Question about 2004 Saab 9-3

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Engine Light Came on... Tightened Gas Cap... Still on! Is there something else I can check... Everything seems fine...

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Most on-board computers will require some kind of a reset command to erase existing stored error codes and there is no consistency between brands. Some will erase the stored error codes after some number of starts (or key cycles), our Jeep requires 50 cycles and no interim repeat of the original code.
We own no vehicle for which we have no aftermarket service manual since these contain that type of info. Haynes or Chilton are the main sources and they cost ~$18-$30 US.   

Posted on Oct 06, 2008

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What is the likely fix for a P0045 "Large Evap Leak" code on a 2001 Dodge Grand Caravan?


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Have a 2010 Ford Fusion check engine light came on had it scanned at Autozone. Code stated that it was my O2 sensor. Now my check fuel fill inlet warning has came on. I do not have a gas cap, it is the...


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The check gas cap light has gone on numerous times over the last few weeks. I bought a new gas cap at Autozone. It seemed fine and the light went on again and off again. The engine light is on. What...


if the gas cap is installed properly(tightened),then you could have a code in the computer for the evap system that should be checked into.you will have to know what the code is to find what area of the system that needs to be checked out.

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You shouldn't have anything to worry about. A loose gas cap will throw a check engine code in most newer vehicles. As long as you tightened it up, you are fine. The light sjould go off on it's own before your next refill, but if it doesn't take your car to an Advance or Autozone and they will clear the code for you for free. There is no danger in driving your car with the light on for this trouble code. Have a great day.

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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

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Check engine light is on, but the car seems to be


The purpose of the check engine light is to inform the driver that the car's ECM has registered a problem. It then stores a code in it's memory that can then be "pulled" by a hand held diagnostic trouble code reader and usually the issue an be corrected. More times than not, the car will seem to be running fine even with the light on because the ECM will compensate for the problem as much as it can to keep the system functioning. One thing you can do is remove the gas cap and put it back on making sure that you securely tighten it until you hear 3 clicks. After driving the car for 30-50 miles, the light may go out. If it does then the gas cap was not tightened completely causing air to enter the system (the system utilizes vacuum so it must be sealed air tight). If the light stays on, take it to a Dealer or trusted mechanic for further inspection. ALWAYS BE SURE YOUR GAS CAP IS TIGHTLY SECURED AFTER EVERY FILL UP OR THE LIGHT WILL COME ON AGAIN>

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Engine light came on, gas cap was loose


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May 16, 2009 | 2003 Toyota Camry

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Check engine light on at 90500 miles 2003 toyota camry is this just a reminder light for scheduled maint.?


Your check engine light usually means there is an issue with your emissions control system. The last time mine came on, I found that my gas cap wasn't on tight enough. I turned it on tightly and the light went off after 30 miles or so. Start there.
If you've tightened the cap and the light is still on after 30 miles, you may have a bad gas cap OR maybe you just got some bad gas at your last fill-up. Try a few gallons of high-test and drive it a while. If nothing changes, a new gas cap is probably the next cheapest option. Good luck.

Apr 15, 2009 | 2003 Toyota Camry

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