tomblaze5
Seat Tarraco exhaust back pressure sensor issue
Summary of the thread
A 2021 Seat Tarraco with a gasoline engine is experiencing a malfunctioning exhaust back pressure sensor, indicated by a warning light and diagnostic results. The vehicle is also emitting smoke during acceleration, and the Diesel Particulate Filter (DPF) is not regenerating. The problem is likely due to the faulty sensor, which can cause issues similar to a kinked hose, leading to pressure build-up. The recommended solution is to have the sensor checked and replaced by a workshop, which resolved the issue in this case.
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4 comment(s)
tomblaze5 (community.author)
Interesting analogy! So, with your Megane, did the vehicle diagnostics also point to the back pressure sensor? What exactly was happening?
magdalenawinkler6
Yep, the diagnostics pointed directly at the back pressure sensor. Basically, the car went into limp mode and the engine felt like it was suffocating. If your DPF isn't regenerating either, it's probably the same issue. I'd suggest getting it checked by a workshop ASAP.
tomblaze5 (community.author)
The back pressure sensor was indeed the culprit. Replacement cost 245€. Thanks for sharing your experience; it really helped point me in the right direction.
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SEAT
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TARRACO
magdalenawinkler6
Whoa, sounds rough! Had something similar happen with my old Renault Megane, although it wasn't chucking out smoke. Is it like when your garden hose gets a kink and the pressure builds up?