OBD Readiness Monitors
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OBD Readiness Monitors
Hi everyone:
99 XK8 here. Recently reset readiness monitors. Since then I have driven about 800 miles on city streets and highways at various speeds. Several monitors have not reset and the local shops have nothing to offer. Any suggestions. I've read the reset procedures and have tried them several times. Any suggestions on what to do? Local shops have nothing to offer. Much appreciated.
99 XK8 here. Recently reset readiness monitors. Since then I have driven about 800 miles on city streets and highways at various speeds. Several monitors have not reset and the local shops have nothing to offer. Any suggestions. I've read the reset procedures and have tried them several times. Any suggestions on what to do? Local shops have nothing to offer. Much appreciated.
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Chances are that something is not right (air leak, aged O2 sensor, ...) but now the monitors have been cleared mostly the car cannot flag codes - you're in Catch-22.
You might see some value that's clearly not right/optimal via OBD live data - if you're lucky.
You might see some value that's clearly not right/optimal via OBD live data - if you're lucky.
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The various EVAP system readiness monitors require different driving and idling directions before they will all finally reset. Some of them also require that your fuel tank be between 35% and 75% full. They can indeed be difficult to reset, but I have done this enough during the past couple of years to where I can now get them all to reset in less than 30 miles of driving and idling by following to the letter the exact directions required to do so. Several miles of clear roads are required, so I do this very early in the morning on a couple of rural roads when traffic is still quite light around here. Which specific monitors on your car are still not reset?
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Jon 89 ...can you give us a full description of what is required to reset these evap monitors and where the status is displayed/symptoms of not having them reset?
Addendum
After typing that I found this ...Not sure if it applies to my 97
Jag OBD DTCs, Drive Cycle, 2003.pdf (161.5 KB, 296 views)
Thanks
Addendum
After typing that I found this ...Not sure if it applies to my 97
Jag OBD DTCs, Drive Cycle, 2003.pdf (161.5 KB, 296 views)
Thanks
Last edited by Pistnbroke; Aug 29, 2022 at 07:03 AM.
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Readiness Monitors
"Here is what P1000 means, in simple terms...
It simply means that the engine control computer (ECC) has not completed its emission systems testing. A vehicle's engine computer must complete multiple self-tests known as Readiness Monitors. P1000 means readiness monitor testing has not been completed."
You need a P1111 to pass emissions inspection in most states.
There have been a lot of posts on "readiness monitors" and people having a hard time getting them all checked off.
It simply means that the engine control computer (ECC) has not completed its emission systems testing. A vehicle's engine computer must complete multiple self-tests known as Readiness Monitors. P1000 means readiness monitor testing has not been completed."
You need a P1111 to pass emissions inspection in most states.
There have been a lot of posts on "readiness monitors" and people having a hard time getting them all checked off.
Last edited by JimmyL; Aug 29, 2022 at 08:12 AM. Reason: typo
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Here in North Carolina, a vehicle can pass the required annual state inspection with ONE readiness monitor not yet cleared and reset. Once the vehicle turns 20 years old, emissions testing is no longer part of the equation. My 1999 Ram falls into that category....
No idea about other states' test requirements so it may be worth looking into on a case-by-case basis....
No idea about other states' test requirements so it may be worth looking into on a case-by-case basis....
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OBD readiness monitors (aka emission monitors) self check the functioning of a car's emission systems. Codes readers indicate whether these monitors are 'ready' to carry out their self testing routines.
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The various EVAP system readiness monitors require different driving and idling directions before they will all finally reset. Some of them also require that your fuel tank be between 35% and 75% full. They can indeed be difficult to reset, but I have done this enough during the past couple of years to where I can now get them all to reset in less than 30 miles of driving and idling by following to the letter the exact directions required to do so. Several miles of clear roads are required, so I do this very early in the morning on a couple of rural roads when traffic is still quite light around here. Which specific monitors on your car are still not reset?
Evaporative System Monitor
Heated Oxygen Sensors Monitor
Read more at: https://www.obd-codes.com/jaguar-drive-cycle
Copyright OBD-Codes.com
Read more at: https://www.obd-codes.com/jaguar-drive-cycle
Copyright OBD-Codes.com
Read more at: https://www.obd-codes.com/jaguar-drive-cycle
Copyright OBD-Codes.com
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The Comprehensive Component monitor is always the last one I have to clear / reset on my wife's 2006 XK8 with the 4.2 engine. The following steps successfully accomplish that task for me:
- Fuel tank level must be between 30% and 85% capacity.
- Start engine from cold, let it idle for more than 12 minutes and 45 seconds.
- Drive away and maintain a steady speed between 8 mph and 80 mph for approximately 50 seconds.
