Audizine - An Automotive Enthusiast Community

Results 1 to 20 of 20
  1. #1
    Established Member Two Rings BryMFL's Avatar
    Join Date
    Apr 20 2007
    AZ Member #
    17445
    My Garage
    '02 Audi 1.8T Quattro
    Location
    Winter Haven, FL

    Unhappy Code P0012 How serious is this?

    Guest-only advertisement. Register or Log In now!
    I'm 800 miles from home and got an engine light on. I had Advanced check it and they gave me: Code P0012" Camshaft Position Actuator A-Bank 1 Timing over Retard". I called Audi service and they said something about the camshaft tensioner chain was loose. How bad is this and is it something I can fix? I did the entire timing belt/water pump service back in Spring time so I should be able to get this. Please feel free to put in your two cents. Thanks
    "BryMFL"
    Bryan Meeks
    "Quattro- It's like having your very own roller coaster ride!"

  2. #2
    Veteran Member Three Rings fitch303's Avatar
    Join Date
    Jan 03 2008
    AZ Member #
    23831
    Location
    Columbus, Ohio

    Re: Code P0012 How serious is this?

    You could bend a valve(s) I wouldn't drive it until it's fixed. Why on gods earth did Audi use a slave setup for the cams?

  3. #3
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Re: Code P0012 How serious is this?

    The purpose of the camshaft adjuster is to advance the intake valve opening during a cold start. This allows for the intake to scavenge more of the exhaust gasses and generate heat in the intake faster, thus reducing emissions. This is an integral part of the 1.8T meeting the ULEV standards. If the cam adjuster doesn't work properly the intake cam will not advance on a cold start and you will get a code P0012. After the car is up to temperature the intake cam returns to its normal operating offset. For a more detailed explanation read section 2.1.3Clicky click I would recommend just resetting the code and see if it comes back. As long as you are not hearing a lot of cam chain rattle your car should be OK to drive.

    Cheers!
    Last edited by old guy; 10-26-2010 at 03:40 PM.

  4. #4
    Established Member Two Rings BryMFL's Avatar
    Join Date
    Apr 20 2007
    AZ Member #
    17445
    My Garage
    '02 Audi 1.8T Quattro
    Location
    Winter Haven, FL

    Re: Code P0012 How serious is this?

    Thanks Old Guy, I believe I already have chain rattle or something. At idle some is rattling but it goes away after about 1000-1200rpm's. There don't seem to be any other problems with the car as of now. I have driven about 300 miles since the check light came on and nothing has changed except the rattle starting. What parts am I looking at having to replace and how bad is the job?
    "BryMFL"
    Bryan Meeks
    "Quattro- It's like having your very own roller coaster ride!"

  5. #5
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Re: Code P0012 How serious is this?

    Here is a DIY for replacing the cam chain tensioner. It is for a Passat but the procedure is essentially the same.Clicky click. Here is another one. Clicky click Unfortunately the part is rather expensive. Clicky click

  6. #6
    Established Member Two Rings BryMFL's Avatar
    Join Date
    Apr 20 2007
    AZ Member #
    17445
    My Garage
    '02 Audi 1.8T Quattro
    Location
    Winter Haven, FL

    Re: Code P0012 How serious is this?

    So hands down this is the only thing possible for it to be? Could I have a bent valve? While I'm in there for this job is there anything else I should do as a preventative maintenance thing?
    "BryMFL"
    Bryan Meeks
    "Quattro- It's like having your very own roller coaster ride!"

  7. #7
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Re: Code P0012 How serious is this?

    Quote Originally Posted by BryMFL View Post
    So hands down this is the only thing possible for it to be? Could I have a bent valve? While I'm in there for this job is there anything else I should do as a preventative maintenance thing?
    I doubt you have a bent valve if your motor appears to be running OK. What you are describing (rattling accompanied with the P0012) is a pretty strong indication of a problem with the cam adjuster. While you are in there you obviously will replace the front and rear cam seals along with the valve cover gasket. That is really about it.

    Good luck!

  8. #8
    Established Member Two Rings BryMFL's Avatar
    Join Date
    Apr 20 2007
    AZ Member #
    17445
    My Garage
    '02 Audi 1.8T Quattro
    Location
    Winter Haven, FL

    Re: Code P0012 How serious is this?

    Got it done today. Pretty simple install took me about 5 hours (Yes I know I'm slow). Have to wait till tomorrow to run it, but it started fine. I'll give an update after tomorrow....well on second thought I have to drive 1200 miles over the next 5 days so I'll do it afterward.
    "BryMFL"
    Bryan Meeks
    "Quattro- It's like having your very own roller coaster ride!"

  9. #9
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Re: Code P0012 How serious is this?

    Quote Originally Posted by BryMFL View Post
    Got it done today. Pretty simple install took me about 5 hours (Yes I know I'm slow). Have to wait till tomorrow to run it, but it started fine. I'll give an update after tomorrow....well on second thought I have to drive 1200 miles over the next 5 days so I'll do it afterward.
    Nice job! You just saved yourself hundreds of $$$!!

  10. #10
    Senior Member Three Rings Hotel Guy's Avatar
    Join Date
    Oct 07 2007
    AZ Member #
    21619
    Location
    Chicago

    Re: Code P0012 How serious is this?

    So whats the official outcome? I believe I have this same issue (tin-like rattle from 2k-3k rpms) and was told that its most likely the Cam Chain Tensioner. I was also told that this would be approximately $1,900 to fix at a local european service store. Anyone have any input?

    What was your total cost for the DIY? Difficulty on a scale of 1-10?

  11. #11
    Veteran Member Three Rings
    Join Date
    May 23 2008
    AZ Member #
    29120
    Location
    Denver

    Re: Code P0012 How serious is this?

