S3 8L camshaft fault P1340 &P0012 advice?

[Nathxn__]

I will try & keep this short, my Audi S3 has the following codes on permantly I have attached pics.
-Have checked the timing belt & the marks line up
-Camshaft sensor changed
-Previous owner says the cam chain is within tolerance (will check this myself though eventually)

The car idles perfectly & seems to run ok, if anyone has any advice or anything they would share I would be truly grateful.

Thanks

 

[Nathxn__]

Codes

 

[Nathxn__]

Codes

 

[<tuffty/>]

P1340 is normally cam belt... but given the other codes I would say potentially the cam chain is out... has it had head work done?

<tuffty/>

 

[Nathxn__]

Hi Tuffty, have seen your replies on various posts which have been very helpful.

I thought it might be a tooth out but all the marks appear to line up

When I changed the cam cover recently it looks as if work has been done to the cam chain so I assume something has. (I.e looks like it’s all been replaced)

I didn’t think to count the chain links at the time so I guess this should be my next move?

Thankyou for your time I appreciate it

 

[<tuffty/>]

I didn’t think to count the chain links at the time so I guess this should be my next move?

Yes...... cover off to confirm the exhaust cam is at TDC... its also possible that the cam belt pulley has sheared its key...

Confirm cam belt by setting physical TDC on cyl one using a long thin screwdriver or stick to see when on TDC... then check the timing marks are aligned at the bottom (damper pulley and cam belt cover mark) then check that the exhaust cam notch chain end aligns... this will confirm the belt is ok... then check cam to cam

<tuffty/>

 

[Nathxn__]

Thanks tuffty, gonna try that this weekend I’ll post if I have any luck

 

[AGB-S3]

P0012 , Mine was the crank position sensor output falling off at medium / high rpm .. due to old age ... ecu has to believe something , so it picks the crank position .. misses the odd pulse , then decides the cams are in the wrong place , has hysterics and sets the flag .. gets a good pulse train from the crank .. and runs normally ... after the new sensor , engine became quite civilized and even produced power at low rpm ...

 

[Nathxn__]

Hi tuffty, finally got around to checking the cam timing. The intake cam was slightly out on TDC, so moved it a notch by removing cam & slackening chain to correct it. Now counting 16 links all appeared good.

The car feels like it pulls a lot better than it did.. however I’m still getting the P0012 (over retarded) code( p1340 has gone) & a bit of a rough idle.

Do you have any more advice for me? Thankyou for your time.

 

[AGB-S3]

Rough Idle , mine dislikes having the air-con compressor running at idle , knock it off and its as smooth as can be
could be the position sensor , on its way out , local engine shop is able to exercise the cam position actuator, might be worth looking for locally ? checked mine , couldn't find anything wrong with it, that loss of low end torque sounds familiar ...

 

[Stuart B]

Now you Havre corrected the cam to cam chain have another look at the belt, they run fine a tooth out either way. Did it may just be fitted one too far forward.

 

[Nathxn__]

Hi AGB & Stuart, thanks for taking the time to reply, I’m pretty sure the cam belt marks line up when I checked, I’ve done my best but like AGB said I’m gonna get it checked properly..Got it booked in this week with a Specialist I know he’s going to check it with VAG-COM etc etc & go over it..I’ll post my results either way & once hopefully fixed it might help someone in the future .

 

[Ashy>>]

Hi I had this same code and traced it down to the cam sensor behind the cover on the side of the head.

Replaced sensor and code has not reappeared.

Just another option to look at .

Bam engine

 

[Nathxn__]

Hi thanks for the reply Ashy, have changed camshaft sensor and still no luck.
Have done the full tensioner & chain kit, new cambelt kit also and confident its timed up cam to cam & belt are bang on, checked & checked.

I’ve eliminated p1340 but still have p0012
The only difference being it says ‘intermittent’ and takes a few miles to come on.

Any one think it could be oil related? Thinking of changing the oil pump (already done the pick up)
Thanks in advance to anyone who has the time to reply.

 

[AGB-S3]

I wondered if there is a filter or something in the oil supply to the actuator , ive put another 1000 + miles on the car , since the last p0012 event , nothing happen yet .. but after a session of, 'wavering power delivery' early on, which has now mysteriously cleared , the car is running well , with notably better torque at low rpm ...

one may be linked to the other

position sensor , if the cam is not in the right place, then the power will be wrong , but is the cam simply full advance and fully retarded ..or it a proportional servo , that adjusts the position ...?

>>> probably a harness fault , the cosworth 24valve [5 volt] harness crimped connector pins , had a habit of going slightly high resistance** and causing various faults , needed a few amps to find them , battery and bulb , meter just showed 0 ohms , the bulb dimmed .... quick solder and fine ..again

** crimps that pass amps never fail , those in very low amps or voltage sense lines , corrode over time

G,

 

[AGB-S3]

And after over 1000 miles, may be near 2000 of happy motoring , on the way to work , tuesday , back comes the poo12 flag , no discernible event , before or after , no other faults in the ecu , cancel the flag , nothing ... back to normal

Only this time , there may be a correlation , with a particular exciting drive back from work, the previous day , that may of been the prelim to the last event , still a mystery , previously the local engine shop , could find no fault , [ other than the crank sensor - now replace ]