P00021 Intake Cam Advanced
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AudiWorld Newcomer
Joined: Jul 2003
Posts: 4
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From: San Jose and Sonora, CA
P00021 Intake Cam Advanced
400 miles after replacing all the seals which leak on my 2001 2.8l Avant I got a P00021 with CEL. BANK 2 is the driver side so I opened it back up to find a piece of a broken chain tensioner rail wedged under the tensioner. This kept it fully advanced regardless of what the computer told it to do. I've ordered the new rails and will install next week. My advice is to replace the bakelite (brown) rails with the hard plastic. Search Amazon for the right ones. The hard plastic seems less brittle and possibly less subject to cracking. This has got to be a rare event. Thankfully.!
AudiWorld Member
Joined: Nov 2005
Posts: 501
Likes: 2
400 miles after replacing all the seals which leak on my 2001 2.8l Avant I got a P00021 with CEL. BANK 2 is the driver side so I opened it back up to find a piece of a broken chain tensioner rail wedged under the tensioner. This kept it fully advanced regardless of what the computer told it to do. I've ordered the new rails and will install next week. My advice is to replace the bakelite (brown) rails with the hard plastic. Search Amazon for the right ones. The hard plastic seems less brittle and possibly less subject to cracking. This has got to be a rare event. Thankfully.!
some failures on engines with over 150,000 miles that cause severe misfiring on all cylinders of one cylinder bank at low speed.
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