own6volvos Posted March 7, 2006 Report Share Posted March 7, 2006 My dad is taking the 01 V70 into the dealership this week to get the timing belt replaced, and also getting the car to pass emmisions. The thing has had an emmisions fault for about 2 years now on and off. It is code P0420, and sometimes will be off for weeks, then come on again, then go off. Recently it hasn't been off for a while, and obviously can't pass emmisions because the OBD2 won't pass a clean bill of health.What exactly might be the cause behind the P0420 code? Googling it says the cat might not working properly, with others saying the o2 sensors might be a bit off. With the dealer doing this, are they going to push extra parts down our throat that may or may not be needed (new $$$ cat for example), when a single o2 sensor might gix it?Next is what to have done while the tbelt gets replaced. Should the waterpump be done while they are in their? If the next tbelt service is 100k away, wouldn't it be cheaper to get the oil seals and waterpump done now, instead of paying all the labor again just for those little parts? Link to comment Share on other sites More sharing options...
starfish Posted March 7, 2006 Report Share Posted March 7, 2006 The exhaust manifold gaskets may be burned out (very common) and cause that code. Normally on a 105K the timing belt and its tensioner will be replaced. If the other seals or water pump may be leaking, replacing them would certainly be cheaper now but who is to say how long they would have lasted or could that money have been better spent on other more current and necessary needs? Link to comment Share on other sites More sharing options...
starfish Posted March 7, 2006 Report Share Posted March 7, 2006 The exhaust manifold gaskets may be burned out (very common) and cause that code.I assumed this was a turbo engine. If this is a non turbo model, all 5 fuel injectors may need to be replaced.Fill out your signature line please. Link to comment Share on other sites More sharing options...
own6volvos Posted March 7, 2006 Author Report Share Posted March 7, 2006 2001 2.4L v70 n/a (auto) Link to comment Share on other sites More sharing options...
own6volvos Posted December 27, 2006 Author Report Share Posted December 27, 2006 I assumed this was a turbo engine. If this is a non turbo model, all 5 fuel injectors may need to be replaced.Fill out your signature line please.As the year ended, and we had a 25% off coupon, we ended up going with that choice. The dealer was thinking at first it could have been related to some codes throwing with the throttle issue, but after the software update for that this and another code was left over. Finally pushed us more at the fuel injectors and had them all replaced. 400 bucks -25% (still ouch). So far code has been clean for a better part of a week, so we are hoping that finally got it. Just wanted to give a final update if anyone ever searches about this issue. Link to comment Share on other sites More sharing options...
garbergtsi Posted December 27, 2006 Report Share Posted December 27, 2006 Well, i highly doubt that replacing the injectors does anything...i know what your talking about thou, VIDA says to do it in fault tracing.i had this code at 80k on my N/T, replaced the cat and its still good at 120k.its prolly the cat... Link to comment Share on other sites More sharing options...
MadeInJapan Posted December 29, 2006 Report Share Posted December 29, 2006 That's a bank 1 code...usually related to the front 02 sensor not reading right...could be a bad sensor, could also be bad air/gas mixture such as a vacuum leak, MAF that's going and a few other things. Link to comment Share on other sites More sharing options...
own6volvos Posted January 7, 2007 Author Report Share Posted January 7, 2007 Well, i highly doubt that replacing the injectors does anything...i know what your talking about thou, VIDA says to do it in fault tracing.i had this code at 80k on my N/T, replaced the cat and its still good at 120k.its prolly the cat...Well the injectors pepped the car up, and gas mileage is back up. Now the error code is back after a week or so, and oddly enough, it represents itself a bit differently. Before it would show the little !, as well as say "emissions failure" in the message area. Now it just shows the ! symbol, but still has the same P0420. I guess its the next fault tracing item that is the least expensive to replace now. Any idea how much a cat costs? If the next item they suggest is an o2 sensor, I will replace that myself, and if it doesn't work, then I guess cat is next in line. I really hate codes where the car is working just fine, good gas mileage, but just because it is there it is an instant emissions fail (in Wisconsin), and you cant register the car until it passes. Oh yea, the throttle is doing wonderful hiccups after that software update. Does little WOT bursts sometimes, but must be set to ignore that, as it doesn't throw any codes. No codes = no warranty throttle replacement. The fun/sad part is a few years from now, mix in a rear main seal replacement, new throttle if its out of pocket, and emissions part tracing items to hell and back... and the parts replacement cost almost starts to surpass the bluebook value of the car used. Link to comment Share on other sites More sharing options...
MadeInJapan Posted January 10, 2007 Report Share Posted January 10, 2007 The software upgrade is suppose to "smooth" things out, not give your car hiccups. The code and this issue could be related (didn't get the throttle body gasket on right, etc.). Take your car back to the dealer and complain of issues since their upgrade that wasn't there before it. Link to comment Share on other sites More sharing options...
own6volvos Posted January 12, 2007 Author Report Share Posted January 12, 2007 The software upgrade is suppose to "smooth" things out, not give your car hiccups. The code and this issue could be related (didn't get the throttle body gasket on right, etc.). Take your car back to the dealer and complain of issues since their upgrade that wasn't there before it.Well, it has been having the WOT bursts for probably a year now. My dad has become pretty darn acute to pressing the break pedal in time at stop signs and such. Dealer wont do anything beyond the software upgrade because it isn't throwing codes yet, which is required for them to proceed further with throttle replacement. Link to comment Share on other sites More sharing options...
Sinbad Posted January 12, 2007 Report Share Posted January 12, 2007 Did they actually replace the TB or not? Cos you could have the issue of the rheostat contacts being worn out... and there's no software update in the world that will fix that Link to comment Share on other sites More sharing options...
own6volvos Posted January 12, 2007 Author Report Share Posted January 12, 2007 Did they actually replace the TB or not? Cos you could have the issue of the rheostat contacts being worn out... and there's no software update in the world that will fix thatThey have not, and will not until it throws an error code relating directly to the TB :( Link to comment Share on other sites More sharing options...
own6volvos Posted January 29, 2007 Author Report Share Posted January 29, 2007 Oh spectacular. Throttle surging more and more, and they are blaming it on a bad cat. Not the throttle yet. 1300 dollars less rich today. Link to comment Share on other sites More sharing options...
MrWinkey Posted January 31, 2007 Report Share Posted January 31, 2007 Actually I agree it probably needs a cat...however you may try a rear 0/2....in PA we have a 1 year waiver issued for emission testing if you spend $150 towards an emission repair and it still will not pass.The surging very well could be in the ETM which should be warranty? But doubt it's related to the 0420 code Link to comment Share on other sites More sharing options...
Guest Guest Posted January 31, 2007 Report Share Posted January 31, 2007 Well, at least after a day of driving with the new cat the error hasn't showed up (yet), but guess what? That magical surging which was directly caused by a bad cat, is still there. Who would have guessed. Can't wait to hear the dealers logic on that one, but chances are we wont have to listen to anything from them again. We are going to go 45 minutes farther out of our way (this dealer is an hour away from home) to another dealer in a different city. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.