If you have recently installed an LPG system on your 2015 Lancia Ypsilon 1.2 petrol 69 HP and are experiencing problems such as the engine light coming on or an irregular idle when using LPG, you are not alone. These symptoms can be due to various factors, often solvable with proper diagnosis and maintenance. In this guide we will analyze the most common causes and possible solutions to restore your LPG system to full efficiency.
1. Main causes of engine light on and irregular idle
Air-fuel mixture not optimal
One of the most common causes of these problems is an incorrect calibration of the LPG system. If the air-fuel mixture is too rich or too lean, the engine control unit detects the anomaly and turns on the warning light. This can lead to symptoms such as unstable idling, especially on LPG.
Solution:
- The LPG control unit must be reprogrammed to optimize the mixture. This requires specific diagnostic tools and a road test to verify the parameters in real time.
Dirty or malfunctioning LPG injectors
The injectors are responsible for dosing the amount of LPG introduced into the engine. If they are obstructed or malfunctioning, the engine does not receive the correct supply of fuel, causing irregularities in operation.
Solution:
- The injectors should be checked, cleaned or replaced if necessary.
Faulty lambda sensor
The lambda sensor measures the amount of oxygen in the exhaust gases to regulate the air-fuel mixture. If it does not work properly, the engine cannot adapt to the operating conditions, causing errors and the warning light to come on.
Solution:
- Test the lambda sensor with a multimeter and replace if malfunctioning.
Pressure reducer not adjusted correctly
The reducer converts LPG from liquid to gaseous state and regulates its pressure. Too high or too low a pressure can compromise combustion.
Solution:
- Check the reducer pressure and adjust it according to the system specifications.
2. Diagnosis and necessary interventions
Diagnosis via OBD-II and dedicated software
Accurate diagnosis is the first step to solving the problem. Using an OBD-II scanner and dedicated BRC software, you can accurately identify the errors stored in the engine control unit.
LPG mapping reset
The mapping must be adapted to the specific engine of your Lancia Ypsilon. This includes:
- Air-fuel ratio adjustment.
- Optimization of idle and transitions between petrol and LPG.
Fuel system check
- Check LPG injectors for deposits or malfunctions.
- Inspection of the pressure reducer and check its tightness.
- Check pipes for gas leaks.
3. Future prevention
Regular maintenance of the LPG system
A well-maintained LPG system provides optimum performance and reduces the risk of problems. Here's what to do:
- Cleaning the injectors: every 20,000-30,000 km.
- Check reducer pressure: annually.
- Check the lambda sensor: every 40,000 km or in case of anomalies.
High quality LPG supply
Poor quality fuels can cause deposits in injectors and other components. Look for reputable distributors to minimize the risk.
4. When to contact a professional
If problems persist after initial work, it is advisable to contact a certified BRC installer. Ask for a full diagnosis and ensure that the installer:
- Have experience with your type of vehicle.
- Use up-to-date diagnostic tools.
- Perform a road test to verify the effectiveness of the interventions.
Conclusion
LPG system problems, such as the engine light on and irregular idling, can be solved with targeted interventions and proper maintenance. Relying on an experienced professional and taking preventive measures is essential to ensure optimal performance and vehicle safety.
Don’t ignore these signs: taking timely action can prevent major damage and ensure your car will run efficiently for many years to come.
