Hi guys,
a couple of days ago the MIL light came on but the car was running just fine. I stopped and checked it with my OBD...the result was a P0299 code which said Turbocharger underboost. I reset the code, had a good look at the engine compartment but nothing strange in there. Today the MIL light came on again and, as a deja vu, everything looked the same: P0299, no apparent issues, and car engine performing exactly as it should. Any idea? Just to give you a full picture: one month ago I replaced the air filter, the diesel filter and the MAP sensor. Could it be a faulty indication or something is happening but I just don't know where to look at? Has any of you already experienced this kind of problem?
Thank you all.

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JEEP LIBERTY 2007 - 2.8 CRD - 120 KW

If you experience no drive ability issues at all, my guess is faulty reading/sensor.. Wet sensor.. Or other electronic failure.

Can you test the sensors in question with a 12v multimeter?

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2004 KJ 3.7 Limited:
IRO WJ Upper Arm -- WJ Rear LCA's -- Rear Driveshaft Spacer -- JBA Upper A Arms -- 4 inch Lift -- 265/75/16 4" B/S -- WasherBottle Relocate -- Custom High Mount Intake -- Carpet Delete -- Homebrew Winch Bumper -- Warn VR8000 -- Homemade Plow -- Pinch Weld POUNDED -- POR 15 inner fenders --

Sure I can but where the turbo sensor located? Thanks

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JEEP LIBERTY 2007 - 2.8 CRD - 120 KW

Google baby. It's my best friend, I will share it you

If at the very least you can't find the location, you can find a picture.

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2004 KJ 3.7 Limited:
IRO WJ Upper Arm -- WJ Rear LCA's -- Rear Driveshaft Spacer -- JBA Upper A Arms -- 4 inch Lift -- 265/75/16 4" B/S -- WasherBottle Relocate -- Custom High Mount Intake -- Carpet Delete -- Homebrew Winch Bumper -- Warn VR8000 -- Homemade Plow -- Pinch Weld POUNDED -- POR 15 inner fenders --