Question about Saturn Astra
I bought a used astra. It had a p0420 code on it, and it would come up every few hundred km. I replaced the flex pipe, and muffler, and there are no noticeable leaks. I changed the downstream o2 sensor and installed a spacer to decat it. When I do this, I get p0141 for some reason, and it goes away when I take it off. Is there a reason for this? I really dont want to spend hundreds on an aftermarket cat only to find out I will get the same code
Hi , A PO420 code on all cars and trucks is a bank 1 cat failure and this code is determined by the ECM (Engine Control Module) by 2 sensors the Up stream O/2 sensor (otherwise known by some car manufactures as a Air/fuel sensor) and the down stream O/2 sensor. If you remove the Cat you will still receive a code due to the down stream O/2 is looking for certain gases which is produce only by the Cat as exhaust gases is passing through it. So yes there is no way around it if your getting a PO420 it is best to first take your car into a reputable shop to find out what is causing the cat to fail in the first place ( most likely due to O/2 sensor failure ) and possibly other things that could of failed leading to O/2 sensor failures along with the Cat.
Hope this answers your question.
Posted on Dec 27, 2016
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Posted on Jan 02, 2017
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