dominikvogel5
Volt NOx Storage Catalyst Aging
Summary of the thread
A 2015 Chevrolet Volt hybrid with 118,392 km has a check engine light on, and diagnostics suggest NOx storage catalyst aging, potentially linked to an exhaust leak. An exhaust leak can affect oxygen sensor readings, leading to incorrect diagnostics of the catalyst's efficiency. It is recommended to inspect and repair the exhaust system to resolve the issue before assuming the catalyst itself is failing.
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4 comment(s)
dominikvogel5 (community.author)
The error code points directly to the NOx storage catalyst. Based on your Volvo experience, could a minor exhaust leak trigger such a specific diagnostic, or is it more likely a failing catalyst, made worse by the leak?
georgberger1
In my case, the exhaust leak was the culprit. It messed with the oxygen sensor readings, affecting the catalytic converter's efficiency. It's like trying to bake a cake with a broken oven; the ingredients might be fine, but the end result is off. I'd suggest having a workshop check the exhaust system before blaming the catalyst.
dominikvogel5 (community.author)
Based on your experience, I prioritized checking the exhaust system for leaks. The diagnosis confirmed a leak in the exhaust system, leading to an aging NOx storage catalyst. The repair cost was 265€.
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CHEVROLET
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VOLT
georgberger1
That's a pickle! I had a similar issue on my 2012 Volvo C30. The 'check engine' light was on, and diagnostics pointed to catalytic converter inefficiency. It felt like the car was breathing through a straw! Could be a faulty sensor, or even a small hole in the exhaust throwing things off. Was the error code specific to the catalyst?