My '99 Land Cruiser has gone into limp mode twice in the past several months. First time was when I was restarting it after a short break. We pulled a battery cable, and the "Check engine" light was cleared and it ran fine. Recently, it was after running it for about a mile - the "Check engine" light came on and it went into limp mode. After letting it set for a few days during the holidays, I went back out to see what I could do, and when restarted, the check engine light was gone, and vehicle ran fine. My local mechanic says his computer shows codes 120 and 121, which he says may be related to the accelerator pedal position sensor, but he can't get more detailed than that.

If it were in 'limp' mode, there will be an OBD code to confirm it.
Sounds like the timing is too far retarded, lucky you still have some valves!

diesel turbo
re check the fuel pump pressure and filter
p004
Fuel Volume Regulator Control Circuit High

Read more at: http://www.obd-codes.com/p0004
Copyright OBD-Codes.com
http://www.obd-codes.com/p0004

Something in the engine compartment is not working correctly, or is misaligned. The increased friction or misalignment could be causing the belt to fail. Needs to be investigated by a qualified mechanic.

Next time it does this have a can of starting fluid around and spray it into the intake of the engine, if the engine fires right up you miost likely have a fuel pump problem.

Having a restoration shop and running several newer Jaguars I have seen similar situations. Intermittent multiple errors such as these can be caused by a low battery (or corroded connections) that "fool the computers". Also had a '99 XJ8 VDP have exactly the same issues over several months. Issue was a manufacturing fault in the sensors on the throttle body that caused the "limp home" mode - usually in stop and go traffic. Jaguar had an inspection and recall on the throttle bodies but that vehicle had gone through 3 different Jaguar dealers for service and none looked at TSB/Recall or performed the necessary checks on the throttle body. Tried cleaning the throttle several times (per Jaguar TSBs) but no change. Had to replace throttle body & problem solved (over 30,000 miles since then). Recommend making sure all air connections to throttle are clean and open and cleaning the throttle area to see if that helps.

On newer Jaguars (and other Al bodied cars) similar problems occur when the "ground" connections to the body become poor (usually through corrosion but sometimes through collisions). Connections may look perfectly normal but have high resistance. Careful when working with the connections - the posts are usually very loosely fastened to the bodies. The engine quit on a 2005 XJ8 VDP when I turned the wipers on (fortunately I was driving slow in a parking lot) because one of the forward bulkhead ground connections was corroded (looked normal but separated from body when removing the wires to clean them).

Also there occur occasional funny intermittent issues with all newer Jags that seem to be untraceable and non-reproducable computer "glitches".Good luck.

Having a restoration shop and running several newer Jaguars I have seen similar situations. Intermittent multiple errors such as these can be caused by a low battery (or corroded connections) that "fool the computers". Also had a '99 XJ8 VDP have exactly the same issues over several months. Issue was a manufacturing fault in the sensors on the throttle body that caused the "limp home" mode - usually in stop and go traffic. Jaguar had an inspection and recall on the throttle bodies but that vehicle had gone through 3 different Jaguar dealers for service and none looked at TSB/Recall or performed the necessary checks on the throttle body. Tried cleaning the throttle several times (per Jaguar TSBs) but no change. Had to replace throttle body & problem solved (over 30,000 miles since then). Recommend making sure all air connections to throttle are clean and open and cleaning the throttle area to see if that helps.

On newer Jaguars (and other Al bodied cars) similar problems occur when the "ground" connections to the body become poor (usually through corrosion but sometimes through collisions). Connections may look perfectly normal but have high resistance. Careful when working with the connections - the posts are usually very loosely fastened to the bodies. Good luck.

HVE CHANGE MASTER CYLINDER IN LAND CRUISER STILL THE BRAKE GO INSIDE WHEN PRESSING..

either your cat has melted. Or your trans is shot

this is called an idiot light in the trade, it is telling you that you have a major engine problem and your engine is going into "limp home mode" get your dealer to check it out

get your glow plug relay checked as they dont seem to be working. a glow plug problem is the most likely cause and the relay is probley the culprit

good luck
RedGrunta