Oil pressure, water in fuel, & cel all came on at once. Fuel gauge also pegged to Full. P0299 & P0530 fault codes showing. I replaced the oil sensor, fuel filter, and cleaned the MAP sensor. Oil light went out for a day, then came back on. None of the other things changed. Oil pressure good per mechanical gauge test. Dash diagnostic shows the fuel gauge to be fine. Factory manual indicates that the fuel gauge show full when the voltage is at 0.08, and empty when voltage is higher, so I'm planning to look for broken/crimped wires next but I'm running out of other ideas. Jeep runs great in spite of all the lights and codes. Any ideas? This is a 2005 CRD with 166,000 miles.

JDRoalkvam

For what it's worth how old is your battery and are the terminals clean? I mention this because my son (06 CRD) and I experienced weird fuel gauge behavior with relatively old OEM red top batteries that were still good enough to crank the vehicle but apparently not good enough to make the computer systems completely happy. In both cases a new battery solved the problem. However, neither of us had your other electronic issues.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Battery is spanking new - about a week old.

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JDRoalkvam
Western WA

Check your wiring harness(s) real close as some on here have found and reported some rubbing or chafing into the wiring harness behind the fuel filter mounting bracket.... Just a thought!!!
A rubbed raw spot on a harness could cause some the symptoms you described...

Good luck and keep us posted as to what you find...

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve

Update: the rubber boot on the vacuum line going to the solenoid was split. I cut it off and got a push on replacement at NAPA, which solved the P0299 & P0530 codes for only about $1. On the test drive, the fuel gauge jumped from F to E, and the low fuel light came on. It really has about 3/4 tank. Then the gauge slowly climbed back to F. WIF light & oil pressure light both still on. This is looking more like a crimped or pinched wire bundle. I'll keep searching. Meanwhile, it runs great.

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JDRoalkvam
Western WA