airpump
#2
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#6
ok, starting to make sense now maybe. I've gotten a 0411 fault code and someone here told me i probably need an air pump. Its in a good location to easily replace. Don't want to replace it if i don't need to though. When i start my car, the airpump comes on for a while a couple of times then shuts off. is this normal? Whats the airpumps purpose? To Provide vacuum? This may also contribute to my 0441 fault code. Maybe i also have a vacuum leak. I know this may sound repetitive, but i have more time and patience than money, and with that and you guys help and advice, I can fix almost anything and bypass the dealer
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#9
Jagman,
Not sure of the code I had, but it corresponded to "Insufficient airflow in secondary air injection system" according to the VatoZone scan, then confirmed by Bob on his Jag WDS. Likely similar to what you are experiencing. If so, there is a trouble-shooting tree for it, but most commonly it comes down to the pump. I have been unable to find one <$100. We don't have a smog-check here, I'll just tolerate the light..nice balance to the ABS light...and if I run it low on fuel, I get 3 yellow in a row and half expect quarters to start spitting out of the air louvers!
Anyway, Bob cleared mine and it remained dormant for about two weeks. "Chk-engine" on again, and I assume it is the same thing, though haven't had it read, yet. Curiously, even though the system-function is for cold start only(pumps air into the exhaust to hasten the cat conv temp rise) both occurrences of my check-eng have illuminated on hot-starts, with eng coolant temp in operating range.
I believe the "gouge" on these is that it is a recurrent failure. You can fix it with a new pump, but, like Ahhnald in the "Terminator"...it'll be back!
Not sure of the code I had, but it corresponded to "Insufficient airflow in secondary air injection system" according to the VatoZone scan, then confirmed by Bob on his Jag WDS. Likely similar to what you are experiencing. If so, there is a trouble-shooting tree for it, but most commonly it comes down to the pump. I have been unable to find one <$100. We don't have a smog-check here, I'll just tolerate the light..nice balance to the ABS light...and if I run it low on fuel, I get 3 yellow in a row and half expect quarters to start spitting out of the air louvers!
Anyway, Bob cleared mine and it remained dormant for about two weeks. "Chk-engine" on again, and I assume it is the same thing, though haven't had it read, yet. Curiously, even though the system-function is for cold start only(pumps air into the exhaust to hasten the cat conv temp rise) both occurrences of my check-eng have illuminated on hot-starts, with eng coolant temp in operating range.
I believe the "gouge" on these is that it is a recurrent failure. You can fix it with a new pump, but, like Ahhnald in the "Terminator"...it'll be back!
#10
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#13
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Mine was flat out dead. When working they make an audible "zing" noise right after the engine starts. In my case it had seized up and the high resistance blew the fuse. A bench test confirmed that it was no bueno por nada.
The OBD system somehow decides if the pump isn't working or isn't working well enough. I'm not sure how this determination is made.
Cheers
DD
The OBD system somehow decides if the pump isn't working or isn't working well enough. I'm not sure how this determination is made.
Cheers
DD
#15
For me, it is ok
Bob, thanks for the TSB's. You are a true Texas treasure!
So I'm no longer puzzled why I get the code on hot-starts, since both pump and BIT run on every start.
Doug, if you figure out how you avoided the code all that time....I'd be tempted to pay for the info if the process can be duplicated...but as I said...content to live with the light for now.....at least until I find the time and the courage to "bend the livin' s&^% out of the brake lines" and pull the ABS module and cut it open....
So I'm no longer puzzled why I get the code on hot-starts, since both pump and BIT run on every start.
Doug, if you figure out how you avoided the code all that time....I'd be tempted to pay for the info if the process can be duplicated...but as I said...content to live with the light for now.....at least until I find the time and the courage to "bend the livin' s&^% out of the brake lines" and pull the ABS module and cut it open....
#16
I just noticed, does the airpump suppose to come on at every cold start? I used to hear mine but now i haven"t heard mine in a while. Maybe this explains my 0411 error code. It was working before, but not good enough because it was getting ready to sop working anyway. Brutal says this code means you need a new airpump. That will be an easy fix if so.
#17
Every start, cold or otherwise...it is supposed to exercise itself.
It only exists for cold starts....but I guess some brilliant engineer at Jaguar or maybe at Ford, decided it should run and OBD2 should perform BIT (built-in Test) on every start, regardless of coolant temp.
For me, an even easier fix: $27.50 OBD2 Scanner from Amazon that confirms I have (2) P0411's then I erase 'em.
Thus far, I got the light (and 2 codes) about a week and a half after Motorcarman cleared them for me, then again maybe a week after I cleared those. Still off for now. All three times I've got the light, it has illuminated on start after a very short shutdown, FWIW. 1) Refuel, 2) 3 min to duck into grocery for a sale flyer and 3) reposition from driveway to shop at home after cargo unload. Motor does "zing" on startup, but I haven't pulled the outlet hose and tried holding my hand over it like described in the bulletin yet.
It only exists for cold starts....but I guess some brilliant engineer at Jaguar or maybe at Ford, decided it should run and OBD2 should perform BIT (built-in Test) on every start, regardless of coolant temp.
For me, an even easier fix: $27.50 OBD2 Scanner from Amazon that confirms I have (2) P0411's then I erase 'em.
Thus far, I got the light (and 2 codes) about a week and a half after Motorcarman cleared them for me, then again maybe a week after I cleared those. Still off for now. All three times I've got the light, it has illuminated on start after a very short shutdown, FWIW. 1) Refuel, 2) 3 min to duck into grocery for a sale flyer and 3) reposition from driveway to shop at home after cargo unload. Motor does "zing" on startup, but I haven't pulled the outlet hose and tried holding my hand over it like described in the bulletin yet.
#18
I'm almost certain i don't hear my airpump on startup now. Must be dead now. I also don't get the o411 code(check engine light) anymore. Is it that the airpump isn't working therefor not sending an insufficient airflow code? Do i even need the airpump? I don't mind buying a new one if so. Easy to replace
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