try cleaning the throttle body with carburetor cleaner and a soft brush.

Renault Master

The Renault Master full-size van uses an electronic throttle control system that can lose its calibration settings for various reasons. To perform a relearn:

  1. Turn the ignition on (second click) without starting the engine.
  2. Wait 30 seconds, then fully press and release the accelerator pedal 5 times within 10 seconds.
  3. Start the engine and let it idle for 5 minutes. Do not touch the pedal during this time.
  4. Perform a road test, driving for at least 20 minutes and using various throttle positions. Make sure the transmission shifts through each gear.
  5. If the idle remains rough or surges, repeat steps 1-4 up to 2 more times.

Tips:

  • Master models with the 2.3 dCi engine may require a longer relearn drive (30+ minutes) to fully adapt, especially if the van is heavily loaded.
  • If the battery has been disconnected, make sure to let the engine run for at least 10 minutes before shutting it off again. This allows the ECM to relearn its idle settings.
  • The Master’s throttle body is located under the engine cover, which can make it difficult to access. If you need to clean the throttle plate or housing, it’s best to removethe cover for better visibility.

Final Words from Boss Erwin

Performing a throttle body relearn is an important maintenance procedure for many Renault models. By resetting the electronic throttle control system’s adaptive memory, you can restore proper idle quality, throttle response, and overall drivability.

The exact relearn process can vary between different engines and model years, so it’s important to consult your owner’s manual or a Renault dealer for specific instructions. In general, the procedure involves turning the ignition on and depressing the accelerator pedal several times in quick succession, followed by an idle period and a road test drive.