Question about 2003 Toyota Camry

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Check engine light comes on and slide whistle noise

Check engine light came on, guy looked at it and said it was leaky gas cap. Light came back on today. Gas cap not replaced yet.

A/C wasn't blowing cold, condensor was replaced and now car making a "slide whistle sound" only when the A/C is on.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Check engine light comes on if gas cap is loose

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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SOURCE: my camry's check engine light came on and the

The EVAP system on OBD-II equipped vehicles is monitored by the computer. When the gas cap is bad, or if there is a break in the system somewhere, this alerts the computer (ECU) of a problem and the ECU will turn on the check engine light to alert you of a problem. Although not normal, it is something that can happen and need replacement. You can inspect the filler neck yourself for visible damage (it is the flexible/ribbed hose going into your fuel tank from the filler) and replace the gas cap yourself. i might suggest replacing the gas cap and then having an Auto Zone or Napa reset your computer to see if the cap was the extent of the problem before i paid a shop to replace the filler neck. If the cap was specified as a problem, you really have nothing to lose on pursuing this fix first. Also, if you can order the filler neck, this is a relatively easy replacement and requires only shadetree mechanic skills.

i hope this helps,
matthew

Posted on Oct 21, 2009

Testimonial: "great answer"

  • 133 Answers

SOURCE: I have a 2000 Toyota Echo with a P0440 code on the

Clean the air flow meter with carb cleaner spray and that should do the trick'

Posted on Mar 08, 2010

Testimonial: "Thank you, I will try it this weekend. For how long I"ve been fighting with this, if it works, I could kiss you :) "

duane_wong
  • 6826 Answers

SOURCE: 2003 toyota echo p0442. I have

P0442 Evaporative Emission System Leak Detected (small leak)
not

P0457 which is the gas cap is loose or off.

This means that there may be a leak in the hoses that lead from the gas tank to the charcoal canister, if so equipped.

Good luck on finding the leak and repairing.


Posted on Nov 07, 2010

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Why does the check engine light comes on saying the gas cap is loose or off when it is on tight.


Hi,
looks like there is a sensor on the filler cap/lid side.
which is faulty and not sending correct signal to the main computer in the car.

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sometimes it's as simple as replacing your gas cap. i know it sounds funny but your codes will resd fuel leak or fuel problem, but if you loose fuel pressure by a leaky gas cap, your codes will read fuel issue, as for the check engine light you can resetyour computer by disconnecting the positive cable only from your battery for 5 to 10 mins. the light will go off, but if you have a faulty sensor, it will, come back on. i would look to a bad egr valve befre i would the 02sensors. good luck and thank you for choosing fixya.com

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