I got my car chipped with the Stage 1+ APR 2 months ago.

The car is giving me the CEL and when I vagcom the car it has logged O2 Sensor and running to lean. I have cleared the codes and they come back within the day.

Is this normal, do I have to upgrade something else?

Also what is the max speed that I should be hitting with the APR values? I took the car out to some back roads to check out my top speed and the most I got was 135mph... is this normal or should I be getting more?


Thanks in advance.