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Engine warning light came on motor running rough

Posted by steven dixon on


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David Harrelson

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The check engine light comes on when diagnostic code or codes have been set. Use a scan tool to read the codes, or most parts stores will do this for you, free.

Posted on May 03, 2018


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  • 54 Answers

SOURCE: rough running.

before replacing all 4 ligt them one at a time by removing each screw starting the engine and lifting them one at a time. you may only have to replace 1

Posted on Aug 19, 2008



  • 58 Answers

SOURCE: check engine light is on, motor runs rough, sometimes stalls

Go to Advance or Auto Zone and have them run an obd scan on it and it will pin point why your light is on and could solve your problem. This is often done for free.

Posted on Apr 12, 2009


  • 9 Answers

SOURCE: 2006 5'9L cummins -engine warning light came

on your filter, some place, there should be a small round, hard plastic, see through part. I can't remember what it's called. It has a small plastic hose coming out of each end. It's about the size of a cylinoid, same shape. It's about 30$ at the dealer. It has to do with your air transfer.

Posted on Dec 02, 2010


Alan Conner

  • 359 Answers

SOURCE: ETS OFF warning light and

The ETS light comes on usually in responce to a cooling system problem in Cavaliers. The first thing to do is check your fuses. The Check Engine light always comes on when the ETS light comes on. You need to be concerned with this ETS system first. Usually it is your 30 amp fuse that needs to be replaced. On most cav's the fuse box us under your hood, on the right hand side. There are two fuses that are for the coolent system. Check these fuses first. If the fuse is blown, change it and the dash light should go out. If the fuse blows in a week or so again, then try to read the codes like the guys above say. When the fuse it out, the code reader is just going to say that you need to check your fuse. This is what happened in my car, and my mechanic said it was pretty common in these cars. Good luck.

Posted on Mar 16, 2011


Shane Sterling

  • 59 Answers

SOURCE: 2008 GMC Sierra 1500 50,644 miles check

This problem seems to be the ECM (computer) to have so many things acting up at the same time. Did it all start at the same time? Its possible that you can reset the ECM by removing the hot and ground cables, wait about 15 minutes and then replace them, may fix the problem, may only temporarily fix the problem if the ecm is bad or something is setting a code to cause this. It sounds as if it is running in limp mode. Have it tested at the nearest parts store. They should be able to decipher the problem.

Posted on Sep 14, 2011

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I have a 1998 Nissan Altima and my warning lights came on and car began running rough, eventually car died and has to be jumped to get running again, warning lights continue to come on, I was told it was...

Alternator does not usually cause engine to run rough. You can test the alternator with a voltmeter, if you have one. Measure voltage at the battery with engine running (jumper cables removed). Voltage should be 14-15 VDC. If you don't have a voltmeter, take the alternator off and have it tested at the parts store. Most stores will test for free before selling you a new one.
If the check engine light is on, you might also ask the parts store to scan the OBD II port for trouble codes. hese may tell a bigger story, especially is fixing the alternator is not the cause of roughness.

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My service engine light keep coming on once i reach high speeds over 60 mph

This is a problem that affects many cars and trucks. Usually it is a matter of a tune up. When the sensor detects that the motor is running rough it tells you to service the engine. On my truck this happens at 55mph and above. I really can't feel or hear any roughness, but there is a slight hesitation. So I get a tune up and that solves the problem.
On my Sentra I get a continuous light due to a gas tank cap that won't quite seal good enough to create the required vacuum for EPA standards. Sometimes replacing the cap will solve this problem.

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Sounds like a fuel problem , have you changed the fuel filter in a while ? could be the knock sensor or the knock sensor module needs to be replaced.

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