Got this for the first time today after a 90 mile fast run on a hot day. No problems during the drive (in fact was running very sweetly) but engine fault light came on when I started again after 10 minutes. My UltraGauge said P1647 error code. I cleared the code on the UG and restarted a few times and the fault light went off and stayed off for the 90 mile journey home with no more error codes on the UG. Again ran perfectly.

I see from here and elsewhere P1647 is bank 2 upstream oxygen sensor. Also noted NOT to buy a so called universal replacement and that getting the old one out is a bit of a PITA. Even though the fault cleared I'm minded to get a replacement incase it reappears.

Please could someone advise the correct part number I need and clarify the exact location of the Bank 2 sensor?

Thanks
Steve

 

I can't answer your question, but when I changed the coolant and thermostat on my XKR, I noticed it was then running a little cooler than before. If you haven't done so recently that might be an idea if the hot weather is set to continue in the UK.

 

 

 

1. it's not running perfectly - thus the code!!
2. as your laws require, it's a 2-trip code so by clearing it ... well, the 2-trip explains it...

 

Are the laws different in West Yorkshire to Yorkshire? Unless by West Yorkshire he actually means Lancashire?

 

Well yes, a truism I suppose!!

What I was trying to convey (obviously poorly) is that there was no subjective sign of a problem. Engine was running smooth with no lumpiness at idle - didn't check the fuel consumption figures.

 

Aaaaagh! Heresy!!

 

Sorry - I did mean "our".

It's worth checking the circuit (but it's nearly always the sensor that's burnt out due to running at 600-900C for a long time).

It'll probably be fine after a new sensor so long as it's the right kind (and the right one is swapped).

No need to swap them as a pair but apart from the cost it can't really hurt. Keep the good one as a spare, even though it's well used.

 

 

 

 

Did this job only last week,had a p1646 code so replaced both upstream sensors (not cheap ) and a pain to replace ,now I get code p1646 and p1647,car runs like a dream so go figure? I also replaced my thermostat and housing a month ago,so at the moment I am just trying to figure out my next step towards trying to clear these codes,may I also add that the car went in for a full mot since the replacement and pass the emissions no problem.

 

I feel your pain.
You are a braver man than me. After my lamentable failure to shift the Eunos sensor I know I'd screw it up on the Jag if I tried so respect to you for succeeding in replacing them.
I just hope that my code clears after the 2 new sensors are fitted on Monday. They are the pukka Jag ones so should be OK but I've found that Jag life often isn't so simple ........

 

The original owner of your car paid £75,000 for it. 17 years later £200 in parts plus labour to keep it going is a bargain in comparison.