Emissions fail on 2001 BMW X5

I'm having problem with the Oxygen Sensor Heater and Evaporative System "Not Ready". Therefore, if won't pass. Does anyone know what the "Drive Cycle" is for the X5? Thanks archie

by in Danbury, CT on February 12, 2011
2 answers 2 comments
ANSWER by , February 12, 2011
Try this: Make sure the fuel level is between 1/4 and 3/4 and the engine is cold. Start engine, idle cold for approx. 2 min, 10 secs. Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs. Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins. Decelerate and come to a stop. Idle in gear for approx 5 mins. WARNING! It is absolutely essential to keep the RPM's below 3,000 and the MPH below 60 for the duration of this test! This won't be easy to do, unless you have access to a dyno or a race track, since traffic conditions could ruin the whole procedure and you have to start again with a cold engine. Zee
COMMENT by , February 13, 2011
Thank you very much! I'll give it a shot. archie
ANSWER by , March 21, 2011
I had the same issues. The drive cycle is between 30-35 miles. Derek
COMMENT by , March 21, 2011
It's not about mileage, it's about how to drive the car. I can drive a car for hundreds of miles and the drive cycle won't be ready. Zee