Jeep kj diesel problem p2099

[Mhili]

Hi, i have a jeep kj 2007 2.8 diesel model and i have a problem,when i drive it and then stop for example get petrol, when i drive off after about a minute the turbo shuts down, if i turn it off and start again its ok again, plus off the mark if you floor it it blows some gray smoke,it gets a p2099 code,if someone could help that would be great

[genie4x4]

Originally Posted by Mhili

Hi, i have a jeep kj 2007 2.8 diesel model and i have a problem,when i drive it and then stop for example get petrol, when i drive off after about a minute the turbo shuts down, if i turn it off and start again its ok again, plus off the mark if you floor it it blows some gray smoke,it gets a p2099 code,if someone could help that would be great

Don't stop and put petrol in a diesel and it will run better [emoji849]

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[dhula]

P2099 relates problem in O2 sensor circuits, likely O2 sensor itself.
Confirm which engine in car
Read error code again and report back
Then we might help best

[Mhili]

Thanks,it's going to the machanic and if he can't sort it out I'll send you the code its a 2.8 diesel engine or did you need more info,thank you very much

[Mhili]

Sorry the code was p0299

[dhula]

P0299-BOOST PRESSURE SENSOR POSITIVE DEVIATION


POSSIBLE CAUSES:

1. AIR FILTER
   Check air filter. If need replacing/dirty, replace it
2. AIR RESTRICTION
   Check all inlet pipes/hoses for restriction (eg; rag, wombat, collapsed hose, soft hose that might collapse when turbo boosting. Not forget to check CAC also
3. CHECKING FOR AIR LEAKS
   Check all inlet hoses/pipes for air leaks. Also check loose hose clamps/fittings. Not forget to check CAC

I include checks you can do at home for ease only. Other possible causes exist. If all OK from above checking report back and we help best with more info

[Billwill]

What dhula said ^^^

In the Sticky section above there is a link to the Jeep KJ Service Manuals which will give you a lot of information on your Jeep. The 2007 KJ is not covered...pretty much impossible to get the manuals for the 2007 KJ but the 2006 KJ manuals will be close enough.

At the end of the Index Page of the 2006 Jeep KJ Service Manual there is a DTC Index where you can look up error codes such as yours and it points you to the correct page....hopefully.... to direct you as to what steps to take.