Last post on Jan 12, 2012 at 12:51 PM
You are in the Jaguar XJ-Series
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Jaguar XJ-Series, Engine
#8 of 17 DTCs P1000, P1111, P1121 & P1642
Apr 11, 2009 (7:59 am)
I have a '99 XJ8 with 106,000 miles. It has run fine with no problems until recently. I was in stop and go traffic and suddenly the car would not accellerate from a stop. The instrument warning dispayed "Engine in failsafe mode", "Transmission failure" and " Stability control inoperative". I had the vehicle towed home and checked the DTCs. They were P1000, P1111, P1121 and P1642. I cleared the codes and the car runs fine. After about 10 minutes of driving, the "Engine in failsafe mode" light comes on, but the car runs with no noticeable differences. I was once a Ford Master certified technician and know my way around diagnostic charts and I can speak the lingo. I just don't have the diagnostic charts. Can anyone help with any answers or experiences?
#9 of 17 Re: DTCs P1000, P1111, P1121 & P1642 [snakedoctor56]
May 12, 2009 (2:48 pm)
Hi- I own a 1998 XJ8 I just read your post on the codes --- I have a 1642 code which indicades a CAN ( Control Area Network) issue- which would be caused by either a bad connedtion between the ECM and one of the body control units -- I think mine may be related to the cruise control module..
The 1121 code indicates throttle pedal position sensor issue, this devise is activitated by your throttle pedal -- the could be as simple as raising the hood and spraying the devise that is connected to your pedal wire with electrical contact cleaner and then ( with the engine off) working the Pedal up and down 5 or 6 times and spraying again and working the pedal again
I would appreciate your finding with the 1642 code since i have the same issue. I did rest my code and turned OFF the cruise contol switch to see if the code comes back on --- I will let you know
The P1000 code indicates the code functions are working. This code you should not be concerned with.
The P1111 codes indicates the code system has done a complete scan.--- This code likewise should be ignored for NOW.
The 1642 and 1121 could be just a bad connection at the PLUG of the harness between the ECM and the other devices
Unplug the connectors and plug them back together.. If you need more detail Eamil me at crpacecox.net
Hope this helps
#10 of 17 check eng light
Oct 09, 2009 (7:25 pm)
i have a 93 xj and the eng. light has been on how do i turn it off.
#11 of 17 service eng. light on
Oct 09, 2009 (7:49 pm)
i have a 2000 ford van E-150 and the service light is on can one some tell me how to turn it off what do i need to do. thanks
Oct 09, 2009 (9:33 pm)
Go to autozone they will check codes for free... ask them to clear the code...
#13 of 17 Re: Engine CK lt [bigdadbear]
Oct 13, 2009 (7:36 pm)
thank you i'll try that
#14 of 17 Re: DTCs P1000, P1111, P1121 & P1642 [snakedoctor56]
Nov 04, 2010 (5:43 pm)
Hi, I am having the same problems. Sometimes the engine will start with all the warnings displayed and then dye within seconds.
What did you do to fix this problem? Is it computer related?
should I try and get the computer re-programed?
#15 of 17 Re: DTCs P1000, P1111, P1121 & P1642 [phase1man1]
Nov 05, 2010 (10:12 am)
Since your vehicle is dying right after you start it up, you should first clean the Plate inside the Throttle Body (Spray Cleaner on Soft Cloth and gently wipe the Plate and inside the Body until clean) and the Map sensor( Spray the Cleaner on - Do NOT Touch sensor) that is attached / inside the Air Duct box going to the throttle body.....
Be sure and disconnect the battery before doing the ABOVE. Get the correct cleaners for the Throttle Plate and Map Sensor.
Please post if this works for you.
#16 of 17 Jaguar xj8 01 Engine light?
Jan 12, 2012 (8:28 am)
Car runs fine and starts ok, but get a Code 1230 Fuel relay. Have changed relay and fuse and fuel pump pressure reads ok? Get rid of this code and it will come back on with engine light and read same Code 1230? Has anyone had this problem and can offer advice?
#17 of 17 Re: Jaguar xj8 01 Engine light? [denham]
Jan 12, 2012 (12:51 pm)
Don't know really much about this, have only had my car about 4 months...but on checking on another issue it was recommended that I do a full "ground" check and have any corrosion cleaned or connections replaced.
I do know that "ground" gremlins can cause strange problems on most any car.