Yellow oil light

[Louis Scott]

2.0 tdi brd pd170 yellow oil light has been coming on now for a while, oil is full every time. Today i took the cap off and the light went off which says to me pressure but the cap didnt blow out my hand or come off with force. Originally i thought it was a dodgy sensor before removing the cap. Could i have air in the system? Might be wrong but im sure this problem came up after a service , with oil change etc. No blue smoke and isnt running rough at all. No oil & coolant mix.

 

[Pie-eyedpiper]

Have you changed the sensor?
Have you touched your vacuum pipes at all?

 

[Louis Scott]

only vac lines fir egr but blanked them

 

[Pie-eyedpiper]

Did you disturb the non return valve on top of the rocker cover?

 

[Louis Scott]

Is that the breather to the cold inlet? Thats been removed a few times

 

[mm707]

Sensor in the sump, cheap and easy to change when you change the oil. Opening the bonnet resets it. Mine used to come on about every 150 miles.