Help an old man ….

At three score and five + years , I’m not your typical 172 owner but I’ve owned my phase2 from when it was it three month old, enjoyed pretty much trouble free motoring and still love this little car. I grew up with and still run classics with carbs and points so “modern’ cars, including the 172 with all the sensors and electrics phase me a little.
For some time I have been experiencing random P0120 throttle position sensor limp mode faults. Some times weeks between occurrences and fixed by the off / on reboot.
Checked and cleaned the pedal and throttle connectors, next in line the dreaded white plug which looks like a b**ch to disconnect.
So, here comes the question … if I eventually go down the line of replacing the throttle body is it a simple plug and play job or does it involve any reprogram or coding ?

Throttle body replacement is plug and play. Its best off resetting the adaptives if you have access to dealer level diagnostics, but is not essential.

Brigsy, thank you for the prompt response, that makes it much simpler.
What are adaptives ?

Have you replaced the actual throttle position sensor?

Typhoon said:

Have you replaced the actual throttle position sensor?

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It's built into the throttle body

I had this.
Turned out it was corrosion on the fuses in the fuse box. Took each one out cleaned them up with some sand paper and put them back in.
The fault never returned

so far all I have done is inspect and clean the connectors on the pedal and throttle body. The fault is so random it difficult to assess what is going on.
I will attempt to disconnect and clean the white plug as my next step.

Typhoon … I was not aware that it is possible to replace the position sensor. I shall do some research.

Persiflage said:

Typhoon … I was not aware that it is possible to replace the position sensor. I shall do some research.

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I don’t think it’s as simple as that as it’s built into the throttle body like @Klumpy Dumpy says.

Not possible to replace the tps sensor on ph2, its part of the electronic throttle body.

Persiflage said:

so far all I have done is inspect and clean the connectors on the pedal and throttle body. The fault is so random it difficult to assess what is going on.
I will attempt to disconnect and clean the white plug as my next step.

Typhoon … I was not aware that it is possible to replace the position sensor. I shall do some research.

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My mistake mate. Wasn’t aware is was built in to the TB. Probably possible but more headache than it’s worth.