A few weeks ago my engine light came on while I was driving sometimes.. I took it to the dyno, and sure enough the light came on.. It was my o2 sensor on my B18C hybrid.. After the new o2 sensor the car ran mint... I gunned it a couple of times and no check engine light came on ever. Today I took the car to the dyno and the frigin engine light came on during the dyno run... Afterwards going home I reset the ecu, I reved the **** out of it and no engine light ever came on. Basically after the new o2 sensor has been installed Iv'e had no check engine light coming on ever. What on earth is going on here? An yone ever have this problem??? Any imput whould be appricated....

 

was the cel o2 code or something else?

 

do you take an o2 sensor out so you have a spot for the dyno's wideband? or do you just run the car for numbers and not tune?

 

I never take the o2 sensor out when dynoing.. Why do U have to? When I first dynoed when I got the swap this problem didn't occur. The performance shop read the code and it was deffinetly the 02 sensor... Like I said the car never gives me a check engine light on the street ever....Any suggestions still????

 

sometimes if ppl have a fuel controller, it tries to adjust beyond boudaries triggering c/e codes.
greg

 

Thanks for the replys... I acually have a b&m fuel pressure regulater. Would I have to put the stock regulator back so that the engine light doesn't come on??? Or set the fuel pressure regulator to stock settings?????