Hello I’m new to the forms and I have a question. I have a 2015 F type R with 29,200 miles on it . She has had her O2 sensors replaced four times and two wiring harness to try to stop the O2 sensor problem, her check engine light is on again. Computer diagnostic is indicating that bank one sensor 2 has a delayed response and needs to be replaced. this will be the fifth time ! Needless to say it’s getting a little old she’s out of warranty now. Do I have any recourse or do I just need to keep replacing O2 sensors or get rid of the car .
Thank you!

 

There’s a TSB related to O2 sensor calibration. I had two O2 sensors replaced un the first couple of years but none since.

 

+1. Affects MY 14-15. Requires a software update, but you run the risk that the overrun fireworks get reduced if they also apply the sound reduction update.

 

I saw that once and cleared it and it ever came back. What about adding a spacer? Are you in an emissions State?

 

I do not know what a spacer is , The car has only been to jaguar dealerships to be worked on . The last time it was worked on and they replaced several wiring harness is they said it would end the problem but it didn’t . I’m right back to O2 sensors being bad .

 

I’m sorry I have no idea what a TSB is . Will it hurt the car to drive it with the 02 sensor being bad ?

 

A TSB is a Technical Service Bulletin. These are published by manufacturers to aid in tracking down issues in the least amount of time.

Sometimes the dealer doesn't look for updated information (although it SHOULD be right there, on the JLR TOPiX manufacturer's site). It's possible that new 'cures' are available since your car was last in for service.

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"Hurt to Drive"? You might get poor running (if the data from the sensors is erroneous, the engine control will set parameters that are 'wrong' for proper operation). That COULD lead to a damaged catalytic converter. Then you might be in an endless loop...

It's also possible that 'upstream' conditions (bad sparkplugs or injectors) are leading to the suspicion that the O2s are bad. There are many issues that can cause O2 failure or issues. Can't pinpoint that stuff over the internet...

 

Sort of a universal fix to O2 sensor CELs is to add a spacer to the O2 sensor mounting point. It has no impact other than not passing emissions if the sensor CEL is valid, for example if you install racing Cats or Catless downpipes which should trigger a CEL. There are a lot of youtube videos showing how. Basically you add a spark plug extender to move the sensor out of the exhaust stream. Super cheap and easy, might be worth a shot. There are still ways around emissions if you are in an emissions state, or you could keep a set of new sensors just for emissions tests and run fouled sensors without triggering a CEL the rest of the time

 

Thank you!!

 

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Stillill,
Sorry to hear of your problems and I look forward to hearing what is the solution.

I'm preparing to replace both exhaust manifolds and the downpipe on my 1995 XJS AJ16 and would like to ask a few related questions. Do you remember the MagnaFlow part number that you bought, and how happy are you with the "direct replacement" fit? I have read that MagnaFlow owns BRExhaust and that BRExhaust is a quality line, and almost $300 cheaper than the Jag specialty stores'. BRExhaust's p/n 099-4028 appears to be the same as a MagnaFlow's p/n 52085 (MagnaFlow's website crosses the Jag p/n of NBC6711BA to this p/n, but then states that this part is unavailable, so your purchase makes me wonder if I'm just not looking in the right spot. My downpipe is the original with "NBC6711BA" stamped on the side, and also has the slip joint, not the spherical connector.

I'm here in upstate NY and the 1995 is exempt from the more stringent emission requirement.

Your input will be greatly appreciated and I hope you have resolved your issues by now.

Scott

 

Not mentioned yet is the fact that Jaguar has extended the warranty retroactively on 02 sensors to 15 years.