Question about 2003 Toyota Matrix

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Have a 03 matrix with a oilpump promblem I think,bought the car last week ran good next day was drive on highway notice oil lap on and noise from motor ,slowed down light went off.Next day change oil and fillter,ran the car for a couple hours ran good,shut it off turn it on,now light turn on without driving,next day took the car for a motor flush new oil and flilter again ran good for a few hour then light turn on.

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Generally three things can turn the light on. First is the sending unit itself if it's going bad. Next is an obstruction of the pump pickup screen (usually hard carbon deposits). Third is worn engine bearings (usually rod bearings). Best way to find the problem is to have someone put a mechanical pressure gauge on the engine and read the actual pressure. If it's low you need to go into the engine to determine why. if it's normal, replace the sending unit. Senders aren't terribly expensive and you could just buy one and replace the one you have, providing the engine isn't tapping or knocking.

Posted on Mar 14, 2011

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