Jaguar Forums - Jaguar Enthusiasts Forum - Cat, O2 sensor cleaner recomendations?

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Cat, O2 sensor cleaner recomendations?

I have seen several products for putting in the fuel tank that clean the cats and O2 sensors, any recommendations as to which is the best? Mr. Gasket, Solder One, etc??

I don't think any of them work, it's snake oil.

Since you'll probably be diving into this endeavor.... https://www.jaguarforums.com/forum/x...cement-195018/

Excellent! Thanks man

After reading over the tutorial you supplied, I see the codes are different than what my car is throwing. Mine are
P0171 and P0174...lean left and right banks...?

Quote:

Originally Posted by 3timejag (Post 2039476)

After reading over the tutorial you supplied, I see the codes are different than what my car is throwing. Mine are

P0171 and P0174...lean left and right banks...?

Since you have the "combustion too lean" on both banks at the same time, the problem is probably in one of the engine components that is common for both banks.

The generic code list states:

Damaged, split, perforated, dislodged, or hardened vacuum lines and/or hoses
Splits, tears, perforations, or other damage in the inlet ducting
Defective or stuck PCV valve
Damaged oil filler cap on some applications
Defective vacuum check valves or other vacuum operated components

The Jaguar code list states:
Engine misfire
Air intake leak between MAFS and throttle
Fuel filter, system blockage Fuel injector blockage
Fuel pressure regulator failure (low fuel pressure)
Low fuel pump output
HO2S harness wiring condition fault
Exhaust leak (before catalyst)
ECM receiving incorrect signal from one or more of the following components: ECTS, MAFS, IATS, TPS

That makes sense. When my mechanic replaced the plastic thermostat housing with an aluminum one a while back, he accidentally broke the little hose coupling that goes into the engine close to that area. He “fixed” it with some silicone, or something like that, I’ll bet that has failed. Make sense?

Quote:

Originally Posted by 3timejag (Post 2039507)

If there is vacuum leak there, it can certainly cause problem. Whilst checking/fixing the hose you mentioned (full load engine breather), check that the small orifice in the hose connector/adapter on the cam cover is not blocked by crude (poke through with a thin rod).

Bingo! Lifted the left engine cover, and there it was...broken full load breather hose! Repaired it, and all is good. Thanks for “reminding “ me of that previous repair...
Still have a P1000 code I can’t figure out though.
Many thanks to all for the help and replies!
Scott

The P1000 was not likely to change to P1111 with a fault like that but now has a chance.