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Vauxhall Corsa 1.2 A12XER 2010 - Codes P0016 & P0017 - Fixed #

Posted by Nick Favell on October 4, 2016, 3:55 pm

Year of Manufacture *: 2010
Engine Size and Code *: 1200 A12XER
( Optional) Fault Codes: P0016, P0017

Corsa came in with head gasket failed & EML on.
Head gasket now sorted, but keep getting P0016 & P0017 codes. This appears to relate to camshaft timing on the exhaust cam. Also lacking in power. But apparently it has always lacked power - the customer just thought that's how these were and the EML has been on for quite a while.
I have taken the covers off again & double checked the timing with the pin and bar set which all lines up good.
Swapped the sensors and actuators from the exhaust cams to the inlet cam and the code doesn't move.
I have scoped the crankshaft and camshaft sensors and the patterns look like good waveforms.
Trouble is I don't know how the patterns should line up with each other.
The cylinder head looks like it has been removed previously. Would a skim move the cam timing enough to create timing issues?
Can the sensor plate get knocked out of postion?
Can anybody let me have a crank/cams waveform?

Thanks in anticipation

Nick

Re: Corsa 1.2

Posted by Steve Harvey <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5250' width='330' height='300' border=0 style='border:none;'> on October 5, 2016, 7:51 am, in reply to "Corsa 1.2"

Hi Nick,
Did you use the tool to align the cam sensor reluctor?
Regards Steve Harvey

Re: Corsa 1.2

Posted by Nick Favell <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat3407' width='330' height='300' border=0 style='border:none;'> on October 5, 2016, 9:33 am, in reply to "Re: Corsa 1.2"
Nicholas Favell

I asked my tech this morning and he said yes.
Nevertheless I have slackened the gearwheels and physically double checked the cam timing and the reluctor wheels this morning. All spot on.
Cleared the codes, ran the engine up, fault codes came straight back.

Re: Corsa 1.2

Are the inlet and exhaust reluctor exactly the same? Could they have been swapped?
Regards Steve Harvey

Re: Corsa 1.2

Posted by Nick Favell <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=ukat3407' width='330' height='300' border=0 style='border:none;'> on October 10, 2016, 9:53 am, in reply to "Re: Corsa 1.2"
Nicholas Favell

All guess work at the moment.
I've managed to locate a car with the same engine fitted, that's arriving on Thursday.
So I can then do some definite scope comparisons and see where the fault lies (hopefully)
Will post my eventual fix

Nick

Fixed #

Posted by Nick Favell on November 28, 2016, 9:40 am, in reply to "Re: Corsa 1.2"
Edited by board administrator November 30, 2016, 11:40 am

Finally got to the bottom of this one. I thought I had posted a fix already but I was mistaken, so apologies for taking a while to post up the fix.

Scoping the poorly corsa and good corsa on crank & camshaft signal I could see a definite difference on the cam timing.
I double checked the tools fitted the same into both engines, but on the poorly engine the crank locking tool was nearly such a good fit.
By measuring the position of No 1 cylinder on the good engine I was able to determine that the camshaft locking tools fitted at TDC.
So it was then a matter of slackening off the camshaft sprocket bolts on the poorly engine, setting up to TDC using a DTI gauge and protractor, locking the camshafts in position and tightening everything up.
Clear codes, road test and bingo - job done.

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