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P0420 and Scanner

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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jbade
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jbade

P0420 and Scanner

Post by jbade » Tue Nov 19, 2019 8:56 am

2011 XC90 3.2 about 113k (1 owner)

Exhausted started to go, started throwing the p0420 code (I think possibly others as well) But really thought everything was because of the massive holes in the exhaust.

Replace the two pipes in the middle.
The ones that come off the Manifold/Cat that has the flex pipe in it and then the muffler assembly.

Picked up two new downstream O2 Sensors as well just because I was thinking they might get broken when switching it out.
(Closeout Walker branded on Rock Auto, Big Mistake but they where cheap)

Picked up the truck and Check Engine light was off.
Drove around a few days and it came back.

Now I had the p0420 as well as some O2 codes, can't remember all of them.
I tried to just disconnect the batter as maybe it needs to re-adjust because of the new Sensors.

Drove it again and at about 100 miles light comes back on.

Took it to the dealer this time as I need to pass the emissions test to get the plates renewed and I am running out of time. Spent a bunch of money I didn't have and they replaced the same 2 downstream O2 sensors saying the ones in there where wrong.

OK, picked it up.. Same thing.. at about 100 miles light comes back.
Ran just to the auto parts store for a quick check and it's just the P0420 (no additional codes.) (Bank 1)

Should the Upstream also be replaced as have a mix of old and new be an issue?
Upstream is a wide band I think, where the Down is not. Is that correct?
Could something have loosened in the exhaust causing a leak?
Or is there something else I should look at?

Is there anything I can do to at least get it to pass short term, then worry about the problem as I can afford it? I know to pass the light has to be off and it needs to have all the systems show ready. Which means I need to have some miles on it after any reset.

It is running great, no odd smell/exhaust smell, studdering or anything. Drives fine.

Also what is the best budget Scanner tool I can get off Amazon that I can check codes and reset the computer with?
I wish a cheaper one could show me the actual O2 reading but anything is better than nothing right now.

Thanks,
Last edited by jbade on Tue Nov 19, 2019 2:13 pm, edited 1 time in total.


Jeff
2011 Volvo XC90
2002 Jeep Liberty Limited
1980 International Scout II
1969 International Travelall

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RickHaleParker
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RickHaleParker

Re: P0420 and Scanner

Post by RickHaleParker » Tue Nov 19, 2019 10:18 am

jbade wrote: ↑
Tue Nov 19, 2019 8:56 am
Took it to the dealer this time as I need to pass the emissions test to get the p
Also what is the best budget Scanner tool I can get off Amazon that I can check codes and reset the computer with?
I wish a cheaper one could show me the actual O2 reading but anything is better than nothing right now.
Get a Volvo DiCE clone. Stay away from the blue "Super Dice" they are crap. Ignore the software that comes with it. Come back here and search for 2014D_RePack, use that software instead. The DiCE clone prices are lower on eBay then Amazon.

There are many threads here on P0420.

Use the Forum search at the top of this page to find something.


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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jbade
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jbade

Re: P0420 and Scanner

Post by jbade » Tue Nov 19, 2019 11:18 am

I've spent a few days reading all the p0420 posts.
Nothing jumped out on past posts that "SOLVED" the problem more trial and error and no follow up.
I'll keep looking. I Understand what the error code means so I will have to do the same I guess.
Was hoping it was more of a common issue more than anything.

With the DICE maybe I can actually see the readings on the O2s to figure it out more.
Looks like they all come from China so I'll need to do something sooner as I need to get it to pass.

Bank 1 on the 3.2 is toward the rear (Firewall side) facing the engine, correct?

I know to pass emissions I am ok if 1 system is not ready.
If I reset this code and everything else is good does the system show ready for everything but this 1 system?

At least so I can get it to pass emissions and then dig into it further with more time and money.


Thanks,
Last edited by jbade on Tue Nov 19, 2019 2:13 pm, edited 1 time in total.


Jeff
2011 Volvo XC90
2002 Jeep Liberty Limited
1980 International Scout II
1969 International Travelall

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RickHaleParker
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Re: P0420 and Scanner

Post by RickHaleParker » Tue Nov 19, 2019 11:48 am

jbade wrote: ↑
Tue Nov 19, 2019 11:18 am
I Understand what the error code means so I will have to do the same I guess.
Just about anything that messes with the Air/Fuel ratio can trip P0420.

Possible source
  • Misfiring
    Leakage in the intake system
    Leakage in the exhaust system
    Faulty fuel pressure
    Uneven compression
    Damaged catalytic converter.
Even a cheap scanner will tell if it is misfiring, P0300 - P0308.

You can check for Leakage in the intake system by spraying starting fluid around the intake system, if the engine surges you found a leak. The leak is sucking in the starter fluid. You could Smoke Test the intake system, you would see the smoke come out of the leak.

You can search for leaks in the exhaust system with your eyes and ears but a Smoke Test would be better.

Check the fuel pressure with a Fuel Pressure Gauge.

Check the compression with a Compression Gauge.

Replace Catalytic Converter as an absolute last resort. Catalytic Converters rarely go bad but get way more then their share of blame and they are expensive.