    Hell yea Hotel Guy.... I'm a Spartan Alum


    (sorry for the thread jacking)

  12. #12
    Established Member Two Rings BryMFL's Avatar
    Join Date
    Apr 20 2007
    AZ Member #
    17445
    My Garage
    '02 Audi 1.8T Quattro
    Location
    Winter Haven, FL

    Re: Code P0012 How serious is this?

    Quote Originally Posted by Hotel Guy View Post
    So whats the official outcome? I believe I have this same issue (tin-like rattle from 2k-3k rpms) and was told that its most likely the Cam Chain Tensioner. I was also told that this would be approximately $1,900 to fix at a local european service store. Anyone have any input?

    What was your total cost for the DIY? Difficulty on a scale of 1-10?
    My cost was about $550 in parts and the difficulty level was probably about an 5 or 6. I found a website that carried the chain tensioner for $350 after buying it for $460 http://www.mjmautohaus.com/catalog/p...oducts_id=2180
    "BryMFL"
    Bryan Meeks
    "Quattro- It's like having your very own roller coaster ride!"

  13. #13
    Registered Member One Ring
    Join Date
    Mar 28 2007
    AZ Member #
    16807
    Location
    Arlington, WA

    After changing the Chain Tencioner

    I have recently changed my chain tencioner and right after I did it the noice went away. However, i keep on getting the code p0012. I reset it but it came back on again after making a 10 mile trip. What can it be? Where should I try to troubleshoot?

  14. #14
    Senior Member Two Rings
    Join Date
    Jun 27 2010
    AZ Member #
    60750
    Location
    US

    Quote Originally Posted by fitch303 View Post
    You could bend a valve(s) I wouldn't drive it until it's fixed. Why on gods earth did Audi use a slave setup for the cams?
    You could NOT bend a valve. The range of adjustment on a cam adjuster (even a failed one) does not reach that point at either end of it's travel...it makes advances and retards of the intake cam in relation to the exhaust cam well within mechanical limits of piston clears....not the effect of T-belt breaking.
    Last edited by silverd2; 10-26-2010 at 03:26 PM.

  15. #15
    Senior Member Two Rings
    Join Date
    Jun 27 2010
    AZ Member #
    60750
    Location
    US

    Quote Originally Posted by old guy View Post
    The purpose of the camshaft adjuster is to advance the intake valve opening during a cold start. This allows for the intake to scavenge more of the exhaust gasses and generate heat in the intake faster, thus reducing emissions. This is an integral part of the 1.8T meeting the ULEV standards. If the cam adjuster doesn't work properly the intake cam will not advance on a cold start and you will get a code P0012. After the car is up to temperature the intake cam returns to its normal operating offset. For a more detailed explanation read section 2.1.3 (Clicky click). I would recommend just resetting the code and see if it comes back. As long as you are not hearing a lot of cam chain rattle your car should be OK to drive.

    Cheers!
    Very odd system, cosidering Audi V6 and V8 engines with VVT start locked in the most retarded cam position, until more oil pressure is built up...then only advances slightly. Max advance is used under heavy torque at the higher rpms, to help maintain max torque curve...much like ignition timing advances as rpms go up, all the way back to early vacuum advance point ignition distibutors, which started the car at maximum spark retard position (they would not even start if timing was a little to advanced).
    I can inder stand wht Audi had to fight rough running at such advanced settings on the 1.8T system.

  16. #16
    Veteran Member Four Rings old guy's Avatar
    Join Date
    Dec 28 2006
    AZ Member #
    14483
    My Garage
    '09 CC VR6 Sport
    Location
    Western Maryland

    Fixed the link( from the 2 year old post): Clicky click Read section 2.1.3.

    cheers!

  17. #17
    Established Member Two Rings
    Join Date
    Sep 15 2010
    AZ Member #
    64138
    Location
    massapequa ny
    Items for Sale

    Can you change the cam seals without any special tools? I know they came with timing belt kit but never changed them. If you definately need a tool do you know which one. Not for b6 but for a b5 1.8 aeb with 296k miles

  18. #18
    Veteran Member Four Rings diagnosticator's Avatar
    Join Date
    Aug 26 2005
    AZ Member #
    7741
    Location
    Seattle, WA

    The cam chain wears too. Should be changed at the same time as the VVT adjuster/tensioner.
    Vorsprung durch Technik

  19. #19
    Senior Member Three Rings tamaneri's Avatar
    Join Date
    Apr 02 2007
    AZ Member #
    16915
    Location
    New Jersey (Northern)

    i have a weird rattle, but the heck could i know if it's the cam chain tensioner?
    Taylor A. Maneri

    2003 A4 1.8TQ B6 Black/Black
    Unitronic Stage 2 | TT 386cc injectors | RAI test pipe | Magnaflow 16601 | Milltek downpipe | Forge 007 DV | rs4 rear sway | vent pod boost gauge | JHM short throw | 034 engine mounts | ARP snub | ECS RA4 stage 1 clutch/flywheel | Bilstein / H&R
    tamaneri (AIM)

  20. #20
    Active Member Two Rings
    Join Date
    Jun 19 2013
    AZ Member #
    117443
    My Garage
    supercharged nissan Xterra, Infiniti M45
    Location
    nashville

    I've this same code pop up on me but I do not hear any chain rattle. Are there any other possibilities?



Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


    © 2001-2014 Audizine, Audizine.com, and Driverzines.com
    Audizine is an independently owned and operated automotive enthusiast community and news website.
    Audi and the Audi logo(s) are copyright/trademark Audi AG. Audizine is not endorsed by or affiliated with Audi AG.