mk2 172cup still limping please help!

[172bruce]

hey peoples had a problem off and on with my 172 the code is p0120 that comes up and the toxic emmissions light comes on and then limps. so i replaced the accelerator pedel, coil pack and now fitted the revised crank case sensor. it worked for a feew days and is now back to its old tricks. i have a feeling it could be the throttle body because if im on the motorway its fine but will limp when i slow down to a stop or if i sit on idle for any more than a nano second

so i cleaned the body out and put it back but still no better could it be sticking at low revs? or am i barking up the wrong tree?

would go to a specialist but dont know anyone near me, im in bury st edmunds suffolk

cheers for ur help

bruce

 

[bigrich690]

I had the worst case of limp mode ever and in the end beleive it or not it was my engine mount that had worn that bad my engine must have been moving too much and causing the limp mode, i didnt even want to drive the car it was embarasing, changed the engine mount and the car drives better than the day i bought it 4yrs ago, even the stop and handbrake light doesnt come on anymore! (when driving)
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[MicKPM]

It needs to go to someone that knows what they're doing really... don't waste anymore cash guessing! There's plenty of reputable specialists on here that can and will be able to fix this for you.

Mick

 

[TrackdayAl]

The clue is in the title P0120 Throttle Position Sensor/Switch A Circuit Malfunction

http://www.ukdiagnosticdirectory.com/obd-codes.html

More than likely a bad connection than sensor issue.

Doesnt have to go to a specialist, a reputable independant like on here is a good start point.
http://www.boschcarservice.co.uk/