Air intake temp. sensor

comet

The eml is on and opcom tells me that the air intake temp sensor is showing a fault. On the block readings it's showing 5v and -40C. So I guess it's stuffed.

The question is - the car seems to run fine with it busted so is there any point replacing it?

(If I clear the code using opcom it doesn't run well, until the eml comes on again in which case I guess the ecu is ignoring the air intake sensor as it then runs fine. notsure.gif )

vocky

get a secondhand sensor from ebay :thumbup:

MikeS

when the eml light comes on it basically means the sensor is inoperable and ecu uses a default value hence -40

before it uses a default value it could be saying anything extreme

comet

Thanks guys.

None on ebay atm. I'll keep looking.

It was showing -40 whilst the eml wasn't on so I guess that's the extreme. Surely they wouldn't set -40 as the default setting?

Which explains why it ran a bit odd before the eml came on and the sensor was deemed to be inoperative.

Now I know it's operating on a defualt setting I'll just leave it until one comes up somewhere.

comet

I got a (used) replacement from a guy on VVOC. Fitted it and it's the same - on opcom it reads 5v and -40C.

So either the replacement is a dud or there's a problem elsewhere.

D'oh. I just got physical with the wiring and it's snapped off at the plug. Looks like that's the problem.

Update - I've rewired the plug and it's fine now. The reading of 5v threw me because I assumed that showed power was getting to the sensor. Now it's fixed the voltage reading fluctates, but at first start up (ie fast idle) it's around 1.75v, and the temperature reading is just above ambient. 😃

SydenyZaf

comet said:
I got a (used) replacement from a guy on VVOC. Fitted it and it's the same - on opcom it reads 5v and -40C.

So either the replacement is a dud or there's a problem elsewhere.

D'oh. I just got physical with the wiring and it's snapped off at the plug. Looks like that's the problem.

Update - I've rewired the plug and it's fine now. The reading of 5v threw me because I assumed that showed power was getting to the sensor. Now it's fixed the voltage reading fluctates, but at first start up (ie fast idle) it's around 1.75v, and the temperature reading is just above ambient. 😃

So how did your re-wire the plug - I have the same problem.

Matt

i had the same problem too! the wiring that goes into the plug wears and breaks. what i done was take the wiring seal out of the plug and solder to pieces of wire to the terminals in the plug then soldered them to the wiring on the car. Some heatshrink and fill the plug around the wires with silicone to stop water getting in there and bobs ya uncle!!

MikeS

default value is -40c, as car warms up then you will notice problems with fuelling