Lumpy idle (Throttle body gasket)...

[IntriguedUser]

Would not having a throttle body gasket cause the car to misfire/not start + lumpy idle + throw up three different fault codes relating to the throttle body?

I broke it when I was cleaning it, I decided to spray some carb cleaner around where the gasket should be and the revs go up quite sharply. I've ordered one for £1.95 from ebay, so I'm quite confident this should solve my issue.

I'm pretty suprised that having no gasket can cause such issues, especially through such a small hole which screwed down pretty tight.

Is there a fault code reader I can buy to clear the fault codes myself rather than spending £20 to get a mechanic to do it.

[hardcorehobbit]

Yes it would... considering air isn't meant to get in or out there.

You can clear fault codes with the Torque Pro App on android or iOS and a bluetooth OBD2 dongle.

[CrutyRammers]

Oh yes.
ECU assumes that the air getting in is controlled by the throttle. If you introduce a leak then that assumption is no longer correct and it'll be misfueling, hence the lumpy idle.
Silicone sealant will fix it if you can't get hold of a gasket/need a quick fix.