I've had the two codes pending for the past months but after doing as much research as I can but haven't found any useful information as to what these codes could be.

I always seem to get them come up on my ultra guage after doing a hard pull from about 65mph to >90mph. I read somewhere that it could be the neutral safety switch but my car only starts in either "P" or "N" so I don't think there's anything wrong with the switch...?

By the way, this is on my 97 XJR

 

Generic and Jaguar specific OBD-II Diagnostic Trouble Codes

seems to say that

P13B0 would be ignition misfire, then B0 could be bank B, cylinder 1

Then again, shouldn't everything after the P be numeric? Maybe try a code
reader/software combination that presents the data as all numeric.

 

I've had the same ever since I bought mine. Tried researching and couldn't find much of anything. They always stayed pending so I never worried about it. Will be interesting to see the responses in this thread.

 

Hi Alb,

Unless a proper solution comes along here, why not simply clear it once in a while and go on about your business? Pending codes stay that way when there are few, or no more similar minor occurrences, and who knows how many it will take before the "Diagnostic Manager" sets the CEL?

I'm not familiar with any alphanumeric code system for this car either. Perhaps that is how pending codes stay until it is decided which code will be set hard?

 

Is your Ultragauge reading with protocol ISO 9141? If not, scroll down the menu and follow the procedure to force the protocol.

 

It was awhile until I drove the XJR again but I went through my Ultragauge settings and forced the 9141 protocol but this morning I still got the pending code alarm

I guess I could just keep clearing it like I have been for the past few months but I'm curious to see if it is affecting performance. The pending code alarm only goes off after I do a hard pull (merging onto the freeway or from 65mph to 90mph)

Could it be related to the secondary fuel pump?

 

Is it the same strange codes?

 

Yup. I'm gonna try my other ultragauge that's in my truck tomorrow and see if it's comes up on that

 

Did you make any headway here?

I am having the same issue now on my 1997 XJ6L
(can't pass EVAP or CAT monitors after trying EVERYTHING)

 

Any knowledge on what these codes are would be appreciated.B30F4 & P13B0?