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Hello, my daughter is the proud owner of a 2004 civic DX with an ongoing P1457 code. The car has been looked at by several independent garages as well as the dealer and the code still persists. All visits to the repair shop are always prior to her etest in the hopes of getting a pass. She has always got a pass following a $200 to $300 repair bill only to have the light come on shortly after leaving the shop. Her etest is required in March and I was looking for advice knowing the etesting requirement is cancelled in April. I have read vehicles that are 2001 and newer are allowed to have the evap monitor unset so long as this is the only monitor unset? Is this correct. Can she erase her codes and turn off her mil light and get an etest prior to the evap monitor setting a code? As for her repairs she has had most if not all parts associated with the evap system replaced, as well as an O2 sensor by the dealer. Any help or suggestions would be appreciated.

 
Rep Power: 223

Where do you live?

 
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The car will be e tested in Lindsay Ontario

 
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Ok I live in Ontario as well so it will pass with one monitor not ready.
Do you have a scanner? If not you should get one, you can get a Bluetooth one on Amazon that works with your phone for like $20. That way you can watch the monitor status.
Clear the codes and start driving, check the monitors every 10 mins, once there's two not ready (evap and something else) check more frequently, once you only have the evap not ready, go get it tested ASAP and it should pass. I've done this with a few different cars.

It's probably leaking at the solenoid on the canister near the gas tank, if you hit it with soapy water you will probably see it bubble

 
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Thanks for the help Colin, I just learned that the evap monitor won't run if the tank is more than 85% full or less than 15% full. We will watch the monitors as well as keep the tank full. I'll let you know how it works out.

 
Rep Power: 519

The EVAP system is tested using engine vacuum.

Would there ever be enough pressure in the system to show soap bubbles on a leaking solenoid? (maybe parking in a heated garage or something?)
When I took that one picture I had the canister assembly off of the car and had shop air plumbed into the unit at regulated 1 PSI

 
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That's about it slumper, she has returned to the dealer who told her they will look at the code, if it is not the same code it will be 90$, then we will add the repair costs.

 
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Right my mistake

 
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But your way is portable, quick and effective, and doesn't require a compressor

 
Rep Power: 229

I don't know if this will work for that exact code. But some evap codes are caused by a leaking gas cap/loose gas cap.