janroth27
Seat Leon Diesel power loss and smoke
Summary of the thread
A 2011 Seat Leon diesel is experiencing reduced engine power and smoke during acceleration, suspected to be caused by a defective diesel particulate filter (DPF). A clogged DPF can indeed lead to these symptoms and affect fuel efficiency, potentially causing a vehicle inspection failure. It is suggested to have the DPF and related components, like the backpressure sensor, checked by a professional to diagnose and resolve the issue effectively.
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6 comment(s)
janroth27 (community.author)
Backpressure sensor, huh? Where is that located, and is it something I can check myself without special tools?
karlfire18
Yeah, the sensor is on the DPF itself, usually. Honestly, I wouldn't mess with it too much. In my case, the DPF was completely clogged. The sensor was fine but the backpressure was insane. Take it to a workshop, they'll diagnose it properly. Could save you some headache!
janroth27 (community.author)
Took it to the shop, and you were right. DPF was gone. Cost me 1550€ to replace. Ouch. Thanks for the heads up!
Jonny1
Car doesn't smoke, must turn off the engine and restart, and then full power again.
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CarlyMechanic
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Car doesn't smoke, must turn off the engine and restart, and then full power again.
This could be related to the turbocharger or an issue with the electronic control systems, such as a faulty sensor or actuator. Start by checking for any stored error codes using an OBD-II scanner, as this can provide clues to the underlying issue. If you don't have access to a scanner, many auto parts stores offer free code reading services. Let me know how it goes or if you have any further questions!
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SEAT
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LEON
karlfire18
Whoa, sounds familiar! I had something similar happen with my Leon. Reduced power and some smoke. Have you checked the backpressure sensor? It could be a sensor fault messing things up.