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my friends lancer is throwing a code (p0421) which is warmup catalyst efficiency below threshold.
is that just a fancy way of saying that an o2 sensor went out?
is that just a fancy way of saying that an o2 sensor went out?
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Abbott long tubes,homemade true duals,slp ram air,whisper lid,eibach springs,kyb shocks,BMR subframe connectors, BMR LCA reloc brackets,BMR LCAs. T-top/manual converted -
Re: friends lancer....
sounds like possible cat conv. issues? Not sure how the lancer codes work though -
Re: friends lancer....
i looked up some info on lancers and they have 2 o2 sensors, one before the cat and one after the cat.
if the code says warmup catalyst efficiency below threshold (bank 1)
what does bank 1 refer to? is that the sensore before the cat?
Abbott long tubes,homemade true duals,slp ram air,whisper lid,eibach springs,kyb shocks,BMR subframe connectors, BMR LCA reloc brackets,BMR LCAs. T-top/manual convertedComment
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Re: friends lancer....
check a lancer thread, better luck there. car manufacturers could change things upComment
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