Greebo

Update; Decided to change the injector seals again (myself this time, not too difficult) AND changed water temp sender at same time. This seems to have cured the problem. The temp sender on this 115 PD AUY is 2pin and would seem to drive both the dash gauge and the ECU. Very strangely though I shorted the pins in an attempt to deflect the gauge but this had no effect yet now the new sender has been fitted the temp gauge works perfectly!!

Thankyou SB So you think the two wires feed both ecu & gauge...... Even if I short the two wires the gauge does not move so presumably the ECU is also getting no temp value. Do you think this would cause constant overfuelling- enough to raise the oil level over three weeks?

The PATS chip certainly can cause problems for such a tiny piece of plastic. The slightest dirt on CPS will stop it starting and is easy to clean very quickly.

1.9 diesel with unit injectors has rising oil level- must be diesel I had similar prob 2 years ago and changed tandem pump and had injector seals renewed, which cured it. Recently the water tempeature gauge which was intermittent (sender was renewed) has now failed completely so I am wondering if this also feeds the ECU for over-fueling when engine cold? This temp sender, below tandem pump, however has two wires only (2000.75 on TIS) brown=earth blue=5volts so I wonder if this only feeds ECU and the gauge is fed from a second sender and therfore the failure of the gauge probably doesn't matter? Do you think overfuelling is likely to raise oil level 6mm in three weeks?