[x300] Trouble code 0430

About twice a year I get this trouble code: P0430. It relates
to:Catalyst System Low Efficiency Bank 2. I am not certain if this
is referring to a bad O2 sensor or what. In the past I have just
cleared the code and forgot about it. Now, at 120K I am thinking I
should get it dealt with.

There are much smarter people than I out there. ( You know who you
be) Any thoughts on this ?–
David Herzstein / 96x300 120K
Albuquerque,New Mexico, United States
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I get that same code once in a while too in my '96 XJ6 VDP with 65K on
it. I just clear it and keep going. When it comes up the car doesn’t
seem to drive any differently. I will be interested in hearing what
it might be?

Bob
Long Beach, CA> About twice a year I get this trouble code: P0430. It relates

to:Catalyst System Low Efficiency Bank 2.

In reply to a message from BobboSD@Gmail.com sent Tue 10 Apr 2007:

Bob, exactly. No running problems and great fuel econ of about 24
on the freeway. We both may gain some insight from others out there
who know about this code.–
The original message included these comments:

I get that same code once in a while too in my '96 XJ6 VDP with 65K on
it. I just clear it and keep going. When it comes up the car doesn’t
seem to drive any differently. I will be interested in hearing what
it might be?


David Herzstein / 96x300 120K
Albuquerque,New Mexico, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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As soon as I get my P0430 sorted…haven’t made much effort yet…I’ll let
everyone know.

Doug Dwyer
Longview Washington USA
1995 XJRFrom: “JozJag” davidsherzstein@comcast.net

About twice a year I get this trouble code: P0430. It relates
to:Catalyst System Low Efficiency Bank 2. I am not certain if this
is referring to a bad O2 sensor or what. In the past I have just
cleared the code and forgot about it. Now, at 120K I am thinking I
should get it dealt with.

In reply to a message from Doug Dwyer sent Tue 10 Apr 2007:

I had P0430 come up after completing a drive cycle at low speed on
my XJ6 last fall. I had it cleared but the code reappeared soon
after and would terminate on its own only to reappear several days
later. The fix for me was replacing the front cat.

Sunny–
Sunny Garofalo, '97 XJ6, '95 XJR
Northridge, CA, United States
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That’s sorta what I’m afraid of, as it sounds expensive :slight_smile:

I’ve been looking at the trouble tree for P0430 and, quite interestingly,
since it relates to cat converter efficiency, cat converter replacement is
not suggested at all. Weird, huh ? Check for inlet or exhaust leaks, a
number of wiring checks and then, if all good, replace upstream sensors.

Speaking of wiring checks I’ve ID’d all the wires and connectors except
“RS006/008”. Any help ?

Cheers
Doug Dwyer
Longview Washington USA
1995 XJRFrom: “JaguarXJ6” sunny@ferraridrivingclub.com

I had P0430 come up after completing a drive cycle at low speed on
my XJ6 last fall. I had it cleared but the code reappeared soon
after and would terminate on its own only to reappear several days
later. The fix for me was replacing the front cat.

In a slightly different area, the ROM mentions the following possible causes
of P0430

Catalyst fault- poor oxygen storage
Severe exhaust leak A, B
Low response upstream oxygen sensor A, B
Additional capacitance (upstream oxygen sensor) - harness fault A, B
ECM filter wrong - oxygen sensor A, B
Wrong load/speed sites- inlet air leak or air meter fault

Doug Dwyer
Longview Washington USA
1995 XJRFrom: “Doug Dwyer” <@Doug_Dwyer4>

That’s sorta what I’m afraid of, as it sounds expensive :slight_smile:

I’ve been looking at the trouble tree for P0430 and, quite interestingly,
since it relates to cat converter efficiency, cat converter replacement is
not suggested at all. Weird, huh ? Check for inlet or exhaust leaks, a
number of wiring checks and then, if all good, replace upstream sensors.

Speaking of wiring checks I’ve ID’d all the wires and connectors except
“RS006/008”. Any help ?

My friend’s X300 also had a code set for, among other things,
“exhaust leak”. Since the X300s are notorious for having an exhaust
manifold crack in either one or both of them, I immediately took off
the “beauty plate” and found the offending crack. I found the
suggestion in the online book on Jag lovers to try exhaust sealer
paste as a temporary expediant, tried it, cleared the code and,
mirabile dictu, it worked!

It was a temporary expedient as I had to find and replace the
manifold from a junkie later on, but it got him past his inspection
and held for a couple of months.

Best, Brian

“…Severe exhaust leak A, B
Low response upstream oxygen sensor A, B …”

I want to swap the wheels from our 1998 XJ8 to our 1995 XJ12 and visa versa.
Possible?

-Chris

In reply to a message from Chris M sent Tue 10 Apr 2007:

The 98 wheels will not fit over the larger 95 XJ12 front hubs, they
should fit the rears though. Going the other way should work okay.–
The original message included these comments:

I want to swap the wheels from our 1998 XJ8 to our 1995 XJ12 and visa versa.


Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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Thanx. Question though, I gather that there will be a gap between the hub
and wheel if I put the 1995 XJ12 wheels on the 1998 XJ8. That won’t be a
problem? Jaguar wheels are not hub centric, but the lugnuts center them on
the hub?

-Chris> -----Original Message-----

From: owner-x300@jag-lovers.org [mailto:owner-x300@jag-lovers.org] On
Behalf Of Brian Caro
Sent: Tuesday, April 10, 2007 3:58 PM
To: x300@jag-lovers.org
Subject: Re: [x300] x300 and x308 wheel swap?

In reply to a message from Chris M sent Tue 10 Apr 2007:

The 98 wheels will not fit over the larger 95 XJ12 front hubs, they
should fit the rears though. Going the other way should work okay.

The original message included these comments:

I want to swap the wheels from our 1998 XJ8 to our 1995 XJ12 and visa
versa.


Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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In reply to a message from Chris M sent Thu 12 Apr 2007:

I hadn’t thought about it. Look at a lugnut and if it is conical
shaped, the nuts center the wheel. If my memory is correct, the
outside of the hubs is not machined, I doubt that the hub centers
the wheel.–
Brian Caro 96XJ6 4.0 63E-TypeS1FHC
Newport News, VA, United States
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In reply to a message from Brian Caro sent Thu 12 Apr 2007:

I agree with Brian here. I have heard all this ‘‘Hub Centric’’
stuff, special rings etc. for a while and on the Jags I have
onwed,all have used shoulder type lug nuts, it would be impossible
for them to be ‘‘Hub Centric’’ .–
The original message included these comments:

I hadn’t thought about it. Look at a lugnut and if it is conical
shaped, the nuts center the wheel. If my memory is correct, the
outside of the hubs is not machined, I doubt that the hub centers
the wheel.


uncle
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