Technical P1120 WRONG THROTTLE BODY POSITION

[Fiat 500 p1120 help]

Hi, iam a fiat 500 twinair 2013 automatic 165k km, owner and i have trouble with this error for months. While driving check engine lights are on and the car goes on limb mode. I have changed 2 used throttle bodies, change the petal, repair the ecu unit (as they told me) and check the wiring. Also disconnect air condition, just in case that was the problem, but nothing. The problem is still there. Also been in 3 different repairs shops and all of them checked the same things. Please help me, has anyone had the same problem and found a solution?
Thank you.

 

[jrkitching]

At that age and mileage, it could be an excessively worn uniair module.

Unfortunately a faulty uniair module is both hard to diagnose and expensive to repair.

There are plenty of other threads about this issue.

Have a look at this post.

 

[koalar]

ECU is seeing a mismatch of information, from the throttle body sensors, it's not within the range it's expected to see

Did you recalibrate / relearn the throttle bodies after fitting, this can only be done electronically

Leaving the battery off and some special start sequence, will do nothing, although it will sometimes self adjust if the two throttles are close in specifications

Were the part numbers the same


5V reference and chassis ground are an obvious start

The the diagnostic procedure below

 

[Fiat 500 p1120 help]

At that age and mileage, it could be an excessively worn uniair module.

Unfortunately a faulty uniair module is both hard to diagnose and expensive to repair.

There are plenty of other threads about this issue.

Have a look at this post.

Thanks, i have already changed the uniair module at about 120k, you think its that again? I have read all the others threads, but i haven't found a solution.

 

[Fiat 500 p1120 help]

ECU is seeing a mismatch of information, from the throttle body sensors, it's not within the range it's expected to see

Did you recalibrate / relearn the throttle bodies after fitting, this can only be done electronically

Leaving the battery off and some special start sequence, will do nothing, although it will sometimes self adjust if the two throttles are close in specifications

Were the part numbers the same


5V reference and chassis ground are an obvious start

The the diagnostic procedure below


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Thanks, yes they recalibrate the throttle bodies, i think they are doing this every time after they delete the message. I don't know if they have done the diagnostic procedure you said, i will inform the repair shop.

 

[jrkitching]

Thanks, i have already changed the uniair module at about 120k, you think its that again?

No, I think that can be ruled out if that's the case (assuming that you fit a new part, and not a secondhand one).