75ZT Community

[Mick]

Came on at start up this morning. Can anybody tell me what to check first please?
The car runs perfectly normally, nearly a hundred miles all together today.

Thanks.

[Bernard]

Not really possible without a code reader.

[Duncan]

As Bernard suggest, it could be one of so many things. It might be as simple as a fuse to one of the sensors, but you could chase things all day without getting it read.

[Mick]

Thanks Bernard and Duncan, I presumed without some interrogation it would be a helluva trial and error job. I'll have a play with it as the car is behaving normally at the moment and arrange to get on a reader of some description after the weekend.
Thanks.

[Mick]

Checked under bonnet fuses, all intact, disconnected and reconnected electrical connectors situated between inlet manifold and battery box. Check engine fault indicator light disappeared. Must have been a dirty connection although they all looked clean and shiny.

[JohnDotCom]

Quite often you can just clear the fault light and it will run fine again before/if it lights up again.
That's what I have found on the Diesels anyway Mick.
Most code readers can clear this, if stuck Mick, I can post out mine to you.

On diesels the MAF can cause fault light you describe as well as fuel filter electrics connection on top.

[Mick]

Thanks John, I'll wait and see if comes back and take it from there, so far all OK.

[Duncan]

If it was a temporary fault, the light will go out after a few engine 'cycles' (starts) anyway. It may be co-incidence that you played with the connections, then again you might have fixed something with a dirty connection.

[Bolin]

I had the dreaded 'check engine' message flash up just briefly on my V6, literally for a couple of seconds when I revved it up to 4krpm immediately after starting it (from cold I think), it went away and never came back.

Car is not happy though.

I take it that there is no ay to work out what caused it without a code reader? Or will the fult have been erased as it hasn't come back?

[Duncan]

The fault should still be readable, at least by a T4 . I'm not sure if they are hidden from an OBD tester after a number of cycles without the fault.

[Mick]

Mine has still not returned after 20+ cycles, be interesting to plug it into T4 next time at nano if convenient. Thankfully the car is behaving itself as usual.