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SES light came on then off while idling
On my 99 7.3 with 180k miles. Ts chip, muffler delete, and diy intake. Started up the truck this afternoon. Let it idle for a few seconds and looked down to see the SES light on. Put it in gear and started to drive away and it went out. Did not come on the rest of the day and all appeared normal. Hooked it up to scantool and there were no codes. Any idea what is or may have been going on? I've never had an SES light come on without throwing codes?
99 F250 Super Duty Crew Cab 7.3 Powerstroke