Common Installation Mistakes
+ Incorrect installation of sensors or disconnection (lambda, temperature, pressure) – can cause incorrect readings and malfunction of the emission management system.
+ Failure to reset the ECU after replacement
+ Installing an incompatible DPF/catalyst – dimensions or parameters different from the original may affect exhaust gas flow and thermal regime
Maintenance Mistakes
+ Long oil change intervals and use of improper engine oil – some oils can contaminate the DPF and accelerate clogging.
+ Predominantly urban driving (without regenerations) – the DPF requires active regenerations (at higher speeds) to burn accumulated particles. If the car is used only in the city, the DPF can clog.
+ Turning off the engine during regeneration – interrupting the regeneration process leads to the accumulation of unburned particles.
+ Using low-quality fuel – gasoline or diesel with high sulfur or lead content can poison the catalyst.
+ Combustion problems (injectors, spark plugs, faulty EGR) – improper mixture leads to carbon deposits that can block the catalyst.
+ Washing with improper methods: some aggressive chemicals can damage the ceramic structure.