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Hi All, I own a honda fit gp1 2012 model which has an ODO of 62,000km. Couple of days ago it suddenly started to indicate the check engine light. We did few scans, one even from St#fford M#tors. All scans indicated that there's a malfunction in Oxygen sensor. Stafford recommended to replace it straight away asked me a ridiculous amount to replace. I took it to a different well known garage and did replace both sensors but yet it keeps indicating the check engine light. A scan would still indicate the same error as previous. Then we replaced the Air filter package. Still the check engine light would not go away. Once the error is erased by the scanner it would start to re-appear again in few minutes after engine turned off and started. Garage now suggested to do a Tune up with cleaning all injectors etc.. Has anyone else faced this kind of a issue before? What would be the cause for this. Also to tell you same day this started to appear I got someone to replace a bulb in the front. It was the right side bulb of the hazard warning lights. Apparently the guy has tried a wrong bulb and a fuse went off causing both lights to non functioning. He then somehow put the fuse back on and fixed the lights with the correct bulb. I actually didn't thought of that far of the replacement and causes of it since that was just a changing a bulb. Could this be any where close the reason for the check engine light? Because it came up only after few mins of replacing the bulb. I know that was just changing a bulb and a fuse . But it came only after that. yet the scanner keeps showing O2 sensor as the error.

My Lancer CK2 (EFI, YOM:2000 ) recently failed the emission test due to high CO. Then i did an engine tuneup and again went for the emission test. This time i got very bad values than the 1st attempt. I went to the mechanic and then he asked me to replace my Oxygen sensor and TPS (throttle body sensor). Now i am getting very bad fuel consumption. Is this happen due to above sensors? If so, please let me know a place to buy them. Thanks in advance.