Failsafe engine mode - Limp home
#1
Failsafe engine mode - Limp home
Today on the way to work my car went into failsafe mode. I drove home at about 10 miles an hour with a line of cars behind me - believe me it sucked. I just started it up and it displayed a bunch of codes on my OBDII reader (P1222, 1111, 1642, 1638, 1000, 1637, 1643) most of the codes deal with the CAN bus/ECM and the one of interest was 1642 which dealt with pedal position circuit - low input. It then refused to go into gear and I had to take the plug out by the shifter and override it. I started it after reading the codes and the dash displayed "Restricted Performance" I just started it again and the only issue was a check engine light. Any ideas? It is a 2002 XKR
#2
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VAXKR (06-23-2017)
#3
#4
+1
A failing battery is the number one regular cause of weird electronic faults on these models.
Look on the bright side - at least it fixed your concerns about the brake performance.
https://www.jaguarforums.com/forum/x...002xkr-184195/
Graham
A failing battery is the number one regular cause of weird electronic faults on these models.
Look on the bright side - at least it fixed your concerns about the brake performance.
https://www.jaguarforums.com/forum/x...002xkr-184195/
Graham
#5
Thanks for the info, I hooked up my battery charger and it read 12.3 volts to start (I charged it overnight at 2 Amps) which is low. I need to figure out the age of the battery - a bit misleading in appearance as it stays clean in the trunk. Is there a simple test for the alternator - I remember that if you detach the positive side of the battery and the car keeps running then the alternator is OK. Is that still a viable test?
#7
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#8
Appreciate all the posts in response to my query, as it turned out the battery was at 12.3V even after a night of charging (did not budge). I started the car with the old battery and it was reading 14.3 which tells me the alternator is working properly. I just installed a gel battery and it is under charge. I had the battery terminals disconnected and the check engine light is gone, tomorrow I will use my OBDII reader to remove the codes. Hopefully this solves the problem. Maybe I can do something fun like upgrade the brakes!