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[michael whenman]

i have a gm fault code reader for a vauxhall omega  t[he type that goes on 2 pins] . when it is on it flashes 10 x then another 5 x .
  does anyone have a clue what this means as the booklet you get with it doesnt explain  it  properly

[Jay w]

the system is trying to give you the code, the flashes correspond to the numbers...

so 10 pause 5 would be code 0105? have a look at this site and it will tell you what that code means

http://www.topbuzz.co.uk/info/fault_codes/fault_codes.htm

scroll down the page and have a look at the codes

0105 sounds like Intake manifold pressure sensor.

What age  and engine size is your car? i would hazard a guess it is a facelifed 2000 on car as this looks like a 'simtec' code (later type of injection system)

[TheBoy]

see Maintenence Guides section for a post titled Paperclip test (your reader is simply a fancy paperclip)

[michael whenman]

its a20ltr 1999

[michael whenman]

rang vauxhall ask them about intake manifold pressure sensor they told me its an airflow meter is this right

[Jay w]

not as far as i am aware.......

what's the fault with the car?

as The boy said your item is a paperclip reader

that said i believe i may have misread your flashes, 10 flash then 5 flash could be 0115, if thats the case then it will be Intake Coolant Temperature Sensor, this is a temp sensor that sits in the air feed tube that comes out of the airfilter box....

what are is the fault/issue though with the car?

[michael whenman]

when warm rev drop sometimes cuts out cleaned all breathers changed idle control valve and the fault code reads 10 flashes then 5 flashes vauxhall said the intake pressure sensor is the black thing that sits on top off the airflow meter