Question about 2002 Toyota ECHO

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Check engine light comes on if gas cap is loose (according to the dealer) - not really wanting to go back to the dealer repeatedly for a quick fix to turn off the light, but not wanting to ignore the check engine light. Ideas?

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Replace the gas cap .. clean the gas filler pipe where it seals against the gas cap .. .. even a small crack in the rubber seal will trigger the check engine light ..

Posted on Jul 02, 2009

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Engine light on, took to dealer they did a smoke test found out gas cap po442. know 3wks later back on check cap loose again .need a new cap or is it something else. denice


You said nothing about model, make, or year of vehicle, but on most vehicles, you have to turn the gas cap tightly until it clicks a couple of times when putting it on. If you only turn it (lightly) until it stops moving, it can work itself loose. If you are turning it until it clicks and it comes loose, you should replace the gas cap.

Oct 24, 2016 | Cars & Trucks

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Can a lose gas cap cause the engine light to come on


Definitely can. Will possibly trigger check engine light for evap leak

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Check engine light is on, on my 2002 honda accord ex v6


Could be as simple as a loose gas cap or cap seal or a bad o2 sensor. A falty cat. converter will also cause the check engine light to come on. Either way, you need to go either to a dealer or some auto parts stores will plug in the dioegnostic sensor and can tell what is wrong. your gas milage will suffer until you get this fixed. Your engine computer uses the inputs from your o2 sensers to adjust the fuel air mixture of the engine for optimum engine performance.

Sep 18, 2010 | 2002 Honda Accord

1 Answer

F-150 ford truck check engine light keeps coming on


Did you replace the gas cap? Also check the filler tube that's where the gas cap snaps on where you put gas in. The filler tube or neck has a thin lining of plastic at the top look for small cracks in it where the gas cap goes on. It there's cracks in it, it will cause an emission leak and sometimes a dealer won't find it until you spent a lot of money on diagnostics. And it depends if there best mechanic was working on it.

Feb 11, 2010 | 2006 Ford F-150

1 Answer

FUEL CAP LIGHT ON


Hi:
The check fuel cap light is tripped when your cap has been loose or off, and the engine is running. Often you need to have the light reset by a code scanner. If you have checked the cap and it is secure, if you reset the code and it comes back, you possibly need a new gas cap.

Nov 25, 2009 | 2006 Honda Accord

1 Answer

1998 Honda Accord with a engine code(check eng.light) #1259. what do I need to do to fix it. thank you.


The manual for your Accord indicates the following:
This indicator comes on for a few seconds when you turn the ignition switch ON (II). If it comes on at any other time, it indicates one of the engine's emissions control systems may have a problem. Even though you may feel no difference in your vehicle's performance, it can reduce your fuel economy and cause your vehicle to put out excessive emissions. Continued operation may cause serious damage.
If you have recently refueled your vehicle, the cause of this indicator coming on could be a loose or missing fuel fill cap. Check the cap and tighten it until it clicks. Replace the fuel fill cap if it is missing. Tightening the cap will not make the indicator turn off immediately; it takes three driving trips.
If the indicator remains on past three driving trips, or the fuel cap was not loose or missing, have the vehicle checked by the dealer as soon as possible. Drive moderately until the dealer has inspected the problem. Avoid full-throttle acceleration and driving at high speed.
Hope this helps you find the problem.

Oct 23, 2009 | 1998 Honda Accord

1 Answer

2005 dodge Ram 1500 truck 5.7 Hemi check engine lights comes on


Two things you want to know about the check engine light on any vehicle. One is it's an emission warning. The most common cause is a loose gas cap, make sure it clicks when you gas up. Second, is that being an emissions light, is that it'll require some test equipment to find the problem if you checked the gas cap and it's tight. You will want to do that at your friendly Dodge dealer. Why? They'll not only know what it is, it might be fixed free in the emissions warranty which has some parts that are covered longer than the vehicle's regular warranty. The shop on the corner doesn't do warranty work and they're not going to tell you if it might be covered.

Jun 14, 2009 | 2005 Dodge Ram 1500

1 Answer

Gas cap problem 2004 honda accord


go to your local auto part store or dealer and buy a new gas cap

Apr 07, 2009 | 2004 Honda Accord

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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