- Check the diesel particulate filter (DPF). The DPF is responsible for trapping soot and other pollutants from the exhaust gas. If it becomes blocked, it can cause the engine to go into limp mode and display the antipollution fault message. You can try to clean the DPF by driving at high speeds (more than 60 mph) for at least 30 minutes. If this doesn't work, you may need to have the DPF replaced.
- Check the EGR valve. The EGR valve (exhaust gas recirculation) valve is responsible for recirculating a portion of the exhaust gas back into the engine. This helps to reduce emissions, but it can also become clogged over time. If the EGR valve is clogged, it can cause the engine to go into limp mode and display the antipollution fault message. You can try to clean the EGR valve by removing it and spraying it with a cleaner (e.g., carburetor cleaner). If this doesn't work, you may need to have the EGR valve replaced.
- Check the turbocharger. The turbocharger is responsible for compressing the air that enters the engine. If the turbocharger fails, it can cause the engine to lose power and display the antipollution fault message. You can check the turbocharger by looking for leaks or damage to the hoses and pipes. You can also try to boost the engine by increasing the throttle pressure. If this doesn't work, you may need to have the turbocharger replaced.
- Check the fuel injectors. The fuel injectors are responsible for injecting fuel into the engine. If a fuel injector fails, it can cause the engine to run rough and display the antipollution fault message. You can check the fuel injectors by looking for leaks or damage to the hoses and pipes. You can also try to clean the fuel injectors by using a fuel injector cleaner. If this doesn't work, you may need to have the fuel injectors replaced.
If you have tried all of the above steps and the antipollution fault message is still displayed, you should take your car to a qualified mechanic for further diagnosis and repair.
