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General discussion

Engine Light will not go away

May 24, 2008 7:30AM PDT

Have a 2001 Hyundai/auto/4 cyl/ in the past years I always had a problem with the check eng lite going on after she would fill it.Tight gas cap etc.Would erase the code with my ob2 reader and it would be fine till she went back and out gas in.Now in the past month or so it on and will not go away but for a few moments.Getting code p1143 with is not in her or Haynes manual.
Does anyone think that if I replace the purge selonoid this would take care of the problem or do you have any other idea's.It failed inspection even after I erased the code then came back on.

Mass emmissions.

Discussion is locked

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(NT) How long since they replaced the O2 sensor?
May 24, 2008 11:17PM PDT
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Engine Lite
May 25, 2008 7:23AM PDT

Never I bet I bought with 40,000 miles now have 114,000.You think that could solve the problem.I know the heat sheild bolts will not come out without a tussel

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So far that's my bet.
May 25, 2008 7:27AM PDT

But it's a bet, nothing more. Research that angle.

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Running rich?
May 27, 2008 4:50AM PDT

You might want to check the O2 sensors in that case. When were they last replaced?

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O2 sensor is one guess...
May 29, 2008 12:19AM PDT

Just resetting the trouble code isn't good enough for passing an emissions test. With just about any OBD II system, you'll have to DRIVE the car for at least 50 miles WITHOUT the error code coming back on in order to fully erase any error data stored in the diagnostics system, and then pray that while you're at the testing center the error code won't come back on before you complete the test!

Since in your case the trouble code keeps coming back immediately after resetting, there's really no way you'll be able to get it past the emissions test since it seems something in your car's system is damaged/needs repair.

Beyond the O2 sensor, I'd also check the evaporative system with your fuel filler line; at some point someone may have overfilled the tank several times to the point where too much gasoline entered into the filtering system and actually damaged it. This can cause the trouble light to come on after refuelling the car and also cause it to stay on over time as permanent damage to the vapor filter occurs, but not knowing what code P1143 is for a Hyundai, it's only a guess. But this sort of problem is the reason WHY manufacturers strongly recommend NOT overfilling your gas tank when refuelling.

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Code p1143
May 29, 2008 7:48AM PDT

Thanks I'll check that system that sounds like it could be the problem when the car was new we had that problem went to dealer he said drive it. Any other idea's?

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Cat Conveter?
Jun 2, 2008 12:05PM PDT

scanner didn't tell you what code p1143 was?,Obviously start with the cheapest, o2 sensor 1st, check for smells and holes in exhaust, clean sensors, if not prolly the cat converter, which is very expensive, good luck