P0431 P0021

4.2 V8 40v Naturally Aspirated - 339bhp
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BadWaz
1st Gear
Posts: 66
Joined: Sun Jan 26, 2014 8:29 pm

P0431 P0021

Post by BadWaz » Thu Feb 06, 2014 11:01 pm

Two fault codes pulled using VCDS.
Last edited by BadWaz on Thu Feb 27, 2014 1:35 pm, edited 1 time in total.
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Rick_RS4
Cruising
Posts: 2882
Joined: Mon Dec 13, 2010 4:37 pm

Re: Fault codes P0431 P0021 - any experience?

Post by Rick_RS4 » Thu Feb 06, 2014 11:35 pm

fault codes take 3 cycles of ignition to store a cel on the dash, so it might come back
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BadWaz
1st Gear
Posts: 66
Joined: Sun Jan 26, 2014 8:29 pm

Re: Fault codes P0431 P0021 - any experience?

Post by BadWaz » Fri Feb 07, 2014 9:28 am

Oh dear.I have a feeling that this is going to cost me. Three days into f***ing ownership :rant:

(This may simply be due to a required oil change, as the fault codes have not returned during todays driving - (for any future search results))
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BadWaz
1st Gear
Posts: 66
Joined: Sun Jan 26, 2014 8:29 pm

Re: Fault codes P0431 P0021 - any experience?

Post by BadWaz » Wed Feb 12, 2014 2:31 pm

Intermittent sticking solenoid for cam chain tensioner (occurred once), and emission (catalyst) error due to full Miltek system.
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