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 Posted: Tue Mar 24, 2015 6:39 am |
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Joined: Mar 24, 2015
Posts: 4
Trade Rating: 0
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Sup guys my engine management light came on the other day, Pluged it up and got this.
p0420 generic catalyst system efficiency below threshold bank 1
oxygen sensor? Or is the catalytic converter naffed?
Cheers Marc
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Posted: Tue Mar 24, 2015 7:36 am |
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Joined: Jun 23, 2014
Posts: 443
Trade Rating: +8
Location: Warwickshire
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Posted: Tue Mar 24, 2015 3:17 pm |
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Joined: Mar 24, 2015
Posts: 4
Trade Rating: 0
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Cheers mate
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Posted: Tue Mar 24, 2015 3:19 pm |
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Joined: Feb 07, 2010
Posts: 2720
Trade Rating: +6
Location: UK
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Front lambda is knackered.
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Posted: Tue Mar 24, 2015 4:04 pm |
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Joined: Jun 23, 2014
Posts: 443
Trade Rating: +8
Location: Warwickshire
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| Steve206 wrote: |
| Front lambda is knackered. |
Aren't both Lambdas at the front?  
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Posted: Tue Mar 24, 2015 5:22 pm |
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Joined: Feb 07, 2010
Posts: 2720
Trade Rating: +6
Location: UK
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Pre cat lambda.
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Posted: Wed Mar 25, 2015 6:25 am |
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Joined: Jun 19, 2010
Posts: 1600
Trade Rating: +4
Location: South Bucks
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Could also be a leak in exhaust! Had this on our 2.0. Changed the exhaust from manifold to back and faults stopped. There was a crack in the centre box at the rear where it had argued with a speed hump and lost ...
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| Down to just the 1.4 HDi. Cayman Green 2.0i CC sold. | |
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Posted: Wed Mar 25, 2015 3:26 pm |
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Joined: Mar 24, 2015
Posts: 4
Trade Rating: 0
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Cheers guys. Yeh thats what i thought lambda sensor. Ill get one tomorrow and plug it back up see if it chuckes up that fault again.
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