- Coast to a stop and allow the engine to idle for at least 66 seconds.
You have the 4.0 engine so this may not work for you, but it is indeed worth a try....
- Fuel tank level must be between 30% and 85% capacity.
- Start engine from cold, let it idle for more than 12 minutes and 45 seconds.
- Drive away and maintain a steady speed between 8 mph and 80 mph for approximately 50 seconds.
- Coast to a stop and allow the engine to idle for at least 66 seconds.
You have the 4.0 engine so this may not work for you, but it is indeed worth a try....
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The following steps successfully clear / reset the Oxygen Sensor monitors on her 2006 XK8:
- Start engine and bring it up to normal operating temperature.
- Drive between 3,000 and 4,000 rpm in 3rd gear on the J-Gate at a steady speed for approximately 30 seconds. Lift foot off accelerator and coast to a stop within 30 seconds. Do not touch accelerator for 4 seconds after rolling to a stop.
- Repeat the above step.
- Idle engine for 11 minutes.
- Start engine and bring it up to normal operating temperature.
- Drive between 3,000 and 4,000 rpm in 3rd gear on the J-Gate at a steady speed for approximately 30 seconds. Lift foot off accelerator and coast to a stop within 30 seconds. Do not touch accelerator for 4 seconds after rolling to a stop.
- Repeat the above step.
- Idle engine for 11 minutes.
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A note:
Not "reset", but "re-set", as in: set again.
Disconnecting the battery or clearing OBD codes also clears the OBD monitors and you want them set. Or re-set if you prefer.
Not "reset", but "re-set", as in: set again.
Disconnecting the battery or clearing OBD codes also clears the OBD monitors and you want them set. Or re-set if you prefer.
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The USA and other places had terrible pollution problems (from vehicles) causing serious health issues & deaths so decided to do something - it became OBD (now, OBD II).
https://www.obdautodoctor.com/tutori...ors-explained/
https://www.bluestar.com/get_informe...onitors-status
https://www.obdautodoctor.com/tutori...ors-explained/
https://www.bluestar.com/get_informe...onitors-status
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Hi all:
It's been several months. Problem solved finally. All the monitors except EVAP set to ready and the car passed California smog.
The reason I'm writing is to tell you what finally fixed the issue. I spent months following everyone's suggestions on drive cycles and the CCM and EVAP never set to ready. Over that period, I would see random 'restricted performance; warnings, but multiple scans never showed actual or pending codes in engine, transmission or abs scans. I also tried multiple hard resets and still nothing changed. In fact, the standard approaches to hard resets did not reset things.
Well here is what seemed to work. The best guess was the problem was in a setting in the ECU's memory. I did a hard reset, unplugged the ECU and left it unplugged overnight. This finally seemed to clear any stored settings in the ECU. Next, I drove drove the car for several hours. All but the EVAP monitor switched to ready. In CA, 1999 cars can pass smog without the EVAP ready so long as all the other monitors are ready. My hope is the EVAP will set to ready over the next few days.
While I don't know if this is true, the local indie tells me that some cars have a backup battery to keep the ECU going when the main battery is disconnected. It's acts like the CMOS battery on a computer's memory board. As such, the memory never fully resets. True or not, the 99 XK8 is back on the road legally, The good news is the emissions are near zero. Amazing for a 23 year old car.
Hopes my experience helps anyone facing this issue in the future.
Best
Thom
It's been several months. Problem solved finally. All the monitors except EVAP set to ready and the car passed California smog.
The reason I'm writing is to tell you what finally fixed the issue. I spent months following everyone's suggestions on drive cycles and the CCM and EVAP never set to ready. Over that period, I would see random 'restricted performance; warnings, but multiple scans never showed actual or pending codes in engine, transmission or abs scans. I also tried multiple hard resets and still nothing changed. In fact, the standard approaches to hard resets did not reset things.
Well here is what seemed to work. The best guess was the problem was in a setting in the ECU's memory. I did a hard reset, unplugged the ECU and left it unplugged overnight. This finally seemed to clear any stored settings in the ECU. Next, I drove drove the car for several hours. All but the EVAP monitor switched to ready. In CA, 1999 cars can pass smog without the EVAP ready so long as all the other monitors are ready. My hope is the EVAP will set to ready over the next few days.
While I don't know if this is true, the local indie tells me that some cars have a backup battery to keep the ECU going when the main battery is disconnected. It's acts like the CMOS battery on a computer's memory board. As such, the memory never fully resets. True or not, the 99 XK8 is back on the road legally, The good news is the emissions are near zero. Amazing for a 23 year old car.
Hopes my experience helps anyone facing this issue in the future.
Best
Thom
Last edited by thom4782; Dec 20, 2022 at 10:11 PM.
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