greeni70

I recently purchased my 01 Civic EX w/75,000 miles and had the CEL come on. It read P1457 only, so I tried a new Honda gas cap and had it come on again. Read the code and this time I had P0133 (o2 sensor CKT slow response, bank 1 sensor), as well as the P1457 (evaporative emissions control system leakage, evap canister system). Any suggestions? Does it seem like there may be a problem with one of the evap components that has now caused the o2 sensor to foul, or could the bad o2 sensor have caused the p1457 originally, while not throwing a code itself (meaning that my problems are just a bad o2 sensor)? The car also came with an Injen CAI installed (not sure if that would be relevant in this case or not). Thanks for your help!

ezone

P0133: Normal cause is a bad O2 sensor. Use the correct DENSO sensor (make sure the original sensor was stamped "denso". If it was an NTK sensor then use that brand).



P1457 could be any of several things.


(P1457 is for the canister half of the system, not the gas tank half. A gas cap will not fix the code.)

FIRST, each of the solenoids needs checked (PCS, CVS, BPS). Apply power and ground and listen for each one to click.
Replace any that don't click, and that's usually the end of it.
The usual culprit is the CVS valve stuck open.

If the CVS valve clicks, do a leak check on its hose anyway. Some of them do leak even though they click.




BUT if all 3 solenoids pass and there are no hoses chewed, disconnected or split open and the canister is ok (not cracked open), then these bulletins may address oddball causes that are NOT the usual failures:

http://ww2.justanswer.com/uploads/hy...ivic_p1457.pdf

http://ww2.justanswer.com/uploads/ac...t_solenoid.pdf


And lastly, be aware that overfilling the gas tank can cause some EVAP codes too. Pull the nozzle out when the pump shuts off. Don't keep going to stuff the next dollar in.

greeni70

Thanks for your reply. Read the code again today, after it came back on, and now it's just P1457. I'll probably try replacing the CVS valve and go from there.