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VELATRANS

MEMBER
2005 CADILLAC STS
84,500 MILES

The check engine light is on. Just came on yesterday, We changed the gas cap but its still on. The code reading at Auto Zone said EVAP leak, gas cap or hose lose. We dont have a lot of money and are suppose to go out of town tomorrow. Any assistance would be great. What should we do?

Thursday, April 25th, 2013 AT 1:33 PM

5 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

What was the exact code number?

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Thursday, April 25th, 2013 AT 2:43 PM

VELATRANS

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3 POSTS

P0422

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Thursday, April 25th, 2013 AT 3:18 PM

WRENCHTECH

MECHANIC
20,761 POSTS

That's not an EVAP leak. It's not even an EVAP code.

Main Catalytic Converter -Efficiency Below Threshold (Bank 1)

It means you need a new Catalytic Converter.

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Thursday, April 25th, 2013 AT 3:47 PM

VELATRANS

MEMBER
3 POSTS

Maybe is p442

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Thursday, April 25th, 2013 AT 4:52 PM

WRENCHTECH

MECHANIC
20,761 POSTS

Yes, that is for a small EVAP leak. The way you find that is with a machine that fills the system with smoke and the smoke will escape through the leak. You'll have to call around to local shops to see which one has a smoke machine.

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Thursday, April 25th, 2013 AT 4:57 PM