Technical 1.2 Petrol Check Engine Light

[lukey904]

very Intermittantly my girlfriends 2008 petrol 1.2 displays the check engine warning light. I have scanned the car for codes each time and the same code returns every time. P1220 accellerator pedal potent.( feasibility) is the code stored each time. As the fault is so intermittant it makes it nigh on impossible to trace the cause, as it would be very unlikely i would be able to make it fault again at the time of testing. I suspect the accellerator pedal itself to be at fault but would like some input if anyone else has had similar problems and what was replaced.
many thanks in advance

 

[lukey904]

Anyone had any similar problems ??

 

[306maxi]

Sadly not.

 

[Andy Monty]

P1220
Series Throttle Control System Malfunction


Now from a google a quick few common things flashed up from other makes relating to the Throttle body sensors / motors ......


eg

http://www.hotrodlane.cc/New LS Links Page/LS trouble codes/DTC P1220.htm


Now i might be talking out of my backside but if you have 10 mins to spare try this:


Remove the air box...

similar to this although you will need an alan key for the air intake hose on the 500



then do this:

https://www.fiatforum.com/stilo-guides/83260-cleaning-your-inlet-control-valve.html

then reset the eml

then do this

https://www.fiatforum.com/grande-punto/262685-1-2-wont-idle.html?p=2697299


Like i said it might not be it but costs nothing to try if its full of gunk also clean the breather hoses


Oh and welcome to the forum Lukey :wave:

 

[306maxi]

just be careful with the fitting on the back of the airbox, it snaps off easily.

 

[Andy Monty]

just be careful with the fitting on the back of the airbox, it snaps off easily.

which one the back rubber mount?

or the hoses?

 

[306maxi]

hose mount

 

[Andy Monty]

you rough begger :devil:

 

[306maxi]

Wasn't me I've had two airboxes under warranty

 

[dave]

are you/her keeping feet well away from Throttle when starting

 

[lukey904]

Her description of when it happens is pretty vague to say the least lol! As I previously said I suspect the pedal potentiometer to be at fault but thought I'd ask first to see if anyone had similar issues . With it being fairly intermittent it does make it difficult to pinpoint really. I think I'd be very lucky to actually see the potentiometer going out of tolerance on a multimeter and the fact the pedals don't appear to be ccommon to failure is somewhat worrying . Maybe as previously suggested checking the throttle ist physically sticking my be a good starting point without spending any money however id expect a throttle position fault ad opposed to pedal pos.?