Question about 2004 Chevrolet TrailBlazer

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Check engine light has come on a few times tighten gas cap and it goes off this time light stayed on changed gas cap

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    gerard holdrinet May 08, 2014

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The problem has nothing to do with the gas cap. There are a thousand reasons why the light could be on. Have a repair shop scan the computer for trouble codes and they can recommend what needs to be repaired.

Posted on Nov 12, 2010

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3 Answers

Why did the check engine light come on


The check engine light usually comes on due to emissions issues. I'd bet that tank of gas was the culprit. Run it nearly empty and then fill up again. If it doesn't go out in a few days take it to an auto parts store and have them read the code. At that point my guess would be O2 sensors.

Jun 12, 2014 | 2003 Buick LeSabre

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Engine light,


99% of the time, the gas cap wasn't tightened properly, or is leaking. Make sure you twist it tight and it clicks a few times. If the "Check Engine" light stays on after a few days, buy a new gas cap. Again it may take a few days to clear.

Jun 14, 2012 | 2002 Dodge Grand Caravan

1 Answer

Service engine light came on, was told it is due to gas cap not being on tight. Does this sound correct


This happens all of the time. The light usually goes out within a short time after the cap is tightened, up to a few days.

Even a strand of hair caught between the gas cap seal can cause the evaporative emission system to trip the warning light. .

Good luck!

Mar 28, 2012 | 2004 Chevrolet TrailBlazer

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I have honda odyssey and the service engin coms on and the cod is p1456 so ineed to figur out thanks.


This probably means:
  • P1456: Evaporative Emission Control System Leak Detected (Fuel Tank System)
  • Usually this is because your gas cap was not fully tightened. Be sure to turn it until you hear a click.
  • After you tighten the cap, it might take a couple days of driving before the light goes-out.
  • Be careful to tighten your gas cap regularly, because otherwise it puts a heavy strain on your emission system.
-

Mar 03, 2011 | 2000 Honda Odyssey

3 Answers

Engine check light comes on and stays on for awhile then goes off. Dometimes when I fill the gas tank the check engine light comes on. is something to do with the gas cap or the instrument lights.


IF IT COME ON EVERY TIME YOU GET GAS.GAS CAP HAS BAD SEAL IT MORE LIKELY YOUR PROBLEM BUT LET AUTO ZONE SCAN IT FREE TO SEE WHAT TROUBLE CODE YOU ARE GETTING.

May 23, 2010 | 2003 Pontiac Bonneville

2 Answers

Check engine light came on. Code P1456.


Did you change the gas cap with a Honda gas cap? Tighten it at least three clicks?
Also, Honda recommends that you never top off the tank when getting gas (only go to the click-off of the pump; otherwise you can get back flow into the system that will cause the code).
Tightening or replacing the cap will not immediately cause the light to go off; it can take up to three days of driving for the light to reset.
To check if your readiness codes (emission system) are set, turn the ignition to ON (II), without starting the engine. The Malfunction Indicator Lamp will come on for 20 seconds. If it then goes off, the readiness codes are set. If it blinks 5 times, the readiness codes are not set.
You can, of course, try resetting your engine light to see if it will come back on (which it probably will). I believe the procedure is:
Turn off the engine.
Press and hold the Select/Reset knob (odometer) in the instrument panel, then turn the ignition switch to ON (II).
Hold the knob for approximately ten seconds until the indicator resets.

Hope this helps you.

Nov 17, 2009 | 2004 Honda Pilot

1 Answer

When I'm on the road my check engine light comes on but it happens at different times, sometimes it never comes on or sometimes it comes on a few miles down the road. when I turn my car off then turn it...


The most common cause of this is the gas cap not being tightened completely after re-fueling or a worn rubber gasket on the cap.Remove the gas cap and turn it over and check the gasket if it looks like it's not worn put the gas cap back on and then tighten it until it clicks several times, then it make take a little while before the check engine light goes off. If this still happens shortly after tightening the gas cap have the check engine code read at an Automotive Parts store. Some stores have the code readers and they'll get what the code means and advise you at that point.

Aug 28, 2009 | 1993 Lincoln Town Car

1 Answer

Check engine light


Sorry your going to have to change the gas cap. You can try  spraying WD-40 to the rubber seal on the gas cap to get you some more months out of it, the seals get hard and don't seal any more. Good luck

Apr 08, 2009 | 2004 Toyota Prius

7 Answers

Check Engine Light Comes on Intermittently


The P0141 code points to the O2 sensor heater circuit. It could be that there is a short in the wiring to the O2 sensor or it could be that the O2 sensor heating element itself is bad. The code is for O2 sensor Bank 1 Sensor 2. Bank 1 means its the O2 sensor connected to the exhaust pipe that runs to cylinder #1. Sensor 2 means that it is likely the O2 sensor after the catalytic converter on the same exhaust pipe.

Dec 31, 2008 | 2004 Honda Accord

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