(Throttle Actuator Control System – Stuck Closed)
What is the P2112 Code? It is an error code related to the throttle actuator control system.
The P2112 Code is an important indicator for Renault vehicle owners. It signals potential problems with the throttle control system, a crucial component for the proper functioning of the engine. Understanding the implications of this code can help you make informed decisions regarding the maintenance and repair of your vehicle.
It is essential to know the symptoms associated with the P2112 Code in order to act quickly. Ignoring these warnings can lead to more serious problems, affecting not only your vehicle’s performance but also your safety on the road.
Common Symptoms of the P2112 Code 🚨
Drivers who have encountered the P2112 Code often report a feeling of loss of control over their vehicle. This can be particularly concerning in situations where rapid acceleration is needed, for example, when overtaking on the highway.
- Check Engine Light on
- Unstable RPM (fluctuations at idle)
- Noticeable loss of power during acceleration
- Jerking or hiccups while driving
- Engine stalling at idle or low speed
- Limp mode activated (limited power)
Main Causes 🔧
- Faulty throttle body :
- Mechanical binding (dirt, wear).
- Failure of the integrated electric motor.
- Faulty Throttle Position Sensor (TPS) :
- Inconsistent values sent to the ECU.
- Wiring problems :
- Damaged/oxidized wires (especially near the throttle body).
- Loose or corroded connectors.
- Clogged throttle body :
- Build-up of soot/carbon blocking the flap.
- Faulty Engine Control Unit (ECU) :
- Rare, but possible on older vehicles or after flooding.
Renault-Specific Diagnosis ⚙️
The causes of the P2112 Code can vary. For example, mechanical binding could occur due to dirt deposits or natural wear. It is advisable to regularly check the condition of your throttle body to avoid the accumulation of dirt that could lead to this error code.
- Reading codes :
- Use a Renault diagnostic tool (Clip, CanClip) to access supplementary codes and real-time data (throttle position, TPS voltage).
- Visual inspection :
- Inspect the throttle body connector (common on Scénic III, Clio IV).
- Resistance test :
- Measure the resistance of the throttle body windings (usually 0.5–2 Ω).
- Test cleaning :
- Clean the throttle body with a specific product (non-abrasive) to remove a simple clog.
Recommended Repairs 🛠️
| Cause | Solution | Estimated Cost |
|---|---|---|
| Clogged throttle body | Thorough cleaning | 50–100 € |
| Faulty TPS sensor | Replacement of the sensor (or the complete throttle body depending on the model) | 150–400 € |
| Damaged wiring | Repair of the harness/replacement of connectors | 100–300 € |
| Faulty throttle body | Replacement of the assembly with mandatory recalibration | 300–600 € (part + labor) |
| ECU failure | Reprogramming or replacement (requires Renault expertise) | 400–1000 € |
⚠️ Important: After any intervention, recalibrate the throttle body with a dedicated tool (mandatory on most Renaults).
Key Tips 🔑
- Quick intervention: A stuck throttle body can cause a total loss of acceleration control.
- Original parts: Prefer OEM parts (e.g., Valeo, Bosch) to avoid calibration errors.
- Reset: After repair, reset the ECU to clear adaptations.
- Frequent cases: On Renault 1.5 dCi, check the green connector located near the air box (known corrosion point).
Emergency & Safety 🚨
If the vehicle enters limp mode (limited power):
- Avoid long distances.
- Contact a garage equipped with a Renault diagnostic tool (the code can mask other faults).
💡 Good to know: Regular cleaning of the throttle body (every 60,000 km) prevents 80% of P2112 codes.
Conclusion: P2112 on Renault is often related to a stuck throttle body or a faulty sensor. Accurate diagnosis with the appropriate tool is crucial to avoid unnecessary repairs. Do not ignore this code: it directly impacts safety and performance.
(Source: Renault technical procedures, workshop feedback)
Ultra-condensed version:
P2112 = Throttle body stuck “closed”.
Causes: Faulty throttle body/sensor (60%), wiring (30%), ECU (10%).
Action:
- Clean throttle body + check connectors.
- Test TPS and wiring.
- Replace faulty part + recalibrate.
⚠️ Risk of limp mode → Rapid diagnosis mandatory.
To effectively diagnose a P2112 Code on a Renault vehicle, it is crucial to equip yourself with specialized tools such as the Renault Diag. These tools allow access to supplementary codes and real-time data, thus providing a more accurate picture of the problem.
Once you have identified the cause of the P2112 Code, the repair cost can vary. For example, cleaning the throttle body is a relatively inexpensive solution, while replacing the ECU can be much more expensive. By discussing options with your mechanic, you can choose the best approach based on your budget.
It is also useful to know that the symptoms of the P2112 Code can sometimes be confused with other mechanical problems. That is why proper diagnosis is essential. Do not hesitate to ask for detailed explanations about the tests performed by your mechanic.
In conclusion, the P2112 Code is an important warning signal for all Renault owners. By being proactive and performing regular diagnostics, you can avoid significant repair costs and ensure your vehicle’s safety. Be sure to follow the recommendations of professionals to keep your car in good condition.
Remember that the P2112 Code is an indicator that your vehicle requires immediate attention. Do not delay in having your car inspected if you experience associated symptoms. Proper maintenance of your vehicle contributes to its longevity and your safety.