98 f150 code p1537 1538
#1
98 f150 code p1537 1538
I'm getting codes p1537 and p1538
I bought a actron tool 9575 trying to see when the codes are setting
When i reset the codes it shows 6 monitors not ready within 2 miles only 2 not ready
If i restart the engine a second time the codes reappear but engine light still off .
What monitor by name is tripping the code?
I was told two of 3 monitor can reset before light comes on.
What are the Monitors?
Does restarting engine cause the codes to reset?
Thanks
I bought a actron tool 9575 trying to see when the codes are setting
When i reset the codes it shows 6 monitors not ready within 2 miles only 2 not ready
If i restart the engine a second time the codes reappear but engine light still off .
What monitor by name is tripping the code?
I was told two of 3 monitor can reset before light comes on.
What are the Monitors?
Does restarting engine cause the codes to reset?
Thanks
#2
Your in a bit of confusion and miss information about what is happening.
1. the monitors will always reset to the diagnostic mode whenever you clear any code, or power down the PCM by removing the battery cable.
2. it takes several drive cycle times for all the monitors to be reset after all the tests are complete and pass especially the EVAP system.
There are 7 monitors.
3. the codes tell me your motor is a v6 and has both banks' intake runner controls stuck open. They don't usually interfere with the monitors and testing. This is one of your 'corn-fusions'. hi hi.
Your just losing some low rpm power because the runners are not closed.
Look at linkage and vacum hoses etc for the issue involving both sides.
Good luck.
1. the monitors will always reset to the diagnostic mode whenever you clear any code, or power down the PCM by removing the battery cable.
2. it takes several drive cycle times for all the monitors to be reset after all the tests are complete and pass especially the EVAP system.
There are 7 monitors.
3. the codes tell me your motor is a v6 and has both banks' intake runner controls stuck open. They don't usually interfere with the monitors and testing. This is one of your 'corn-fusions'. hi hi.
Your just losing some low rpm power because the runners are not closed.
Look at linkage and vacum hoses etc for the issue involving both sides.
Good luck.
#3
#4
------last monitor that can reset before the light comes on!
.......does not work that way.
...In the program, there is an order of how things are done dictated by an 'executive' control program that decides this.
...The monitors are a set of 7 seperate defined sets of tests that are done when 'triggered' by either a 'clear', power down or a program change event from external.
..This automaticly sets a code P1000 that starts it all going.
..This code 1000 you may not see, depending on the reader or scanner used because it is not a fault code per sey but only an indicator that 1 or more of the 7 the monitors are not reset.
.................................................. .................................................. ...............
... does the number of starts cause the engine light to come back on if a code is still present?
....Answer is yes for certain faults and no for others.
....Example of delayed code is the P0401 code involving the EGR system.
....This test is covered by one monitor above but seperate test skeds as well as full time monitoring is done. For this code, 2 drive cycles are required after a clear is done, or a fault has been repaired, for the PCM to test and clear the 'code' it'self. Reason is in the hardware operation there is moisture normally present that could freeze in cold temps and make the test fail by blockage until the engine bay heats up, so the test is run on 2 successive drive cycles to see if the failure is still there before setting a code and lighting the lamp.
....An example of immediate detection of a fault seperate from the monitors would be a camshaft sensor fault that would render the motor un usable.
.....So you can see there are longer term tests that go on for the EPA mandated emission controls (the 7 monitors) and immediate detections of hardware failures.
....There are delayed operational result tests due to how hardware works and involves a time or drive cycle requirements.
....And there are many individual fault monitors for engine control hardware that are seperate from the 2 just above.
The total control 'sheme' is done to'
1. satisfy the EPA emissions requirements full time.
2. to keep track for engine operation full time.
3. not to disable the vehichle along the road for non serious faults that would not hurt the motor in the short term.
4. not to alarm the operator with a CEL lamps indications every time something of short duration is detected and cause repair shop visits.
To accomplish this, the PCM has 'fault counting' that has limits applied to each before a fault is determined, then lights the CEL to be sure it is a hard fault.
.
Without in depth knowledge of the FORD system for each PCM program family version, your answers are hard to present so you can fully understand it.
Even shops often don't know for all the versions and makes they work on.
Most shops fall into working almost purely on a code basis and not think to deeply about what goes on in any depth. This makes some of their work difficult and costly by causing excessive part replacement just to 'see' if it fixes the problems.
This is like taking a shallow dip in a very deep pool.
Now that I have confused you,
Good luck..
.......does not work that way.
...In the program, there is an order of how things are done dictated by an 'executive' control program that decides this.
...The monitors are a set of 7 seperate defined sets of tests that are done when 'triggered' by either a 'clear', power down or a program change event from external.
..This automaticly sets a code P1000 that starts it all going.
..This code 1000 you may not see, depending on the reader or scanner used because it is not a fault code per sey but only an indicator that 1 or more of the 7 the monitors are not reset.
.................................................. .................................................. ...............
... does the number of starts cause the engine light to come back on if a code is still present?
....Answer is yes for certain faults and no for others.
....Example of delayed code is the P0401 code involving the EGR system.
....This test is covered by one monitor above but seperate test skeds as well as full time monitoring is done. For this code, 2 drive cycles are required after a clear is done, or a fault has been repaired, for the PCM to test and clear the 'code' it'self. Reason is in the hardware operation there is moisture normally present that could freeze in cold temps and make the test fail by blockage until the engine bay heats up, so the test is run on 2 successive drive cycles to see if the failure is still there before setting a code and lighting the lamp.
....An example of immediate detection of a fault seperate from the monitors would be a camshaft sensor fault that would render the motor un usable.
.....So you can see there are longer term tests that go on for the EPA mandated emission controls (the 7 monitors) and immediate detections of hardware failures.
....There are delayed operational result tests due to how hardware works and involves a time or drive cycle requirements.
....And there are many individual fault monitors for engine control hardware that are seperate from the 2 just above.
The total control 'sheme' is done to'
1. satisfy the EPA emissions requirements full time.
2. to keep track for engine operation full time.
3. not to disable the vehichle along the road for non serious faults that would not hurt the motor in the short term.
4. not to alarm the operator with a CEL lamps indications every time something of short duration is detected and cause repair shop visits.
To accomplish this, the PCM has 'fault counting' that has limits applied to each before a fault is determined, then lights the CEL to be sure it is a hard fault.
.
Without in depth knowledge of the FORD system for each PCM program family version, your answers are hard to present so you can fully understand it.
Even shops often don't know for all the versions and makes they work on.
Most shops fall into working almost purely on a code basis and not think to deeply about what goes on in any depth. This makes some of their work difficult and costly by causing excessive part replacement just to 'see' if it fixes the problems.
This is like taking a shallow dip in a very deep pool.
Now that I have confused you,
Good luck..
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