P0401 Code cleared by MAP Sensor change

[ZZman]

I got a P0401 code(EGR insufficent flow) on my 2000 Sebring convertible. I took the EGR valve off and cleaned it and put it back on. The code stayed off for a week and came back on.

I bought an EGR valve and a MAP sensor and decided to put the MAP sensor on first. As soon as I did the code cleared and it purrs like a kitten now.

Is this odd?

 

[ewetho]

If your Chrysler is like mine the MAP is the dominate sensor of the car. Uses MAP versus throttle position tweaked by O2. Sure a little CTS and IAT for fuel map adjustment but that MAP is key. It is also what is used to detect EGR flow. If it is wacky you got NUTTIN!!!

 

[Colt45ws]

Yeah, Chrysler likes their speed density. It was probably looking for a change in MAP when it opens the EGR and it was not seeing it.

 

[mechtech2]

This is a problem with codes.
If a code is for a lean O2 sensor, it is not necessarily the sensor that is bad, but whatever is causing the lean condition.
The inter relation of various parts and sensors causes code confusion.