Question about 2003 Land Rover Freelander

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How many miles do i have to drive a 2003 freelander after the trouble codes were reset to get a reading on the evaporator system monitor, thecatalyst monitor and the heated oxygen sensor can be tested on diagnoistic equipment after resetting the trouble codes all i am is getting a incomplete reading on my obd2 test equipment

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  • Land Rover Master
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Well you can drive at least 40 to 60 miles,

Posted on Jun 19, 2010

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I have a 2002 honda accord 4 cyl. that is reading on obd2 7 monitors ready ,1 inc egr , can anyone ell me what this means if it is not ready.


Whenever power is completely removed from a vehicle (disconnect the battery), active trouble codes are erased and all system monitors are reset. This is primarily to prevent 'turning off' the check engine light just before emissions inspection. Most states require that all monitors (or a specific number of them) be in a 'ready' status.
For the monitors to 'pass' checks and attain a 'ready' status, specific conditions must be met, usually involving 'drive cycles'. Some system monitors will reset very quickly - one drive cycle or less. Some take longer - more drive cycles or other conditions (usually the evaporative emission cycle requires fuel be between 1/4 and 3/4 of a tank of fuel).
If your car recently had the battery disconnected or replaced, you may have to drive it a few more times to get all monitors into a 'ready' status. If the EGR (exhaust gas recirculation) monitor does not reset, check with a dealer or a good garage on what parameters must be met to reset this monitor.

Aug 26, 2017 | Honda Cars & Trucks

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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

2 Answers

How to reset computer when engine light is on so I can pass emissions on 2004 avalanche


Have you fixed whatever caused the code to come on? If not you will not be able to clear the code and pass emissions. Two reasons - 1. If the problem has not been repaired the check engine light will come back on. 2. Clearing the codes usual means that the OBDII monitors will also be cleared. There will be a code stored for this until the monitors are complete. If they see this co they know what you are up do and you do not pass.

Apr 09, 2013 | 2004 Chevrolet Avalanche

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No codes but EGR valve will not reset


Do you see a warning light ? The first step is always checking for stored OBDII fault codes.

If you cleared codes and one monitor will not set up after driving for 250 miles a code should be logged for that system failure.

Here is a previous fixya post describing the monitor set up drive cycle.
What is the drive cycle to reset computer on 2001 chey impala 3 8l v6

Aug 10, 2017 | Chevrolet Impala Cars & Trucks

1 Answer

I have a 2003 Kia sorento 3.5 liter engine 2 wheel drive. Check engine light on reading code P0453 Evaporative Emission system pressure sensor / switch high input. Any idea what is the cause of this...


possible causes--- p0453-- - Rubber hose to EVAP control system pressure is clogged, vent, kinked, disconnected or improper connection.
- EVAP control system pressure sensor may be faulty
- EVAP posible solutions, - Retight gas cap - Replaced EVAP Control System Pressure Sensor. have a good day !!

May 19, 2011 | 2003 Kia Sorento

1 Answer

My 2003 Toyota Solara will not pass inpection because the EVAP and catalyst monitors won't become ready. I have driven over 400 miles on highway and another 90 around town and have done a Toyota recommened...


Both of these monitors won't run until the oxygen sensor monitor has run. The oxygen sensor monitor won't run if an Engine Coolant Temperature (ECT) sensor Diagnostic Trouble Code (DTC) is stored. So, did you replace the errant coolant temp sensor? I take it you did and reset the codes. But you need to check the codes again and see if there are any that returned or are pending. A pending misfire code will not allow the oxygen sensor monitor to run. (Pending codes will not turn on the check engine light.)

This information is from Haynes Techbook "OBD-II" (No. 10206) Chapter 6, p. 14-16
(Highly recommended reading!)

Feb 06, 2011 | Toyota Solara Cars & Trucks

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Trouble code shows po452 which is the evap


P0452 Evap.Emission System-Pressure Sensor Low Input

The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

Feb 12, 2010 | Hyundai Motor 2003 Elantra

1 Answer

2001 Ford F150, need to know On Board Diagnostic reset timeframe


Take it to auto zone and have them scan the computer to see if there's codes. If you want to reset it by driving it might take up to 100 miles and you'll have to drive it in the city and freeway until the computer relearns all of its settings. I would just take to auto zone and have them reset it, its faster.

Mar 24, 2009 | 2001 Ford F150 Styleside SuperCrew

1 Answer

Engine malfunction light came on


As with any check engine light, the only way to find out what the issue is is to have the code read. The dealership can pull the code and let you know what the issue is.
Before considering driving the vehicle to the dealer though, check the obvious: oil level, coolant level, transmission oil level.
If your uneasy, have it towed.

Mar 03, 2009 | 2004 Land Rover FreeLander

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