Quote:
Originally Posted by red_frs
I recently installed Tsudo UEL headers onto my car, after a couple of weeks I got a CEL and traction light. The code is P0171, I've replaced my fuel ratio sensor and cleaned the throttle body. Can't seem to figure out what wrong. I also made sure to get an OFT2 tune with the headers as well.
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Everything bolded has zero to deal with a TCS light.
Maybe if the car was slipping with the small increase in power.
Maybe caused by the tune but both are unlikely.
CEL might be from the tune.
Also might be from the TCS light.