ssup guyz,i own a 2003 s2000.i recently swapped the engine.new engine has only20k. now i have CEL light,and everything on the car is 100% stock. i scan the ecu and it tells me that there is nothing wrong with the car(no code at all). what could it be?
should i reset the ecu? help~~

 

This is probably not the problem but check your fuel cap and also see if the map sensor is on correctly?

 

If it says no code then there's probably no code. I'd reset as Amer suggested. You didn't switch ECU's while you were at it did you?

 

yes no ecu changed

 

could it be 02 sensor?

 

Please Explain the swap process?

We know that you changed the ECU, and the motor is assumed. But what exactly did you swap?

I did not thinkg you could have a CEL and no code?

Does it run?

 

yes it runs perfect i think, changed oil,clutch and changed front 02 sensor.
but, car kinda stall at the low rpm.

 

i also dont see how the cel light could be on but no code. try to reset it and see if it comes back with a code. or get a new code reader...

 

okay i got the code now....itz p0135-02 sensor heater circuit malfunction (bank 1 sensor 1). im kinda confused becuz the sensors(front and rear) on the car is brand new. and tried to clear the code but it wont dissapear.
and also when i start the engine itz not there, but when i rev the engine then it comes out. could it be the wire of sensor? the ones from the engine or what ever? machanic told me that the computer is not sending anything to sensor. do i have to reprogram the ECU?? help!!!~~~~

 

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