I believe that in my case it is border line. I reset the code in the ECM module, Code 035 W/HH and code 13 with impulse scanner(Mixture too lean, O2 at Rich stop limit), drove the car for 35 miles, checked the codes and got Code 1 (No system faults). Over a period of time, it probably goes a little above the 15% adaptation limit and then gives the code.

But, I agree with Steve, the proper fix is to correct the Air/Fuel supply issues.

My fuel economy is in the 20-24 MPG range. Does running lean have any adverse affects on the engine?

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Zafar
94 E320 58000 Miles