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+--- Thread: Engine light (/showthread.php?tid=20320)
Engine light - 07focus_st - 07-13-2012
Hey guys quick question I have the sct flasher for 2 yrs now running 91 but I down graded my gas to 87 stock cause I drive to work now but once I put the car to stock I had an engine light code P0455 I cleared it with sct and came back so I tried something using 87 with the custom tune and no engine light why is that
RE: Engine light - ZTWsquared - 07-13-2012
(07-13-2012, 08:35 AM)07focus_st Wrote: Hey guys quick question I have the sct flasher for 2 yrs now running 91 but I down graded my gas to 87 stock cause I drive to work now but once I put the car to stock I had an engine light code P0455 I cleared it with sct and came back so I tried something using 87 with the custom tune and no engine light why is that
Hard to figure - IIRC that's the gas cap code.
RE: Engine light - GFXjamie - 07-13-2012
Do you have a header?
RE: Engine light - Mystake - 07-15-2012
If its gas cap then it could be a vacuum leak at the egr, if your tune disables it. (which woul be why it goes away when the tune is back in)