Over winter the oil temp reading and oil pressure reading started to go intermittent between reading erroneously and correctly until they eventually just read as zero the whole time now. Anyone in the stoke on trent area have experience with this problem?

Fitted to 2003 jdm sti. Cheers

 

Is the warning light flashing? Just look up the manual off the defi website for the link meters it will tell you the fault

 

yes the light is flashing. in the manual this denotes loss of signal. however it is not specific to where or why there is a loss of signal.

 

Seems like a sender problem to me

 

First job is to check back along the wiring from the gauge to the sender. Look for chafing, loose or corroded connections etc.

If all is well, suspect the senders.

 

I had the very same problem on my old impreza. Turned out the sender had failed.