I have searched for answers and cannot find anything. My 2005 CRD has been running great until this afternoon. There was a noticeable loss of power and cel. I checked the codes and found U0146 and P0146 codes. I checked my ECM connections and grounds but did not really find anything. If I clear the codes I can drive a few mile before the light comes back on to the same codes.
U0146
P0146
U0146
P0146
Anyone have any ideas at all? Pleas help

P0146 O2 Sensor Circuit (No Activity).....

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

I figured out the codes
P0146 o2 sensor 3 bank1
U0146 lost gateway communication
The problem with the first code is I have no O2 sensors??

Ok,
After so many months of following this problem in my jeep. I have checked grounds traced wires etc. I reached the point that I was done and when whatever was wrong would finally go I would find the problem. A month ago my father in law noticed my high mounted stop light bulb was out. I replaced it and have not had a problem or trouble code since. Why?

I have no Idea...

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

Same "reason" a car I had decades ago would "report" a bad headlight bulb by the turn signals going nuts even though the 2 were on completely different parts of the wiring and different fuses. Electrical systems do weird things and modern computer systems make them do even weirder things. If this "fix" works say thanks and move on.

Long winded version of I have no clue either.

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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