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

Posted By trucknut Saturday, April 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 Saturday, April 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 Saturday, April 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 Saturday, April 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 Sunday, April 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 Sunday, April 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

Sunday, April 23, 2006 5:45:42 PM by J Warden
trucknut
 Posted Sunday, April 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 Sunday, April 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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