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[typhoo]

Any ideas on my current issue please? Did a short 3 mile journey, temp gauge didn't move as it usually reaches normal quite quick. went to pull over to park and the engine died, ignition lights on and engine management light on, tried to start again and nothing, plenty of battery power. Called recovery out and as ever, tried to start and away it went. Left it running for 5 mins and it died again. It showed fault, Post Cat sensor-temp. P0430 got recovered home thankfully. The car will start easily when cold but only runs until it gets quite warm, the temp gauge hardly moves. Any thoughts would be appreciated thanks.

[YZ250]

Starting from cold and then cutting out when warm is classic crank sensor symptoms, not always but most of the time. Assuming it's a V6, P0420/P0430 are common codes for showing an emission fault but in this case most people ignore this code or have the sensors relocated. I wouldn't dwell on that one too much as it may have already been stored.
Crank sensor unfortunately doesn't always show a code.

[BazaJT]

+1 for crank sensor,my V6 did exactly same thing.Start fine from cold run a while and die,wouldn't restart straight away but leave it a while and off it'd go again only to die a short time later.New crank sensor sorted it.Do buy genuine GM from a genuine GM dealership though.

[TheBoy]

If you have a P0430 code, it must be a 2.6 or 3.2, thus my initial reaction is crank sensor as well

[typhoo]

Thanks for the info. Would the crank sensor prevent the temp. gauge from reading also?

[ffcgary1]

Temp gauge is controlled by a small brass sensor screwed into the coolant bridge at the rear of the valley between cylinder heads, the wire is terminated with a female spade connector and can just fall off, if you remove the upper plenum access is gained to the rear of the valley and you will see the sensor,
if the single wire is attached then you need to ground the wire to anything metal preferably the body and see if the gauge goes up to the hot, if it does then the sensor is goosed.

[typhoo]

Thanks again, will have a look at that tomorrow.

[typhoo]

Excuse total ignorance but where is the crank sensor located on the 3.2 V6?

[Diamond Black Geezer]

Next to the oil filter 

Google what you're looking for and it should present itself fairly easy. It's got ribbed alloy heat shielding on the wire. 

[typhoo]

Thanks for the rapid reply, much appreciated.

[Diamond Black Geezer]

Ah, you're welcome, it's what they pay us for.... oh, hang on!   



...thing is, you start as a newbie asking questions and in ignorance... but you learn and (provided your Omega last long enough) eventually you become someone who is answering questions, too. It's not all about cars, cars, cars, of course, there's general chat, where football, Merkel, and what shed should I buy are brought up on a weekly basis 

[typhoo]

Love this group, so helpful, thanks.

[Diamond Black Geezer]

Where abouts in Lincolnshire are you, by the way?

[typhoo]

I'm close to Spilsby, about 10 miles inland from sunny Skegness

[Diamond Black Geezer]

Ahh, 30 mile from us, then in Cleethorpes, theres another not far from Lincoln, and another chap up in Scunny.  Good stuff