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BigBob, Shop Manager/Technician
Category: Car
Satisfied Customers: 4838
Experience:  Shop Manager with 25 years experience
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2002 Sonata: CA. smog..: catalyst..evaporative..ready oxygen sensor

Resolved Question:

My 2002 Sonata will not pass CA. smog because the: catalyst is not ready
evaporative system is not ready
oxygen sensor not ready.
I have been informed that you must do a drive cycle twice. What is the drive cycle?
Submitted: 6 years ago.
Category: Car
Expert:  BigBob replied 6 years ago.

BigBob :

Greetings and welcome to just answer!!!!!

Expert:  BigBob replied 6 years ago.

Drive Schedule Notes:

  1. Coolant needs to be within 0 to 40 C (0 to 104 F) at start.
  2. Fuel level must be above 15% .
  3. When decelerating from 50-55mph there needs to be at least 5 seconds of fuel cut-off; its best to close throttle as soon as possible for 5 seconds to assure decel fuel cutoff occurs.
  4. Try to maintain constant throttle as much as possible during the steady state speed portions of the drive cycle.

Cautions :

  1. This schedule is best driven on a dyno if available, otherwise find the best road with least traffic
  2. Obey speed limits and drive safely.
  3. If you lose the schedule due to traffic, attempt to get back to it when conditions are safe to do so.
  4. Keep your eye on the road and avoid looking at the schedule constantly; its best to have a passenger describe the schedule to you while driving

Please let me know if I can help further,
Customer: replied 6 years ago.
Is there a certain number of miles that need to be driven?
Expert:  BigBob replied 6 years ago.
Miles do not matter it is the times shown that matter. You will idle for 5 min, then go 0-50 in 15 seconds for 8 min. then you will go 50-0 within 15 seconds then idle for 15 seconds, etc etc.

Customer: replied 6 years ago.
How many times is this procedure needed?
Expert:  BigBob replied 6 years ago.
Officially you only have to do it once and the monitors should set. I have done a drive cycle up to ten times to get it to set. You have to follow it to a tee, if the cycle is broken or taken too long you will have to start over.

Please let me know if I can help further,
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