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Old 23-07-2014   #1
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Throttle Position Sensor - Replacing

My daughter's 1.2 Lounge has gone into 'limp' mode. OBDII has given me an error code of P1220 - TPS Potentiometer fault.


It would appear to make sense to replace the TPS first before I delve deeper. My question is how difficult is it to replace? I understand that it is attached to the accelerator pedal and is only secured by two hex screws with the electrical connection above. My problem is I can't get in there to see what needs to be removed from, what appears to be, a 'cage'.


Has anyone else changed the TPS on a 500 and, if so, any chance of a piccie or two or some advice ref how to get to it?


Many thanks,
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Old 26-07-2014   #2
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Re: Throttle Position Sensor - Replacing

TPS is the sensor on the throttle body.
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Old 26-07-2014   #3
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Re: Throttle Position Sensor - Replacing

That's what I thought but wasn't confident enough to say.
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Old 26-07-2014   #4
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Re: Throttle Position Sensor - Replacing

lol......we all get things wrong, so what

To OP, may I suggest some proper diagnosis and not just what the code reader says, I have found wiring faults on his circuit in different places.
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Old 15-06-2016   #5
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Re: Throttle Position Sensor - Replacing

Evening all!

My wife has had this issue today with her 13 plate 1.2 Colour Therapy.

She was driving along when the car went into limp mode, but thankfully was in a village on a main road so easy to pull in.

I wasn't there at the time, but the code returned was "P1220 - throttle sensor malfunction". Apparently the AA chap then cleaned it out a bit, popped it back in, reset the codes and the car was able to be driven back home.

My wife was just about to go out again and the MIL light came back on again; she was barely able to get it off the drive, so quickly reversed back home!

The car is due to be booked in to our local garage tomorrow morning, but was wondering if there are any suggestions in the meantime, if only to make it more driveable to get it to the garage (which is about half a mile away)? I have a feeling there was a thread somewhere (possibly on the GP section) where @Andy Monty replied about resetting the battery and doing a throttle relearn?

Other than that, any other suggestions?

Many thanks in advance!
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Old 16-06-2016   #6
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Re: Throttle Position Sensor - Replacing

Just managed to get my MultiECUScan to connect and I'm getting the same error, so would be interested to hear what happened with yours in the garage today.
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Old 16-06-2016   #7
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Re: Throttle Position Sensor - Replacing

Just been googling this again and it seems its a difficult part to source other than from Fiat dealer.

I did find one place but it wouldn't ship until Monday. I'm going to attempt to clean it. I have some MAF sensor cleaner from my Ford Cmax so I'm wondering if that might do the job. It's intermittenent so could just be crud in the system. Bearing in mind this car was standing for about 8 months in a muddy alley, who knows.

Shame I've wasted my money ordering a new battery and coil pack, ho hum.
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Old 16-06-2016   #8
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Re: Throttle Position Sensor - Replacing

So this is the throttle body. I unplugged it, gave it a bit of a squirt with compressed air. Sprayed some MAF cleaner into the throttle body, started it up, gave it a bit of revs and the fault came back.

So, I'm going to need to get a new sensor then. Does anyone know, do I have to remove the whole throttle body to replace the sensor. I can't see any screws to remove it. Haynes manual doesn't say!
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Old 16-06-2016   #9
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Quote Originally Posted by typecastboy View Post
So this is the throttle body. I unplugged it, gave it a bit of a squirt with compressed air. Sprayed some MAF cleaner into the throttle body, started it up, gave it a bit of revs and the fault came back.

So, I'm going to need to get a new sensor then. Does anyone know, do I have to remove the whole throttle body to replace the sensor. I can't see any screws to remove it. Haynes manual doesn't say!
Have you checked eLearn? Diagrams aren't always the best but it might give you some idea.
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Old 16-06-2016   #10
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Re: Throttle Position Sensor - Replacing

I'd take the whole body off first, it's only 4 screws. Sometimes it can be easier to disassemble than struggle in a tight space. Don't know how the TPS comes off the body. At least with the body off you can see it properly.

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Last edited by g8rpi; 16-06-2016 at 15:27.
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Old 16-06-2016   #11
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Re: Throttle Position Sensor - Replacing

Quote Originally Posted by Pathaleon View Post
Have you checked eLearn? Diagrams aren't always the best but it might give you some idea.

I haven't actually I will look. I've bought a 2013 complete throttle body from eBay for 25 assuming I have to take the whole thing out to change the sensor I might just change the whole thing. Have since found out that you can use brake cleaner to clean out the intake.
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Old 16-06-2016   #12
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Re: Throttle Position Sensor - Replacing

I've now taken the whole throttle body off as I tried cleaning it and it made no difference. The TPS I've seen in pictures doesn't actually look anything like what I'm looking at.

This is the part I've taken off of the side of the throttle body which has a circuit board in it. Is this the sensor?

I believe that this isn't anything to do with the sensor, I now think that the sensor is actually screwed onto the pedal so I've probably taken this all off for nothing and bought a second hand one for nothing. Oh well, we live and learn.
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Last edited by typecastboy; 16-06-2016 at 17:27.
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Old 16-06-2016   #13
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Re: Throttle Position Sensor - Replacing

Quote Originally Posted by typecastboy View Post
I've now taken the whole throttle body off as I tried cleaning it and it made no difference. The TPS I've seen in pictures doesn't actually look anything like what I'm looking at.

This is the part I've taken off of the side of the throttle body which has a circuit board in it. Is this the sensor?

I believe that this isn't anything to do with the sensor, I now think that the sensor is actually screwed onto the pedal so I've probably taken this all off for nothing and bought a second hand one for nothing. Oh well, we live and learn.
In a typical fly by wire system there is normally potentiometers on both ends to determine pedal position and throttle position respectively.
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Old 16-06-2016   #14
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Re: Throttle Position Sensor - Replacing

Doesn't seem to be anything engine end. I've had a look at pedal it seems it's only 3 bolts to undo to remove so I'll have to do that tomorrow make sure I've got the right bit this time and order one
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Old 16-06-2016   #15
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Re: Throttle Position Sensor - Replacing

In the pic you can see the sweep area that's on the reverse of the board that's the potentiometer I would guess the actuator is the other side of the assembly?
You also have is it, throttle 'pedal ' position sensor or throttle valve/body/flap position sensor?
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Last edited by John202020; 16-06-2016 at 21:58.
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