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Potential causes for the DPF light coming back on in a 2010 Seat Ibiza 1.6 TDI after cleaning are:
DPF re-clogging - If the DPF is not properly regenerating, it can re-clog and trigger the light.
Sensor malfunction - The sensors monitoring the DPF and exhaust system may be faulty, causing the light to come back on.
Software problem - A software issue could trigger the DPF light even if the DPF is functioning normally.
DPF damage - The DPF may have been damaged during the cleaning process, requiring replacement.
It's advisable to have a professional diagnose the issue using specialized diagnostic equipment. A qualified technician can determine the root cause of the recurring DPF light.
hi
possibly the EGR valve is blocked.
one way to clear it. by taking it to a high way. drive in lower gear and more speed to clear EGR.
otherwise remove the egr valve and connecting pipe and clean the build up carbon.
there is a problem with the timing chain tensioner on these models, which causes poor driveability, normally the engine management lamp would be illuminated too
Since exhaust gas (therefore lots of carbon) runs through the EGR it isn't uncommon for them to fail. Sometime a simple cleaning can put them back in service. You'll have to remove the vavle and use a strong cleaner (like carb or brake parts cleaner) to remove the carbon. Clean the valve and the area where the valve bolts to the engine. I've known this to save many people hundreds of dollars in a wasted repair. Good luck.
Hi, The EGR valve itself is on a set of flexible pipework - usually stainless steel - which runs between the inlet manifold and the exhaust manifold. The EGR actuator valve is pneumatically / vacuum operated by a solenoid valve, controlled by the ECU ( aka the brane). It's not usual for the EGR valve itself to fail, more likely the solenoid valve or its electrical connector getting dirty. If you google for VAG TDI N75 valve you should get all the info you could possibly ever need :-)
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