Could be also it needs an engine flush, but if it was the pump it would struggle more at high revs than low and your light would be on full or flashing constant as the pressure would be low, could be wrong, but try the switch 1st and next time you change the oil get them to do an engine flush, I do my own you just add it to the engine with the old oil in then drain, costs approx $10 a bottle, makes a big difference.
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Last edited by marti5; 12-10-2008 at 12:34 PM.