XJ6 won't pass smog

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06-23-2007, 09:02 PM

carbonmr2

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XJ6 won't pass smog

Hello All,
I'm new to the forum, though I've been a jag owner since 2002. I own a 95 Topaz XJ6 that isn't passing smog here in California but only because the check engine light is on. How can I turn this light off? Any Help would be appreicated. Thank you.

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06-23-2007, 09:42 PM

93xj6

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RE: XJ6 won't pass smog

My guess is the engine needs to be fixed.

IF it says check engine there's no one way to turn it off, you have to take it to a mechanic, or I suggest a dealer and get a diagnostic test. They will find out what's wrong with the engine fix it and the light will turn off.

Or you could take out the circuit for the warning lights, but that might be a bad idea...

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06-24-2007, 12:28 PM

carbonmr2

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RE: XJ6 won't pass smog

well, i know that the issue is that one of the catalytic converters has gone out, it still passes smog... at least it would if the engine light weren't on. My registration is about to expire and I really need to figure out a solution. Any help that could be provided would be greatly appreciated. Thanks all

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06-25-2007, 12:38 PM

ken@britishparts.com

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RE: XJ6 won't pass smog

You will need to change the cat and possibly an 02 sensor.

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05-20-2008, 01:30 AM

cthulhu

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RE: XJ6 won't pass smog

do smog pumps tend to fail? I have a 95 xj6 with 67Kthe check engine light came on and gave code p0411 last summer periodically and then quit. Now that it has gottenwarm again.. check engine light is on again. this time staying on.

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05-21-2008, 10:17 PM

cthulhu

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RE: XJ6 won't pass smog

anyone know how to bench test an x300 smog pump?

i tested the connector and got 14V..

then I applied 14v to the outer pins..pump spun like crazy for about 10 seconds now it wont spin at all.

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05-22-2008, 07:15 PM

ibjags

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RE: XJ6 won't pass smog

P0411 is air pump fault
replace air pump upgrade fuse from 25A to 30A
real simple job
three 8 mm bolts
2 hose clamps on pump
fuselocationfor air pump is identified under r/h engine compartment lid
worst case scenario would be air pump check valve fault
but not too likely

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05-23-2008, 12:02 AM

JagtechOhio

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RE: XJ6 won't pass smog

ib,

wouldn't an intermittant air pump clutch relay, at the right headlamp panel, cause the same code?

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05-29-2008, 08:20 PM

ibjags

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RE: XJ6 won't pass smog

SECONDARY AIR INJECTION SYSTEM - P0411Symptom Chart

CONDITION
POSSIBLE SOURCE
ACTION

Fault code P0411
Insufficient Air Flow
Switch ignition off

Check pump and relay harness and connector condition / integrity, if faulty rectify and proceed to pinpoint test A9

Check AIR pipe for blockage or leakage, if faulty rectify and proceed to pinpoint test A9

If fault not found, disconnect AIR harness and relay and proceed to pinpoint test A1

Pinpoint Tests

TEST STEP
RESULT
ACTION

A1
Check harness continuity PI 061/013 to PI 146/003
OK
Proceed to A2

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A2
Check harness continuity PI 146/005 to PI 115/001
OK
Proceed to A3

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A3
Check harness continuity PI 146/005 to PI 115/002
OK
Proceed to A4

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A4
Check harness continuity PI 115/003 to ground
OK
Proceed to A5

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A5
Check harness continuity PI 001/004 to PI 146/002
OK
Proceed to A6

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A6
Check harness continuity PI 115/003 to PI 104/007
OK
Proceed to A7

Open circuit
Locate and rectify wiring fault, re-connect harness and proceed to A9

A7
Check AIR relay operation
OK
Proceed to A8

Faulty
Renew relay, re-connect harness and proceed to A9

A8
Check AIR pump is permanently off
No
Proceed to A9

Yes
Renew pump, re-connect harness and proceed to A9

A9
Clear fault and perform service drive cycle to verify fault cleared
OK
Stop

Fault still present
Proceed to A10

A10
Return to Symptom Chart and repeat diagnostic procedure
OK
Stop

95 to 97 models with P0411 for me personally have usually been a faulty air pump and or burned air pump fuse due to pump drawing to any amps
with new pump installed the25 amp fuse is upgraded to a 30 amp also
hope this helps

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06-13-2008, 07:11 PM

clubmia85

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RE: XJ6 won't pass smog

so as far as this goes for the air pump, all that is needed to be done to fix the problem is to upgrade from the 25amp fuse to the 30?

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#11

06-14-2008, 12:54 AM

JagtechOhio

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RE: XJ6 won't pass smog

If the 25 amp fuse is blown, the information that ibjags was kind enough to provide suggest that simply installing a 30 amp fuse might work. If the fuse is not blown, you will have to diagnose the system with the information provided. Bad fuse OR bad relay OR bad wiring connection OR bad pump

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#12

06-14-2008, 09:16 PM

ibjags

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RE: XJ6 won't pass smog

Correct

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#13

06-14-2008, 10:03 PM

JagtechOhio

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RE: XJ6 won't pass smog

ibjags,

Does that mean I passed my smog test?

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#14

06-14-2008, 10:09 PM

ibjags

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RE: XJ6 won't pass smog

lol

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#15

08-22-2008, 09:57 PM

rsmartin

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RE: XJ6 won't pass smog

my 95 topaz xj6 w/ 196K has failed emission test too, BUT my check engine light is not on. it fails the CO test by 0.10, it reads 1.30 and limit is 1.20

actually seems to get worse if engine is revved up. i replaced all 4 o2 sensors about 4 -5 years ago. anyway to tell if my o2 sensors are bad without paying for engine scan?

or should i be looking at another culprit? spark plugs were changed 2 years ago and i just replaced air filter. it's only been driven about 3-5K miles in the last 3 years

thanks.

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#16

08-23-2008, 07:16 AM

oldmots

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RE: XJ6 won't pass smog

If you can plug in an electrical cord, you can buy a code reader at a local auto parts store and follow the instructions to read and recordthe OBDIIcode and then erase it. If it comes back within a week, it may need repair. You may need a code decoder list. This is available on Alldata.com with a subscription. I have an X300 and having a code reader has saved me thousands of dollars in unneeded repairs from erronious codes. It would be the best tool you ever bought. I have not heard of many cases where the catalyst was really bad, it's often the O2 sensors getting weak andgiving wrong signals to the ECUthat the catalysts are bad. If a downstream sensor gets lazy, it can tell the computer that the catalyst is not cleaning well when it is not true.I would be suspicious until I read the codes myself and this is because I was a tech at one time!
Brian C.

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