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Author Topic: P0420 - Catalyst Efficency Above Threshold - on 2.2  (Read 6951 times)

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tunnie

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #30 on: 01 April 2015, 10:53:12 »
Quote from: steve6367 on 01 April 2015, 10:47:24
Wow, that was stuffed!

Just made some calls and can get the flexi replaced today for £120 - might have to go for that given the time pressure  :-\

This was just a few days earlier, it can quickly break apart once it's started to go:

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tunnie

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #31 on: 01 April 2015, 10:54:39 »
Quote from: tunnie on 01 April 2015, 10:50:32
Quote from: steve6367 on 01 April 2015, 10:47:24
Wow, that was stuffed!

Just made some calls and can get the flexi replaced today for £120 - might have to go for that given the time pressure  :-\

What is the breakdown on that?

Part is ~£10...

http://www.ebay.co.uk/itm/2-UNIVERSAL-51MM-EXHAUST-PIPE-FLEXI-FLEX-REPAIR-TUBE-JOIN-2-X-4-650100-/371144483891?pt=LH_DefaultDomain_3&hash=item5669ef6433

Took all of master around 30mins maybe to change? Including a tea break!

Also, any place that does the work, ensure it's put together right afterwards, otherwise it won't line up for the exhaust bolts.  :y
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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #32 on: 01 April 2015, 12:33:12 »
£120 to supply part, remove, weld new part in and refit. I offered to bring just the CATs but they wanted the car to ensure correct alignment  :y

I would rather do it myself and save but I need to use the car to go to Doncaster and back Monday and its a bank holiday Friday.

I just hope I don't find out the CAT is stuffed after all this!
« Last Edit: 01 April 2015, 12:38:30 by steve6367 »
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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #33 on: 01 April 2015, 12:36:17 »
Quote from: steve6367 on 01 April 2015, 12:33:12
£120 to supply part, remove, weld new part in and refit. I offered to bring just the CATs but they wanted the car to ensure correct alignment  :y

I would rather do it myself and save but I need to use the car to go to Doncaster and back Monday and its a bank holiday Friday.

I just hope I don't find out the CAT is stuffed after all this!

No idea how I posted that twice!
« Last Edit: 01 April 2015, 12:38:01 by steve6367 »
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tunnie

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #34 on: 01 April 2015, 14:07:38 »
Quote from: steve6367 on 01 April 2015, 12:33:12
£120 to supply part, remove, weld new part in and refit. I offered to bring just the CATs but they wanted the car to ensure correct alignment  :y

I would rather do it myself and save but I need to use the car to go to Doncaster and back Monday and its a bank holiday Friday.

I just hope I don't find out the CAT is stuffed after all this!

Difficult to say, I've never had emissions light on. Even when it's completely blown, and not even connected to the exhaust.  :-\
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flyer 0712

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #35 on: 01 April 2015, 17:03:49 »
Strange that......blueron......should have stated that about his 2.2 with the emissions light coming on and changing fuel cured it.....I have never had a 2.2 that the emissions light came on until now.....After a week or so of  owning this latest one the light came on.....I put cat clean through the system just as a matter of service and after a few days .out went the light....so all was good....i dont do a lot of miles and I always use shell v.plus petrol....on my return from Nottingham i ran low on fuel so stopped to get some and by mistake put in ordinary unleaded and a day later on came the light again....having read ...bluerons....item on here i wondered if that was the reason for my light coming on,so i filled up with v,power and a day or so after out went the light....Now is this just coincidence  or what...as surely the motor is meant to run ok on ordinary unleaded is it not...... :-\ :-\ :-\

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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #36 on: 01 April 2015, 17:48:25 »
O2 Sensor 1 (pre CAT:



O2 Sensor 2 (post CAT):



Should sensor 2 be cycling like that? Or static?

Many thanks

Steve

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TheBoy

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #37 on: 01 April 2015, 21:54:33 »
CAT looks stuffed to me :(

Get a good 2nd hand one.

For Monday, just drive it with the EML on, if time is against you. The cat is stuffed anyway.
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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #38 on: 01 April 2015, 22:23:20 »
Quote from: TheBoy on 01 April 2015, 21:54:33
CAT looks stuffed to me :(

Get a good 2nd hand one.

For Monday, just drive it with the EML on, if time is against you. The cat is stuffed anyway.

Thank you

It should be a straight line? Lean?

Quandary now is weather to risk the flexi falling apart or get that welded up and then deal with the CAT later.

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tunnie

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #39 on: 01 April 2015, 22:29:34 »
Depends how long before its changed, could survive a bit longer
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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #40 on: 01 April 2015, 22:33:23 »
Am I feeling lucky....  :D
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Marks DTM Calib

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #41 on: 02 April 2015, 08:50:52 »
If the flexi is goosed then air will be drawn in after the mixture control O2 sensor.....the result will be the code you are seeing.
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steve6367

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #42 on: 02 April 2015, 16:19:27 »
The noise has stopped, although based TB's comments I suspect the CAT may still give me issues - I will report back!



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Steve B

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #43 on: 02 April 2015, 17:59:50 »
Well That was quick  :y
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TheBoy

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Re: P0420 - Catalyst Efficency Above Threshold - on 2.2
« Reply #44 on: 02 April 2015, 19:20:08 »
Quote from: Marks DTM Calib on 02 April 2015, 08:50:52
If the flexi is goosed then air will be drawn in after the mixture control O2 sensor.....the result will be the code you are seeing.
But to exactly follow front sensor?  :-\
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