Persisting 2-3-1 and 2-2-1 lambda codes
By 93M47
My 93 245 has been running the lambda codes 231 and 221 for lean/rich at part load, and I was advised to replace the MAF (Delphi) and check for vacuum leaks, both of which I have done and upon clearing the codes and turning the car back on, the codes returned. The car struggled on power at cold starts but drives normal once it is warmed up. Any advice on what I should look for next to try to get these codes cleared?




