99 Toyota 4Runner 3.4litre p0420

Also including Hino, Daihatsu

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Joined: Sat Aug 29, 2009 4:24 pm

Re: 99 Toyota 4Runner 3.4litre

Postby kev2 » Tue Apr 18, 2017 7:18 am

look at a second cat at only 150K? Something is not right.

Do you have a scanner with ability to see live data? Ideally we want to work ALL DTC's, look at FT's MAP, ECT, then observe the pre and postcat o2 sensor voltages.

I often see with cat failures a previous condition that hastened its failure. Codes not addressed or vehicles MODIFIED.

Sorry but the graphing scanner will be the tool of choice for this troubleshoot. BUT I suspect there is more info or details for this vehicle .

TIP: sensors should come from Toyota.

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