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Drive cycle creating readiness/monitors

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What monitors do you want to set? There are different procedures for each one.

Posted on Mar 29, 2014

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2002 Hyundai Elantra that says my on board computer is not ready to be tested. Emission results are: readiness- fail, monitor comprehensive- not ready, monitor EVAP not ready,monitor O2 not ready.


Did you recently clear the trouble codes or disconnect the battery? Once all codes are cleared, the computer will not display systems 'ready' until they go through an evaluation cycle. Some of the systems require a certain number of drive cycles before they will display 'ready'. A drive cycle is usually starting the engine from a cold start (based on coolant temperature) and driving until certain conditions are met. I don't know what the requirements are for your car, but my 2003 pickup truck requires more than 10 drive cycles before it will make the O2 sensors and evaporative emissions 'ready'. Most states only require that a certain number of systems are showing 'ready' to pass emissions certification.

Oct 22, 2016 | Hyundai Motor 2002 Elantra

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Why do i get OBD/READINESS, Not ready?


Alan, I f you have had battery disconnected or had some one erase codes recently, the computer has to go through what is known as a drive cycle to complete all monitors cycling, some vehicles complete cycle in 10 miles, where as some could take 100 miles or more.
My Toyota EVAP readiness state will not cycle in cold weather and takes thousands of miles before it gets to readiness state.
I think some shops can force systems to run if they have a good scan tool.

Mar 06, 2016 | Cars & Trucks

1 Answer

02 sensor not ready,catalyst not ready


The catalyst is able to oxidize hydrocarbons (unburnt fuel) at about 600 degrees. The air injection pump routes fresh air straight to thecat to aid in speeding up the light off time. once there, the cat stays warm enough to oxidize at all times. The oxygen sensors have heater circuits built in (4 wire vs. the earlier 2 wire O2 sensors, this is why they're referred to as HO2S; Heated O2 Sensors) As for the term "Not Ready" this applies to one of the monitors run by the PCM the Emissions Monitor. EGR flow, O2 sensor operation, catalyst temp are all monitored by the PCM so it can decide whether it will run in Open Loop (ignoring O2 sensor inputs) or Closed Loop (adjusting fuel trim by reading the O2 Sensor input) To change a monitor status from "Not Ready" to "Ready" is as simple as driving as per TRIP guidelines. Once a TRIP is completed (a TRIP is an acronym don't remember what it is right now, but a TRIP is different than a drive cycle) then monitors will have completed and be "ready" unless there is a problem in which a DTC will be stored along with freeze frame data (Mode 6) and if enough key cycles for the individual code (Some are instantaneous, some are 3 key cycles, some are 5, and some are successive key cycles), then a MIL or Check Engine Light will turn on as well.
Hope this helps

Mar 08, 2013 | Cars & Trucks

1 Answer

What is the drive cycle after changing the catalytic converter on a 2001 pontiac grand prix


there is no drive cycle, just get in and go. But if youre asking for the cycle on the readiness monitor for the CAT. it will take several drive cycles for that monitor to run to see if the new CAT. passes or not.

Apr 25, 2012 | 2001 Pontiac Grand Prix

2 Answers

What is drive cycle miles to make ready emission test on ford f150 5.0 engine?


a drive cycle is not measured in miles driven but in the type of driving done, here is a ford drive cycle procedure to clear the not ready code.

Ford Motor Company Driving Cycle Description of OBDII Drive Cycle
The following procedure is designed to execute and complete the OBDII monitors and to clear the Ford P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature is outside 4.4 to 37.8°C (40 to 100° F), or the altitude is above 2438 meters (8000 feet), the EVAP monitor will not run. If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be "bypassed" and the P1000 cleared. The Evap "bypassing" procedure is described in the following drive cycle.
The OBDII Drive Cycle will be performed using a scan tool. Consult the instruction manual for each described function. NOTE: A detailed description of a Powertrain Control Module (PCM) Reset is found in this section, refer to the table of contents.
Drive Cycle Recommendations:
  1. Most OBDII monitors will complete more readily using a "steady foot" driving style during cruise or acceleration modes. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion.
  2. Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.
  3. The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".
WARNING
STRICT OBSERVANCE OF POSTED SPEED LIMITS AND ATTENTION TO DRIVING CONDITIONS ARE MANDATORY WHEN PROCEEDING THROUGH THE FOLLOWING DRIVE CYCLES.

For best results, follow each of the following steps as accurately as possible:

Jun 05, 2010 | 1996 Ford Explorer

1 Answer

My smog test was rejected.there are three monitors that are not ready. what is the drive cycle for a 1997 chevrolet blazer


this is complex issue since all monitors need to be ready in 1196/97. After 98, EPA loosened the rules interpretation so it is not so difficult to have the monitors ready.
Drive clycles need to be a combination of city/highway, a number of stops/starts, engine at normal operating temperature, distance driven in each mode,etc.
keep driving in multiple situations and try again.

Feb 13, 2010 | 1997 Chevrolet Blazer

1 Answer

Obd not ready won't pass inspection


It usually takes more than one drive cycle to clear all monitors to "ready".The vehicle may take multiple "from cold" drive cycles and hundreds of miles to clear all.Drive normally with varied driving and include long coasting down stops.Buy a cheap scan tool ($35) and check monitors as you drive.
DO NOT CLEAR CODES or run the battery dead or you will have to start over!

May 29, 2017 | 2001 Pontiac Grand Am SE

1 Answer

Monitors not ready: Catalyst,Evap System, Oxygen Sensor, Egr Syst


Drive it some more. Has the battery been disconnected/replaced recently? The Inspection station should be able to print you out a drive cycle to get the monitors ready also.

Mar 10, 2009 | 1999 Dodge Intrepid

1 Answer

What is the drive cycle for an 01 pontiac aztec?


if there is really no problem with all these things they should be able to clear out the lights when they go to do the inspection.

Mar 10, 2009 | 2001 Pontiac Aztek

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