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Subaru p0851 adjusted switch light stayed off for nine miles than come back on also readyness monitors only 3 get ready evap and egr wont

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Readiness monitors wont reset


You have 8 I/M or Emission Monitors
3 continuous
5 that have to run

They should run clear after 10 or 15 miles of driving
IF,ALL problems have been resolved

The Evap Monitor will only run every few days

Any person or repair shop HAS TO Road Test with scan tool
until the monitors run,except evap,BEFORE,BEFORE,Your given
the car back

It is NOT,NOT your job to run monitors or drive cycles

You would have no idea what they are, or how to perform
them,some shops don't ,as they have no data base or care
to look up that info

Bottom Line

Your car was not properly diagnosed or repaired (YET)

No Codes on a code reader, is not the same as using professional
tools & enhanced data & other data, to find a problem

Don't need codes present to see or find things that are not right

May 10, 2014 | 2004 Pontiac Grand Prix

1 Answer

CAR WONT GO IN READY STATUS


broken evap line/port on fuel pump. Or leaking fuel pump o-ring
check the EVAP canister it is right next to fuel filter could be pcm needs update to fix false codes. Here is a old hillbilly trick that may help put saliva on the seal of gas cap when you fill up every time that may work for you.

Mar 26, 2014 | 2002 Oldsmobile Alero

1 Answer

Need description of obd drive cycle


This is my drive cycle a generic drive cycle i have used many times over the years and it has never failed me most drive cycles are too specific and impossible to adhere to for most drivers follow these steps exactly 1. make sure all codes are cleared and no check engine light is on 2 make sure the fuel level is between 1/4 and 3/4 full (this is part of the enable criteria for the evap monitor to run ) 3 let vehicle set overnight 4 start engine and let idle until the temp gauge is in the middle (this cold start enables the evap monitor and runs the O2 sensor heater test )5 drive vehicle around town avoid the highway stay at below 50 mph and when stoping at lights remove your foot from the gas and coast from around 50 to about 10mph or less if possible this will run the EGR monitor after about 3 to five miles of this proceed to the highway or freeway and travel over 50 but under 70 mph for about 3 to 5 miles this will run the catalyst test provided the O2 monitors passed if they didnt you will have a check engine light on before this point also i do a coast down on exit ramps (no braking) they make great places to get that EGR to run ONCE YOU START THIS PROCEDURE DO NOT KILL THE ENGINE OR SOME OF THE TEST WILL FAIL TO RUN

Jan 04, 2013 | 1999 Lexus ES 300

1 Answer

Evap code for 1996 Nissan pickup


All you have been doing is clearing the check light on dash &
clearing the obd codes,not diagnosing anything related to
the codes or trying to solve the problem

The Evap Monitor will run when ever it should, based on how
that is programmed into the vehicles computer,no need to drive
80 miles or any miles

You should have a codes for the Evap Problem, if you stop clearing them & that also has nothing to do with an EGR Issue

Oct 17, 2012 | 1996 Nissan Pickup

1 Answer

2002 Suzuki esteem 1.8L I/M Readyness not compleeting


It is not how far you drive it is how you drive. Google this to read more about it Google "OBD 2 Drive Cycle"

Oct 15, 2012 | 2002 Suzuki Esteem

1 Answer

1997 Dodge Caravan ECM will not go Ready, no trouble codes


In order to set the monitor it the drive cycle 2 trip criteria that means you need to have a cold start up and reach operating temperature then another cold start up with a operating temperature reached and the drive for each one is part throttle hold for 2 miles and a decelration for the catalytic to get ready.when the cat is ready the evap runs.If you are loosing monitor at key off and everything reset you can see the referee let them smog it. The EGR and EVAP are almost impossilbe to get ready

Feb 24, 2012 | Dodge Caravan Cars & Trucks

2 Answers

Reset computer in doege stratus wont pass inspection drove 50 miles and computer still didnt reset help


U have to operate the engine at all kinds of diff speeds and drive modes, it is called a OBDII drive cycle, here is how u do one.
1. As soon as the engine starts, idle the engine in drive for two and a half minutes with the A/C and rear defrost on. OBDII checks oxygen sensor heater circuits, air pump and EVAP purge.

2. Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle. OBDII checks for ignition misfire, fuel2_bing.gif trim and canister purge.

3. Hold at a steady state speed of 55 mph for three minutes.

OBDII monitors EGR, air pump, O2 sensors and canister purge.

4. Decelerate (coast down) to 20 mph without braking or depressing the clutch. OBDII checks EGR and purge functions.

5. Accelerate back to 55 to 60 mph at half throttle. OBDII checks misfire, fuel trim and purge again.

6. Hold at a steady speed of 55 to 60 mph for five minutes.

OBDII monitors catalytic converter efficiency, misfire, EGR, fuel trim, oxygen sensors and purge functions.

7. Decelerate (coast down) to a stop without braking. OBDII makes a final check of EGR and canister purge

Jun 02, 2010 | 2004 Dodge Stratus

1 Answer

Vehicle wont Start


you have lost power/check fuseable links,main fuses/and of corse battrey cabels at the battrey

Nov 20, 2009 | 1998 Chrysler Town & Country

1 Answer

Failed Emissions test. OBD II not ready. Code for Low EGR Flow. Found EGR port clogged in intake plenum. Removed plenum and cleaned port, replaced all gaskets, check egr valve with vaccum(OK),...


Rich:

The trick to setting all the monitors is:
Make sure you have more than 1/4 tank of fuel but no more than 3/4.
Clear codes then Do Not cycle key off. Start vehicle and drive,make sure you do at least 2 minutes of steady spead between 40-50 mph and at least 2 minutes at 50-65 mph, usually about a 20 to 25 mile drive will set them..
If you turn the ignition off before the monitors complete then EVAP will have to see a 6 hour cold soak before it will attempt to run again.

Mar 24, 2009 | Mercury Sable Cars & Trucks

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