Code p1646
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Graham11, I would like to be of help to you but I have ran into a snag.
First I have no idea what vehicle you are working on. You can go to the USER CP at the top of the page and add that info to your signature and it will always appear in your posts.
Second problem code P1646 if you have an early model XKR has nothing to do with O2 sensors. I have attached a copy of the DTC definition for that code.
If you have an XKR either your fuel pump relay has failed for the #2 pump or the #2 pump has failed. To track it down you can switch pump 1 relay with pump 2 relay and see if the vehicle will start. If it doesn't then the relay is definitely bad.
If you have anything other than an earrly XKR post the info and we can try again.
First I have no idea what vehicle you are working on. You can go to the USER CP at the top of the page and add that info to your signature and it will always appear in your posts.
Second problem code P1646 if you have an early model XKR has nothing to do with O2 sensors. I have attached a copy of the DTC definition for that code.
If you have an XKR either your fuel pump relay has failed for the #2 pump or the #2 pump has failed. To track it down you can switch pump 1 relay with pump 2 relay and see if the vehicle will start. If it doesn't then the relay is definitely bad.
If you have anything other than an earrly XKR post the info and we can try again.
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GGG (05-21-2018)
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Sorry for being such a pain guys,ok I have ordered my sensor and I can see looking down into the engine compartment were the sensor fits ,next question,were is the plug in end of the sensor situated?also could you tell me were the relay is for this,thought I may just try a quick swap over as knowing my luck this just may be the problem, cheers guys👍
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You'd likely also get a P1647 if it was the relay since it powers both heaters, but see this post by GGG for the location:
https://www.jaguarforums.com/forum/x...8/#post1775585
It is in the RHS false bulkhead on both LHD and RHD vehicles, despite what JTIS reports...
https://www.jaguarforums.com/forum/x...8/#post1775585
It is in the RHS false bulkhead on both LHD and RHD vehicles, despite what JTIS reports...
Last edited by michaelh; 05-24-2018 at 07:54 PM.
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Ok guys just a quick update,I have now replaced each of my O2 upstream sensors yesterday with new sensors as i had the code p1646,now I get code p1646 and p1647 bank 1+2,when I clear the codes the engine warning light will go off for around 20 seconds then back on again,just wondering if I need to cover a certain amount of milage before it would reset itself,as I have only covered 2miles since the replacement ,if not what is my next step,any suggestions 😕
Last edited by graham11; 06-23-2018 at 10:17 AM.
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