wolfgangswift8
Skoda Kamiq NOx Catalyst Error and Possible Exhaust Leak
Summary of the thread
A 2023 Skoda Kamiq owner reported a check engine light and a diagnostic error related to NOx storage catalyst aging, suspecting an exhaust leak. The issue could stem from a small exhaust leak affecting oxygen sensors, leading to incorrect air/fuel ratio readings and overloading the NOx catalyst. The suggested solution was to inspect and repair the exhaust leak, which was confirmed and resolved by a workshop.
Did this summary help you solve your problem?
4 comment(s)
wolfgangswift8 (community.author)
The exhaust leak isn't super obvious, but I have noticed a slight smell sometimes. You mentioned oxygen sensors being thrown off. Could that really cause the NOx catalyst to appear aged prematurely in the car diagnostics? I thought those sensors were more for fuel trim and general engine management.
johanna_schmidt68
Absolutely, a small exhaust leak before the catalytic converter can wreak havoc. The engine control unit (ECU) relies on those oxygen sensors to precisely measure the air/fuel ratio. If there's a leak, unmetered air gets into the exhaust, and the sensors report a lean condition. The ECU then compensates by adding more fuel, which can overload the NOx catalyst and make it appear aged or inefficient in car diagnostics. Given your symptoms and the exhaust leak suspicion, I'd bet money on that being the root cause. I'd advise taking it to a reputable workshop to confirm and fix the leak. It's the most likely issue in the emissions system.
wolfgangswift8 (community.author)
Just wanted to let you know, you were right. The workshop confirmed a small leak in the exhaust system. Repairing it plus a new gasket cost 265€. Thanks again for your help!
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
SKODA
community_crosslink_rmh_model
KAMIQ
johanna_schmidt68
Whoa, NOx storage catalyst issues on a relatively new Skoda Kamiq? That's unusual. It sounds like you've already done some car diagnostics, which is great. A leak in the exhaust system could definitely be the issue, as it messes with the oxygen sensors and throws off the whole emissions system's balance. Think of it like trying to bake a cake with a hole in your oven – the temperature won't be right, and things won't cook evenly. Is the exhaust leak noticeable? Can you hear it, or smell exhaust fumes more strongly than usual?