When I bought my car 2 yrs ago it had fault code FF 67 on it and we swapped
the air injection relay with the horn relay; the fault went away and the
horn worked too. Fault FF 67 came back again last night.
Question :- Is this a common fault to come up and if I reset it will it go
away for another 2 years ?
DTC 67 is a fault of the secondary air injection system. [air]
What is the best method of resetting the fault code ?
Barry Ewen
1994 V12 6.0L XJS convertible.
Windsor, OntarioSubject: Fault code 67 1994 6.0L
Barry;
You may have just opened Pandora’s Box. My '94 6.0 started having FF67 set
a couple of months ago. I read up on it in the ROM, which tells me just enough
to understand a dozen things that may cause the problem. However, there is
one ambiguous sentence that is a large gray area, so I took it to my local
dealer after talking to the Lead Technician on the phone. The simple things I
could check my self I did. I determined the Air was coming on and apparently in
the right (as printed) sequences. The tech spent an hour verifying this on the
JDS, and called Mawah. Two days later they faxed a “Decision Chart” and a
possible problem/solution. It seems the PMCF on all the 6.0’s might have come
from the factory with the PROM set too sensitive. During any of the secondary
air functions the PROM is looking for a certain voltage from both O2 Sensors.
If it doesn’t see a magnitude of this signal, it sets FF67. And that is all it
does. It doesn’t go open loop or any other deregulating function. The bottom
line is, the dealer gave me the “Decision Chart” and said I really didn’t want
to pay him $78.00 an hour to verify 3 pages of decision charts. He also gave me
a mail for service procedure to send the PMCF to Delphi Diesel Systems for
testing and installation of a less sensitive PROM. To date I haven’t either
completed the Chart or contacted Delphi. The JAGUAR NA procedure when the cars
were under warranty, was to have the dealer ship the PMCF to Mahwah, who then
sent it to Delphi and it was returned to the dealer COD for
work/parts/shipping. I tried contacting Walt Peterman who used to accommodate
J-L listers with repairs to ECU’s but the J-L address both Kirby and I have is
not in service. For the time being, I am resigned to ignoring the FF-67 and
dumping the code each time I won’t be using the car for a while. There is no
way to disable the PMCF signal without disabling future serious codes that you
might want to be notified of.
Additionally for the preponderance of J-L listers with 5.3’s, your
secondary air system is not like the 6.0’s so suggestions like do away with the
system with an idler pulley is not an option, nor is FF67 a code in your
system.
Barry, you can contact me off line for further information on Delphi.
Cheers;
charlie
Florida
Barry Ewen wrote:> Subject: Fault code 67 1994 6.0L
When I bought my car 2 yrs ago it had fault code FF 67 on it and we swapped
the air injection relay with the horn relay; the fault went away and the
horn worked too. Fault FF 67 came back again last night.
Question :- Is this a common fault to come up and if I reset it will it go
away for another 2 years ?
DTC 67 is a fault of the secondary air injection system. [air]
What is the best method of resetting the fault code ?
Barry Ewen
1994 V12 6.0L XJS convertible.
Windsor, Ontario
I don’t know if the 94 6.0L has the same method as my 94 4.0L, but here it
is.
Behind the heat vent trim panel, on the right side of the center console
(you have to flip the passenger side under-dash panel down to access it)
there is a yellow wire with a purple connector. Short the conductor to
ground for 3 seconds using a piece of wire, and the code will reset.
To prevent it from happening again, you may want to replace the blue
relay(s) with the updated black ones. You should at least pull ALL your
underhood relays, spray the sockets with electrical contact cleaner, and
buff the grunge off of the relay contacts with an emery board.
I’ll but they’re covered in grunge and corrosion.
Gary
94 4.0L Conv.
San Jose, CA
----Original Message Follows----
What is the best method of resetting the fault code ?
Barry Ewen
1994 V12 6.0L XJS convertible.
Windsor, Ontario_________________________________________________________________
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My car used to get the air mass fault every time my wife took it through
the car wash. A Jag mechanic told me that the sensor can get wet,
causing the fault. The solution is to disconnect the battery, wait 5
seconds, and then reconnect the battery. No more fault.