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David Dill
David Dill, Dodge Technician
Category: Dodge
Satisfied Customers: 1314
Experience:  19 years as Technician, 14 years with Chrysler Group LLC
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Code that says Closed loop fueling not achieved mean?

Customer Question

What does the code that says "Closed loop fueling not achieved" mean?
Submitted: 6 years ago.
Category: Dodge
Expert:  David Dill replied 6 years ago.
Have you done any modifications to the car?
Customer: replied 6 years ago.
No, I had a K&N filter in the stock housing, but thats it and have taken it out. I pulled the codes again and it is showing a code for random misfire, I had it towed to a dodge house this morning, but they are busy, and arent sure when they will be able to get to it.
Expert:  David Dill replied 6 years ago.
There are several checks to do for these 2 codes. They are virtually identical codes for each side of the engine. So something common to both sides is causing the O2 sensors to not do their job. Coolant temperature, map sensor, pcm and fuel system would affect both sides where as an O2 sensor is not likely. Hopefully the data they can get from the scan tool will lead them in the right direction. Keep me informed as to what they find.