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vauxhall vectra,high voltage at mass-air-flow sensor & air intake temp sensor

Posted By trucknut 4/22/2006 9:56:46 AM
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vauxhall vectra,high voltage at mass-air-flow sensor & air intake temp...

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trucknut
 Posted 4/22/2006 9:56:46 AM
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Has anyone come across this problem before,the engine management light is on permantly,snap-on modus states the voltage to the mass air flow meter and also the air intake temp sensor is to high which i have confirmed with a volt meter,voltage at the mutiplug should read between 0.5 volts and 3.0 volts depending on atmosphere temp,but i have got just over 9 volts.have tried new air sensor but no different,the emissions on the engine are all to cock but i am hoping once this fault is sorted the emissions will come good,so if anybody has had a similar problem please let me know.
Vehicle details 2000/1.8 16valve/x18xe1 engine/
scartboy
 Posted 4/22/2006 11:15:57 AM
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Have a look through this old topic.

http://www.bba-reman.com/forums/Topic2599-1-1.aspx


There are similarities with your case.

Gerard
Angus
 Posted 4/22/2006 8:00:09 PM
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trucknut

Welcome to the forum.

Since that previous post, I've now come across this several times on engine-mounted GM ECU's and it's always been the MAF/IAT sensor's earth pin coming loose in the ECU's circuit board. 

There have been posts on here and elsewhere, that say it's possible to just earth the dual sensor's yellow[?] wire and that sorts it.  A repaired ECU is definitely preferable, but if funds are lacking......

.

sparker
 Posted 4/23/2006 5:05:13 PM
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hi

have you cleaned out the throttle body ?these vectras behave odly when the body is clogged

                sparker

J Warden
 Posted 4/23/2006 5:43:08 PM
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Try putting the yellow wire of the mass air from metre direct to earth and the clear the codes, It has worked for me in the past,

John

4/23/2006 5:45:42 PM by J Warden
trucknut
 Posted 4/30/2006 6:01:25 AM
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Thank you J Warden for this valuable piece of information,tried the suggested fix Sunday 30/04/06 Worked a treat,one happy nephew,one happy uncle(me) Thanks again trucknutSmile
rudi
 Posted 4/30/2006 1:17:33 PM
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Well done and thank you Angus for the valuable support to this forum. I am sure Trucknut will be very appreciative.

rudi

www.the-good-garage.com

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