Check Engine Light Turns On and Off

VienoMounivong · Post by **VienoMounivong** » 14 Aug 2018, 08:05

I have a 2006 S60 and was wondering why my check engine light turns on and off? I have filled it with 89 octane the past two weeks, but before that I have filled it with 93 octane always.

Post by **Rattnalle** » 14 Aug 2018, 08:07

You need to hook it up and check for error codes. The engine light only tells you there's a code.

Post by **abscate** » 14 Aug 2018, 23:26

It probably has no correlation to the fuel change, either.

Most of the Auto stores will read codes for free, get the list of Pxxxx codes, where xxxx are numbers. Don’t settle for the “MAF is bad” diagnosis

Politely decline the oxygen sensor they want to sell you.

Cookie-the-Swede · Post by **Cookie-the-Swede** » 16 Aug 2018, 07:11

It's most likely your gas cap. Check that first.