Engine Management Light

[Darklighter]

Hi All,

Great site and very informative.

I have a RAV 4 x reg NRG 3 door. Done 77k. new front pads two weeks ago.

Last Wednesday I had an engine missfire, it was diagnosed as needing a new coil assembly on cylinder 2 All fixed by the Friday. All working okay but as I drove home the engine light came back on again. I took it back on Monday to the local garage which are specialists in Toyota and they read the chip which said

P0420 Catalyst system efficiency below threshold bank 2

P0420 Catalyst system (history) efficiency below threshold bank 1

They reset the engine chip again, took for a spin and said should be okay, but drive home and within 10 miles light back on again.

My question is what does the above computer codes mean, what should I try to get this problem fixed i.e. parts / part number / costs

Nick

[anchorman]

Be careful!

One owner on the attached site has changed oxygen sensors and entire exhaust including cats and still has the fault.

I have to go out so haven't the time to trawl now but you can. I'll have another look later.

Cheers

http://www.obd-codes.com/forums/viewforum.php?f=1

[bothwell_buyer]

what does NRG stand for?

[pmb]

Sunday Times motoring section had this question a few months ago.Rav 4 P0420 code sensors OK. Answer briefly was get the dealer to run a 4 gas analysis test and if it is the cat it suggested a replacement from www.carparts-direct.co.uk If you wish to see the full Q & A feel free to pm your e-mail and I will scan it. Code you cite is a common one and it means the catalytic converter is working below its peak efficiency the article says.

[bothwell_buyer]

Rip the cat oot I say!!

I did and i've never been happier......

[Darklighter]

Sunday Times motoring section had this question a few months ago.Rav 4 P0420 code sensors OK. Answer briefly was get the dealer to run a 4 gas analysis test and if it is the cat it suggested a replacement from www.carparts-direct.co.uk If you wish to see the full Q & A feel free to pm your e-mail and I will scan it. Code you cite is a common one and it means the catalytic converter is working below its peak efficiency the article says.

Hi pmb,

Thanks for info on the article, I have sent you my e-mail address

Nick

[FLYINGJETMAN321]

Area Application : Europe

Model Name : YARIS, TOYOTA RAV4, AVENSIS VERSO, PICNIC, PREVIA,

TARAGO

Model Code : ALL

Subject : Handling of DTC "P0420/P0430" Case by Models

This service bulletin is to inform you on how to handle "DTC P0420 / P0430" cases for Yaris, Previa /

Tarago, RAV4, Avensis Verso / Picnic.

DESCRIPTION OF PHENOMENON

• Engine MIL ON.

• Code P0420 or P0430 in the engine ECU.

• No influence on driveability or engine performance.

The above Toyota Service Bulletin was issued in May 2005, as you can see it not only affects the Previa but a lot of other models as well. The fact Toyota issued this bulletin proves that they knew there was a problem, yet only last month Toyota GB Customer Services denied any knowledge of it! A faulty batch of catalytic converters fitted to the Toyota range means they are not fit for purpose and under the Sale of Goods Act you can take the retailer to court if this fault occurs within 6 years of purchase. A new cat will cost between £1200-1400, making a claim through the small claims court will cost £60-70 and can be done on-line at https://www.moneyclaim.gov.uk/csmco2/index.jsp Make sure you read the leaflets, or even better make an appoinment with your local Trading Standards Office. The bulletin goes on to state;

"If, based on the sensor signals, you judge catalyst is not working properly, replace catalyst and not the O2 sensors".

This is a copy of a thread on the Previa forum please see

http://toyotaownersclub.com/forums/index.p...=20#entry722352

and if you want to do something about it go to to;

http://www.bbc.co.uk/consumer/tv_and_radio...transport.shtml