D17A1 turbocharged... ODB II problems...?
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why does everyone think the CEL is OK? the car is in a safe mode and its not running as good as it should, the light is on for a reason, to protect you and the car in case something is wrong. I would not drive around in it for a long time, you should get it fixed right away. Take it to Autozone, they will let you use a code reader for free...
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Check engine light comes on doesn't mean it will go in to limp (safe) mode. Only fuel management related, knock related (minium effect such as from bad gas), fluid warning starvation, excess temperature will put the ecu into limp mode. But no one ever gave the exact tolerence of such settings. Helms manual is also very vague with it. Even after memorizing my helm's manual, I still can't tell you what values will put the ecu into limp mode. So in term, it is best to get rid of that light, no matter what it is. Also, it is a plus to pass inspection. ^o^
as for removal of single o2 in a duel o2 system (OBD II), the ecu knows about the missing sensor and it will still be able to use the 2nd o2 voltage to correct close loop settings; which will still allow standard map settings. But the situation will be different if any of the o2 sensors are active but are bad. If any of those 2 gives out irratical readings, the ecu will automatically put itself in limp mode.
RobbUsaF, "running rich" is not exactly what you think it is. At WOT, the ecu doesn't care about the o2 reading, and with f/i at WOT, we have to run rich to avoid detonation. The "running rich" code you are getting is the error caused by ecu's inability to correct over riched closed loop a/f ratio. For factory ecu, it is constantly correct the fuel to get the sto of 14.7 a/f ratio at close loop to get the best gas milage. Since you are using a machanical fuel manipulating device, the ecu has to fight with it. And of course it is going to lose. That is why it raised the red flag, then you will lose when you get to inspection. LoL
as for removal of single o2 in a duel o2 system (OBD II), the ecu knows about the missing sensor and it will still be able to use the 2nd o2 voltage to correct close loop settings; which will still allow standard map settings. But the situation will be different if any of the o2 sensors are active but are bad. If any of those 2 gives out irratical readings, the ecu will automatically put itself in limp mode.
RobbUsaF, "running rich" is not exactly what you think it is. At WOT, the ecu doesn't care about the o2 reading, and with f/i at WOT, we have to run rich to avoid detonation. The "running rich" code you are getting is the error caused by ecu's inability to correct over riched closed loop a/f ratio. For factory ecu, it is constantly correct the fuel to get the sto of 14.7 a/f ratio at close loop to get the best gas milage. Since you are using a machanical fuel manipulating device, the ecu has to fight with it. And of course it is going to lose. That is why it raised the red flag, then you will lose when you get to inspection. LoL
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tadr88
7th Generation Civic 2001 - 2005
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Jun 8, 2015 12:28 AM
