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While driving on the highway, not only did my engine light come on (red) but the engine shut off (motor shut off we slowed down, pulled over & turned off the engine..... turned on the engine went on out way, with the engine light on..... any ideas?
You should never drive with a red engine light there is always the risk of further damage to engine,this could mean no or low oil pressure driving like that will damage the engine. Check oil level first check coolant level and get back to me.
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My Buick Le saber gets 25 to 30 on the hi way depending how far I drive but around town I get 12 to 18. The reason is short trips the engine does not warm up so your choke automatically kicks in and does not shut down till the engine is up to temperature. Also Short runs means a lot of changing gears so the engine is reving and slowing down for stop lights etc. To get good milage the engine has to maintane a constant even speed.
the engine light came on and the sensors immediately put the car in limp mode reducing the power to allow you to pull over and do the vital checks (oil -water and engine temperature ). have the fault codes read to see which sensor put the lights on.
They are designed to change as the motor changes speed. If you have 80 lbs. of oil pressure than you have very good oil pressure in your engine. If it gets higher than 80, I would talk to service dept. at your local dealer.
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.
Oil pressure sensor blocked or faulty. both oil level sensor and oil pressure sensor activate the oil light. engine goes into safe mode and shuts off ignition.
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