Hey guys don't know if you can help but my car is having troubles again she won't fire up at all I have done a code check and it has come up with 55 when I turn the key just to the on position and you can hear a buzz in the engine bay just wanted to know if anyone knew what it was.

Please can anyone help at all

code 55 is all clear far as i know !

 

can you determine which area of the engine bay its coming from ?

All I can tell you is that it is at the very back near the knock sensor connection the buzzing does have something to do with the cas unit though as I disconnects the cas and it buzzed for a split second and that was it then plugged it back in and it was continues again.

The buzzing could be a stuck idle control valve. Try starting the engine with a bit of throttle

Code 55 is all clear matey. id go with niggles suggestion first.

The buzzing could be a stuck idle control valve. Try starting the engine with a bit of throttle

 

Agreed, a bit of throttle might have the effect of clearing its throat !! :mellow:

I have tried applying the throttle still nothing I think it could be my cas unit if I can get it running the first thing I will have to do is take it to zed world for them to have a look

cas is at the front though :confused1:

 

Try putting a screwdriver to your ear and on the cas and it might help pinpoint the sound?

:lol::lol:

is it an auto if it is check the TPS voltage a friend had his buzzing at the rear of the engine was the TPS out re-adjusted and all ok after hope this helps

I maybe stupid but what is a tps and where is it

The tps (Throttle Position Sensor) is on the passenger side throttle body. It's a little black box.

HTH

ahhh now i know what your on about lol yeah i will check it tomorrow when i have time and see if i can re-adjust it slightly to see if that helps cheers for all the help :)

bump, i have this noise when i apply throttle with the engine off. adjusted the tps to 0.45 v on closed idle. still doing it,

 

throttle off = silence

partial throttle= buzzing at back of engine....

are there any switches on the throttle pedal?

 

have you tried moving the harness at the back of the engine?

 

have you checked all the connectors for corrosion and good connection?

 

and the little fuse box to make sure they are all good (particularly the fuel pump one)

i am moving the throttle by hand at the throttle bodies, so that would illiminate the pedal.

 

i will have a look at the other stuff thanks

 

anybody else able to shed some light