Having problems passing smog...
#1
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Having problems passing smog...
Ok I have an EP3 and it has about 160k on it. It was throwing code p420.I had a bad CAt so I bought a used OEM one. When I put the used cat on it threw p420 again so I reset the ecu again. It did this twice then finally went away. After about 20 miles of driving. I parked it and noticed the cel light flashes 5 times with key on engine off. When I looked it up it said it was probally a bad map sensor. Well I reset the ecu and then drive another 20 miles and the cel came back on. Well when I plug in my scanner to check the codes there are no codes present, just the 5 cel blinks with key on engine off. Does that mean I might have a bad pcm?
#2
Honda-Tech Member
Re: Having problems passing smog...
When was the last time you changed you plugs? I would run a couple tank fulls of super( for the the ethenhal) and may be run some V-Max fuel treatment through there.
#5
Function > Form
Re: Having problems passing smog...
I think I'll try that next. I usually would start using a bottle of the Lucas every other oil change and it lasts for a 100 gallons of usage. Is the Z-Max available at autozone and places like that?
#6
Honda-Tech Member
Re: Having problems passing smog...
Yea, its like 20 bucks a bottle.....but it pretty much cleans off the backs of your valves in one tank full.....good stuff.
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#8
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Re: Having problems passing smog...
I got off the phone with the dealer today and they told me that the ecu is in learning mode. The ecu is learning map load and that if I take it on a couple hills and floor it for 2 seconds here and there that it will go away. Im posting this for others if they have this problem. Thanks though.
#9
be professional
Re: Having problems passing smog...
Ok I have an EP3 and it has about 160k on it. It was throwing code p420.I had a bad CAt so I bought a used OEM one. When I put the used cat on it threw p420 again so I reset the ecu again. It did this twice then finally went away. After about 20 miles of driving. I parked it and noticed the cel light flashes 5 times with key on engine off. When I looked it up it said it was probally a bad map sensor. Well I reset the ecu and then drive another 20 miles and the cel came back on. Well when I plug in my scanner to check the codes there are no codes present, just the 5 cel blinks with key on engine off. Does that mean I might have a bad pcm?
#13
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Re: Having problems passing smog...
Ok I have an EP3 and it has about 160k on it. It was throwing code p420.I had a bad CAt so I bought a used OEM one. When I put the used cat on it threw p420 again so I reset the ecu again. It did this twice then finally went away. After about 20 miles of driving. I parked it and noticed the cel light flashes 5 times with key on engine off. When I looked it up it said it was probally a bad map sensor. Well I reset the ecu and then drive another 20 miles and the cel came back on. Well when I plug in my scanner to check the codes there are no codes present, just the 5 cel blinks with key on engine off. Does that mean I might have a bad pcm?
Did it throw any other codes other than the p420?
When you last checked for codes with the scanner did you look at the freeze data?
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