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2001 Toyota Land Cruiser Base 4dr 4WD (GS)

2001 Toyota Land Cruiser
Trim Info:
Four Wheel Drive, 4 Door, Sport Utility Vehicle
13 mpg city / 16 mpg hwy
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September 2, 2010, 11:27 am

Sharen S

Question: What is the drive cycle to reset to readiness after repair

My check engine light came on and I had it repaired. But it failed emmission because it had not completed it's 'drive cycle'. I was at "3" and needed to be at "8 or 9". How many miles must you drive in order for the drive cycle to reset?

September 3, 2010, 6:37 pm

Ron W
Expert Mechanic

The drive cycle is designed to run the OBDII monitors for your car. Monitors are basically tests that the computer performs to check if it's systems are working properly. The O2 test (usually at cruise for a couple of minutes) checks the switching ability and the switching speed of the O2. If it fails any part of the monitor, the SES comes on. Some people's driving habits may not let the car meet the criteria to run one of the tests, so if the test doesn't run, the computer doesn't know it has a problem, and the SES light doesn't come on.

The best thing to do to try and run all the monitors is to drive 50 or so miles mixing up highway and city driving, then have the monitors checked. If they all haven't run, you'll have to continue driving and checking until they run. There is no set mileage to run all the monitors.

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