Check engine light still on & car runs fine - should I be concerned

[PMR818]

Yellow check engine light has been on for a few weeks. Code is P0174. Didn’t notice anything when it first came on except sudden limp mode for seemingly no reason. Car still ran limp when it was turned off and on so I put the JB4 to map 0 and used up the tank since it had some E85 in it. Been a few weeks since then and I’ve only been running 91 in the tank and I’m back to map 2 and the car seems to have its normal boost and yet the yellow engine light is still on. Any advice would be great…

 

[nhcowboy28]

 

[ChaneRZ]

Reset

 

[Landboat G80]

That’s a lean code, if you’re under warranty make an appointment and get it checked out. If you’re not provide some logs from the JB4 and someone can possibly tell you if you need a mechanic from the logs.

 

[MerlintheMad]

Make the CEL go away, or it will end in tears. That's what my cells tell me.

 

[PMR818]

That’s a lean code, if you’re under warranty make an appointment and get it checked out. If you’re not provide some logs from the JB4 and someone can possibly tell you if you need a mechanic from the logs.

I didn’t know how to clear the cel from the dash until I found a post here about pressing the ignition button twice (when the car is off) with your foot off the pedal and then you clear the code off the JB4 app. That worked for me and haven’t had any new engine lights since… Been tinkering with the FF number on the JB4 which has been interesting (and I think good?) so far with helping prevent over boost — and I think it’s been helping decrease the exhaust whine/rasp a little at lower RPMs.