One for Wammers

Help please Wammers
My coolant sensor is showing -23 C so am I better of taking connector off or leaving it on I have to drive 120 miles home have new sensor at home

sandyt said:

Help please Wammers
My coolant sensor is showing -23 C so am I better of taking connector off or leaving it on I have to drive 120 miles home have new sensor at home

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Which sensor ECU?

Yes ECU

sandyt said:

Yes ECU

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You can try it and see how or if engine runs. Not sure about V8 but there should be a default it reverts to if sensor goes down. At -23 the fueling will be a tad on the rich side.

Yep ever so slightly I have a hangover afraid so not thinking straight I will start her up and disconnect the sensor whilst in live data and see what happens ta for reply

sandyt said:

Yep ever so slightly I have a hangover afraid so not thinking straight I will start her up and disconnect the sensor whilst in live data and see what happens ta for reply

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Just had a read and yes it does have a backup value preset. So should be ok to disconnect.

Just ran her and disconnected and runs better Interestingly when disconnected the reading went to -40c then went blank??will do more indepth diag when home
Thanks again for your help

Got home ok and fitted new temp sensor this morning lambdas are now giving good results the maf is also spot on had it not been a post you put up a long time ago that I stumbled on whilst searching I would have wasted a load of time thanks again Wammers

sandyt said:

Got home ok and fitted new temp sensor this morning lambdas are now giving good results the maf is also spot on had it not been a post you put up a long time ago that I stumbled on whilst searching I would have wasted a load of time thanks again Wammers

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No problem that's what it is all about.

sandyt said:

Just ran her and disconnected and runs better Interestingly when disconnected the reading went to -40c then went blank??will do more indepth diag when home
Thanks again for your help

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The faulty sensor must still be giving a reading that's considered to be within range, when you disconnected it the ECU knows for sure there's a fault and goes to the default. Having been to Poland a few times in the winter -23C is a very realistic possibility!

Replaced the sensor when I took old one out it just span so had to nibble the plastic of it was full of white oxidation crud no wonder it was confused see what that white powder does to footballers