P0420 code - Toyota Yaris Forums

Bluevitz-rs · 01-01-2016, 08:24 PM

It's running on stock numbers out of boost 95% of the time. Only past 1psi that there any mods to fuel and timing. So it runs 14.7afr out of boost.

I've got new plugs to go in too when I change the oil and wrap the pipes.

Only reason I'm thinking it's not hot enough to is that the stock exhaust before the Cat was a double wall pipe and that would definitely keep the heat in.

CTScott · 01-01-2016, 08:39 PM

Quote:

Originally Posted by Bluevitz-rs

It's running on stock numbers out of boost 95% of the time. Only past 1psi that there any mods to fuel and timing. So it runs 14.7afr out of boost.

I've got new plugs to go in too when I change the oil and wrap the pipes.

Only reason I'm thinking it's not hot enough to is that the stock exhaust before the Cat was a double wall pipe and that would definitely keep the heat in.

That is definitely possible. Do you perchance have a diagnostic device that will let you watch the sensor data from the two O2s?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
The Official "Bamboo the Yarisworld Traveler" Thread (v4, part 2)	Darb	Off-topic / Other Cars / Everything else Discussions	86	10-18-2017 09:03 AM
Help and Advice please Code - P0141 and P0420	bechdan	DIY / Maintenance / Service	16	07-15-2014 06:28 AM
Our Nissan Leaf review	Thirty-Nine	Off-topic / Other Cars / Everything else Discussions	39	12-17-2013 10:13 PM
full tank	japle	Fuel Economy Forum	15	12-10-2013 12:05 PM
Sponsors List	RogueYaris	Sponsors Classifieds Area	14	01-05-2013 11:23 PM

01-01-2016, 08:24 PM	#1
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	It's running on stock numbers out of boost 95% of the time. Only past 1psi that there any mods to fuel and timing. So it runs 14.7afr out of boost. I've got new plugs to go in too when I change the oil and wrap the pipes. Only reason I'm thinking it's not hot enough to is that the stock exhaust before the Cat was a double wall pipe and that would definitely keep the heat in.