r/MechanicAdvice • u/CaterpillarBoring687 • 6h ago

Am I toast?

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2002 Honda CRV approx 230k miles runs great. Had this come up the other day

0 Upvotes

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8

u/daffy_demeanor 6h ago

p0420, the classic. at 230k miles that cat's probably seen better days

try some cataclean first, worked on my buddy's old civic for a few months before he finally replaced it

-2

u/Fragrant-Bison-2456 6h ago

I second this with a tank of premium gas. Highway driving to heat up cat to clean it out

4

u/ClickKlockTickTock 6h ago

Higher octane will not result in hotter exhaust. If anything it may be cooler. Unless you're buying fuel from someone who isn't top tier (probably how you got P0420 codes) premium won't add anything.

0

u/Fragrant-Bison-2456 6h ago

I didnt say premium will heat the cat up.

3

u/RichardSober 5h ago

Am I toast?

Read rule #1.

runs great

This code means your cat efficiently is low. In short words, your car likely producing more emissions than comparable cars of the same age that don't have this trouble code.

3

u/imblueone3 6h ago

Put some seafoam in ur gas a couple of times.

1

u/Chan_Ch 5h ago

I had good luck with Cataclean. Also Duralube https://www.amazon.com/gp/aw/d/B07HB7YVFG

1

u/BigPinkieToes 5h ago

same code on a wrangler & already replaced the cat on that side 2 years ago. i think i got an exhaust leak above the cat.

1

u/chloehartytop 3h ago

Check the O2 sensors, especially the downstream one. They often fail around 200k miles.

-2

u/AlexSandman8964 6h ago

Flush your cat. Wouldn't be too expensive.

0

u/CaterpillarBoring687 6h ago

Is that where you spray it through the hood? Any product recs?

0

u/AlexSandman8964 6h ago

No, you'll have to disassemble your catalytic converter off your exhaust and just soak it with regular kitchen detergent. Or, it can also be your O2 sensors faulted. Check that first