why would this happen for

9th April 2011, 12:54

Hi i have a citroen c2 i no its not a saxo lol but general error and be honest some of c2 forums aint got a clue lol when i start up car i get error message saying low oil pressure and as soon as i rev it over 2k it goes off and then its fine even when its idling untill i turn off engine and leave car a short while and start it back up i get same eroor and rev it and goes off again this has just started doing this and it had a service 5 months ago oil level is ok just wondering if anyone could shed some light on it does any one think replacing the oil filter could help ???

9th April 2011, 13:08

In a high mileage engine, low oil pressure is often due to a combination of worn main and rod bearings and crankshaft journals. The oil pump itself does not create pressure. It produces flow and the resistance to that flow produces pressure. Resistance is created by the orifices in the engine block through which the oil flows, and the amount of clearance between the bearings and crankshaft journals. As the bearings wear, clearances increase allowing increased flow which reduces pressure.
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9th April 2011, 13:12

my car is only on 40,000 miles i dont think it will be due to this.

also im getting no diffrence in engine noise still sounds smooth as new

9th April 2011, 13:29

could be a dodgy sensor

9th April 2011, 14:05

aye ive read eitha switch dodgy or needs tightening or common ault on c2s are the paper oil filters some times collapse lol so £5 to change that so will try that like

9th April 2011, 15:59

^^+1 , C2s are very prone to filters collapsing internally, use a Genuine or Mann filter, failing that i'd try a sensor before delving any further