where is the airpump located?

 

For the air injection system, right?

Right side of engine, front, mounted high up. Has a 3 wire connection

Cheers
DD

 

Mine's in the same relative position (frt of engine, high)....only on the left...

 

Ooooops....I'm thinking in "XJR" terms and forgot that the standard cars might be different


Sorry.

DD

 

thanks

 

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

 

It only works for a minute or two after a cold start to injection air into the exhaust. Sounds like yours is working but perhaps not well enough?

I'll find the trouble tree for that code and post back

Cheers
DD

 

thanks doug. One of the ceertified techs on here said i might need the airpump. I also get the 0441 code.

 

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!

 

aholbro,
I think it is a '2 trip' fault meaning that the fault will illuminate the MIL after 2 failures.
Here are the old TSBs I found for this fault.

bob gauff

 

Straying a bit......

I had a pump fail and therefore wasn't surprised at getting a P0411. I cleared the code and drove the car for months before replacing the pump.

What's odd is that the code never came back during that period that I was driving with a dead AIR pump.

Cheers
DD

 

did your pump still come on when starting the car. how do you know when it fails? does it come on but doesn't work sufficiently?

 

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

 

mine does make that audible zing. since i'm getting the 0411 fault, maybe mine isn't working quite well enough. maybe worth replacing, huh.

 

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....

 

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.

 

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.

 

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