98 Hyundai Elantra, excellent condition, 50k mi. Lamp flickered out, check engine light came on, and engine started running rough at precisely the same moment. Strange coincidence. Of course I'll change bulb before doing more.
2007-01-02 14:19:45 · 10 answers · asked by g s 2 in Cars & Transportation ➔ Maintenance & Repairs
Probably caused by a voltage surge (caused by a shorted out wire somewhere), that's why they happened together. NO, the headlight has NOTHING to do with the engine performance! But the SHORT WILL. Find the shorted out wire, fast. You'll just end up blowing up another headlamp if you don't. This was NOT a coincidence. Get your engine computer analyzed and read. Then you will find out where the problem is. Autozone will do it for free if you ask them.
2007-01-02 19:07:23 · answer #1 · answered by MrZ 6 · 0⤊ 0⤋
Nope, no relationship. Check engine light on most vehicles is connected to the oxygen sensor. If it started running rough and set the check engine light, something failed and caused a change in the exhaust gas stream.
2007-01-02 14:22:57 · answer #2 · answered by Vinny 4 · 0⤊ 0⤋
?? Really wow?, I don't think it would have anything to do with one another, unless the voltage regulator went out in the alternator, or the battery blew up. Advance Auto Parts and Auto Zone can check your engine light for free. Try that and then go from there.
Good Luck.
2007-01-02 14:24:01 · answer #3 · answered by mikhailwv 1 · 0⤊ 0⤋
Should be no relation between these two phenomenon, unless your voltage regulator went out and roasted some electonics along wiht the light (pretty rare). Check battery voltage at idle and 2,000 rpm. Neither should exceed 15 volts. If they do, replace the alternator (it has the regulator in it).
2007-01-02 14:23:07 · answer #4 · answered by bobo383 3 · 0⤊ 0⤋
It's a coincidence. The headlight shouldn't affect engine performance.
2007-01-02 14:21:26 · answer #5 · answered by Stimpy 7 · 0⤊ 0⤋
You don't give the engine size, but it may be the cam position sensor under the distributor cap. This sensor consists of a magnet that senses the position of the cam and adjusts the firing accordingly. It may also be your automatic choke, but with the engine liht on I would check the CPS.
2016-05-22 21:37:40 · answer #6 · answered by ? 3 · 0⤊ 0⤋
I'm suspicious because everything happened at once. Hyundai are dependable autos. Make certain that the headlamp is truly burned out. If it is still intact check the electrical system. Wiring harness...
2007-01-02 14:24:34 · answer #7 · answered by Joe Schmo from Kokomo 6 · 0⤊ 1⤋
the head light shouldn't mean anything, but the check engine light does, get the codes scanned :(
2007-01-02 14:22:44 · answer #8 · answered by Anonymous · 0⤊ 0⤋
nope - headlight is unrelated
need to check oil level,
.......radiator water level
.....battery water level?
have 'check engine' light diagnosed - should tell the mechanic the major problem need to be addressed
2007-01-02 14:23:07 · answer #9 · answered by tomkat1528 5 · 0⤊ 0⤋
Sounds more like your battery was going dead and the lights went out and it ran like crap at about the same time.
If this is the case, battery and alternator need looked at.
2007-01-02 14:23:18 · answer #10 · answered by Anonymous · 0⤊ 1⤋