O2 sensor replacement
Senior Member
Joined: Jun 2023
Posts: 671
Likes: 328
From: La Habra
Hey Y2K,
It was in the compartment horizontally, with the plug at the top, but it just wasn't in the slot that is built into the compartment.
I've been finding some posts on here and the jagforum.com site that have information regarding some tests that can be done on the TCM.
I'm seeing some threads saying that ANY fault code will stop the monitors from resetting. Of course I'm also seeing other threads saying that the TCM fault codes shouldn't stop the monitors from resetting. This seems to be my biggest issue. There does not seem to be any real answer. It's just like the "drive cycles" that are supposed to clear the monitors. One source says drive 55 mph for 5 minutes then take your foot off the gas and coast to 20, another says to drive 35 mph for 30 seconds. I'm beginning to think it's all BULLSH*T and it amounts to built in obsolescence on all these newer cars. I mean when I call the Jaguar dealer and their service depart tells me that they do not work on cars this old I'm thinking Jaguar doesn't give a crap about keeping their cars on the road, just buying new ones, which, I would never do. As a certified "Old Fart" I do not understand how a company can build a car that can not be repaired. In my opinion a "monitor" is supposed to tell you something is wrong. If it can't be reset then it's of no use. There is nothing telling me I have a bad O2 sensor, or a bad CAT. At this point if someone offered me a gold plated Jaguar I'd tell them to keep it. I've been on these forums for 6 months trying to find a solution and no one knows how to fix this. I'm either too old, too stupid or too computer illiterate to drive anything with more wire than steel.
It was in the compartment horizontally, with the plug at the top, but it just wasn't in the slot that is built into the compartment.
I've been finding some posts on here and the jagforum.com site that have information regarding some tests that can be done on the TCM.
I'm seeing some threads saying that ANY fault code will stop the monitors from resetting. Of course I'm also seeing other threads saying that the TCM fault codes shouldn't stop the monitors from resetting. This seems to be my biggest issue. There does not seem to be any real answer. It's just like the "drive cycles" that are supposed to clear the monitors. One source says drive 55 mph for 5 minutes then take your foot off the gas and coast to 20, another says to drive 35 mph for 30 seconds. I'm beginning to think it's all BULLSH*T and it amounts to built in obsolescence on all these newer cars. I mean when I call the Jaguar dealer and their service depart tells me that they do not work on cars this old I'm thinking Jaguar doesn't give a crap about keeping their cars on the road, just buying new ones, which, I would never do. As a certified "Old Fart" I do not understand how a company can build a car that can not be repaired. In my opinion a "monitor" is supposed to tell you something is wrong. If it can't be reset then it's of no use. There is nothing telling me I have a bad O2 sensor, or a bad CAT. At this point if someone offered me a gold plated Jaguar I'd tell them to keep it. I've been on these forums for 6 months trying to find a solution and no one knows how to fix this. I'm either too old, too stupid or too computer illiterate to drive anything with more wire than steel.
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Senior Member
Joined: Oct 2024
Posts: 455
Likes: 82
From: Orange County Califorina
I'm going to go out and rerun the fuel trim on the OBD2 again. I haven't done that since the hard reset or replacing the downstream ones.
Do you know what the original equipment Cats looked like? I'm finding lots of cats on ebay. Some look like the ones that are on my car and some are different. On mine the the upstream sensor goes into a port above the cat but the downstream one has the port in the lower part of the cat itself. I'm seeing ones like that but also ones with the downstream sensor in a port that is in a pipe after the cat. This, like everything else Jaguar related, seems to have no simple answer.
Joe
Do you know what the original equipment Cats looked like? I'm finding lots of cats on ebay. Some look like the ones that are on my car and some are different. On mine the the upstream sensor goes into a port above the cat but the downstream one has the port in the lower part of the cat itself. I'm seeing ones like that but also ones with the downstream sensor in a port that is in a pipe after the cat. This, like everything else Jaguar related, seems to have no simple answer.
Joe
Senior Member
Joined: Jun 2023
Posts: 671
Likes: 328
From: La Habra
I'm going to go out and rerun the fuel trim on the OBD2 again. I haven't done that since the hard reset or replacing the downstream ones.
Do you know what the original equipment Cats looked like? I'm finding lots of cats on ebay. Some look like the ones that are on my car and some are different. On mine the the upstream sensor goes into a port above the cat but the downstream one has the port in the lower part of the cat itself. I'm seeing ones like that but also ones with the downstream sensor in a port that is in a pipe after the cat. This, like everything else Jaguar related, seems to have no simple answer.
Joe
Do you know what the original equipment Cats looked like? I'm finding lots of cats on ebay. Some look like the ones that are on my car and some are different. On mine the the upstream sensor goes into a port above the cat but the downstream one has the port in the lower part of the cat itself. I'm seeing ones like that but also ones with the downstream sensor in a port that is in a pipe after the cat. This, like everything else Jaguar related, seems to have no simple answer.
Joe
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