Quote:
Originally posted by shakran
"I gaurantee that it has something to do with emissions, It's perfectly safe to drive."
sure it's safe to drive but it'll be a pig. Most CEL's on hondas send the system into closed-loop mode, which means default cold-start settings. You'll use gas like a mother. You'll need to figure it out. FYI I have never heard of bad gas causing a CEL. I have also never heard of a code 999 on ANY honda.
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The reason bad gas can cause this is the crap that is floating in it. Whether that crap is water or more likely sediment from the storage tank. Gas stations are actually not supposed to pump gas for a certain number of hours after a fuel delivery but none adhere to it. The reason is all the crap that gets stirred up when the delivery takes place. When that crap gets either burned up in your engine or it passes through the exhaust ports without being burned the sensor gets confused and codes.