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Quick Links: Viper 4015v Remote Start New Tundra! And a SW control question Adding fog lights to a 2006 Gen 1 base model V6 Two easy shock questions Lower oil pan replacement Just tooling along...

2002 Tundra 3.4 V6

Discussion in '1st Gen Tundras (2000-2006)' started by jimmytundra, Oct 3, 2024.

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Mar 15, 2025 at 6:04 PM

#31

#31
shifty` Just like witches at black masses

Joined:

Jun 20, 2020

Member:

#48239

Messages:

28,377

ATL

Vehicle:

'06 AC Limited V8/4WD

(see signature for truck info)
jimmytundra[OP] said: ↑

Yes, I only did the one. I think it was the upstream. My mechanic checked and said the voltage readings showed the downstream was still good. I’ll look into the upstream one too. It’s so pricey :/
Click to expand...

Always replace in pairs. Here's why, taken from the community megathread.

Cat inefficiency codes P0420 and P0430: Strong chance it's not your cats. Read why HERE.

Seriously. @KNABORES nailed it. If your mechanic isn't experienced with these trucks, they won't know any better.

Cat cleaners are a gimmick. Snake oil. Don't waste your money.
shifty`, Mar 15, 2025

#31

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