Even when the exhaust is clogged it is more likely to be a clogged Resonator or a clogged Muffler the a defective cat.

Vida-DiCE would give you much better information. Good chance it will retrieve information that is hidden from the cheap generic scanner.

Help in your area has be reactivated. Post there maybe somebody in the Chicago area with Vida-DiCE will give you a hand.
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jbade


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

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jbade
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jbade

Re: P0420 and Scanner

Post by jbade » Tue Nov 19, 2019 12:00 pm

(THANKS)

FYI the Dealer Scan did not detect anything else besides the bad / incorrect downstream O2s, so that is something to consider.

Since it is only complaining about Bank 1, am I safe to assume it wouldn't be Intake system related, or at least intake until things actually split up (at the intake manifold) otherwise I would get both banks with errors?

Does a P0420 clear itself? So far I have not seen the light ever go off. Or does it staying on mean the problem is constant?

Bank 1 is the Rear if I am looking at the engine from the open hood? or Number 1 cylinder is on the left looking at the front of the engine (Passenger Side) and bank one is on the left. Do I have that correct?
Last edited by jbade on Tue Nov 19, 2019 2:13 pm, edited 1 time in total.


Jeff
2011 Volvo XC90
2002 Jeep Liberty Limited
1980 International Scout II
1969 International Travelall

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RickHaleParker
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RickHaleParker

Re: P0420 and Scanner

Post by RickHaleParker » Tue Nov 19, 2019 12:22 pm

Which engine do you have? 5, 6, 8 ?


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

wanderdüne
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wanderdüne

Re: P0420 and Scanner

Post by wanderdüne » Tue Nov 19, 2019 12:23 pm

The DiCE are all made in China; but you can get one from a US seller pretty rapidly. Alternatively, you could reach out on this forum or on swedespeed and see if anyone local to you could help out with their VIDA/Dice. In the classifieds here and there, also people are sometimes selling their complete systems, so you could look here and there.
The one scanner that will read the Volvo codes that I know of is the iCarsoft i906. I have one and it does work really well and has good functionality. The VIDA DiCE is by far the better choice, though, because it has all of the diagnostics and repair info contained in the VIDA.

I looked at my VIDA for your model XC90 and it says like the likely culprits are a leak in the exhaust system or barring that the upstream heated O2 sensor bank 1. If neither of those; it says to replace the catalyst. The VIDA does have some testing further using the DiCE link; but those are the three things, in that order.

Bank 1 is cylinders 1,2,3 and is on the passenger (right) side. I will say, that although you can pass with one system not ready, the Volvo likely will not show a ready for emissions test period after a code delete until you have done a drive cycle and the Leak Detection has done it's thing. Here is the Volvo directions for that: http://new.volvocars.com/ownersdocs/200 ... ection.pdf
Here it is just written out in post 2: https://forums.swedespeed.com/showthrea ... rive-cycle
Otherwise just driving around; it can take a good long while to reset. Helpful to have even a generic OBDII reader that is capable of indicating if the vehicle is test ready before going in for the test.

****EDIT****
Also, the fuel tank should be between 1/4 and 3/4 or the evap test may not complete.
Last edited by wanderdüne on Tue Nov 19, 2019 1:52 pm, edited 1 time in total.
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jbade



User avatar
jbade
Posts: 6
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jbade

Re: P0420 and Scanner

Post by jbade » Tue Nov 19, 2019 1:03 pm

RickHaleParker,
3.2 V6 (2011)

WanderDune,
Upstream O2s are probably due at 113k (Miles), although I really need to try and see what the variance is between the two to be sure.
Trying not to throw parts at a problem it may not be.

While the exhaust was replaced it's possible a bad gasket, something not tightened down, etc. I'll try and check best I can. The warmer week will make it easier to crawl around.

I'm borrowing a basic scanner for the readiness and see how fast it throws the error, maybe I can get it to pass really fast. These readiness procedures are great! never knew this existed. Thank you!


Jeff
2011 Volvo XC90
2002 Jeep Liberty Limited
1980 International Scout II
1969 International Travelall

User avatar
RickHaleParker
Posts: 3210
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
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RickHaleParker

Re: P0420 and Scanner

Post by RickHaleParker » Tue Nov 19, 2019 2:20 pm

jbade wrote: ↑
Tue Nov 19, 2019 1:03 pm
RickHaleParker,
3.2 V6 (2011)
3.2 SI6 (Short Inline 6 cylinder)
These users thanked the author RickHaleParker for the post:
jbade


Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

User avatar
jbade
Posts: 6
Joined: Tue Nov 19, 2019 8:31 am
Year and Model: 2011 XC90
Location: Chicago
Has thanked: 3 times
Been thanked: 0
United States of America
jbade

Re: P0420 and Scanner

Post by jbade » Tue Nov 19, 2019 2:54 pm

Guess I always thought it was a V because of the Dual Pipes underneath never really paid attention to what the block really was.
It's been so reliable haven't had to do much to it all this time either.


Jeff
2011 Volvo XC90
2002 Jeep Liberty Limited
1980 International Scout II
1969 International Travelall

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