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Found 4 results

  1. Hi all, my gs450h has a blowing centre section exhaust, i assume its the original. The car has done 327k miles, yes you read that right. Occasionally the EML comes on, with error code p0420, Search Results P0420 LEXUS Catalyst System Efficiency Below Threshold Bank 1 I can clear it, but it does come back after a few days, the problem is no doubt related to the blowing. Can these be got as used parts? Im struggling to find one. Do these have just the one CAT, or two? cheers all!
  2. Hi Guys, Wonder if you could help, I have got the EML now being displayed on the dash. Have code read the fault and it has come back with P0420 'Catalyst System Efficiency Below Threshold Bank 1'. I know that this code can be triggered by many things such as an air leak in the exhaust, lambda sensors (but usually P01?? code is usually triggered) I have read the freeze frame data but im wondering if there is anyone that could understand the data more than what I can. From what I've read up on, the SHORTFT and LONGFT should be as close to 0 as possible. However from the freeze frame data you can see that the SHORTFT has a positive reading and the LONGFT has a negative reading where its trying to compansate and correct the fuel mixture. What I am wondering is, from this freeze frame data, could someone diagnose where for me to start replacing parts. I'm hoping that this is just a lamda sensor issue, I have already replaced the pre cat lamda sensor on Bank 1 (Denso part no DOX-0236). Without this help, my next step would have been to replace the lamda sensor by the main cat (not sure of the Denso part number for post cat sensor), so that bank 1 has had a replacement sensor before and after the cat, to see if this clears the code. I know that I might need to replace the cat, but at this moment in time I am trying the cheapest option first to resolve the issue. But all of your opinions are welcome. Here's the freeze frame data: Other data from code reader: I hope someone on this site can point me in the right direction. Many thanks, Dean
  3. hi, i have bought a 2008 is220d se-l with 71000 miles on it from lexus derby they told me that the cat was changed 12 months ago. just a quick one if they change the cat do they change the dpf aswell or is that separate to the cat? cheers
  4. Hi Guys, Quick question? Looking at buying a stainless manifold and high flow stainless cat. Thoughts? http://www.ebay.co.uk/itm/LEXUS-IS200-1G-FE-2-0-98-05-EXHAUST-DECAT-MANIFOLD-MF6547-/110814501437?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item19cd0f1a3d http://www.ebay.co.uk/itm/LEXUS-IS200-STAINELESS-STEEL-EXHAUST-HIGH-FLOW-CAT-DOWNPIPE-DP7935U-/310382440708?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item48443c3104 Will fitting these put my engine managment light on? If so, how would i get around it? Thanks, Matthew