What is a PCM? As usual, the service rep did not know what it stood for or what it does, only that it was "part of the computer". I also asked if that could be why my mileage has dropped into the teens and he said "sure", but could give no explanation why. Anyone else had this code? By the way, the part is on backorder for an unknown length of time, I'll get an "orange card" in the mail when its in....thanks...W

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2005 CRD
Full armor
2.5" Daystar Lift
245/75 16 BFG All-Terrain T/A's

In my work world PCM is Pulse code modulation.. in the Jeep world it is a computer module used to contol the engine fuel management system and more. I think we also have BCM ( body control module) that almost all things electrical go throught. It does things like control the power door locks and interior lighting and more. Nothings simple anymore.

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Sold 05 CRD Patriot Blue, hole in the roof, Trailer tow, factory skids, LSD, Saris load bars, Michelin LTX M/S
Current Bright white 2010 Dakota Quad Cab 4x4 V8

My '93 Dodge Dakota called a PCM a Powertrain Control Module. Controlled everything electrical.
William

PCM does stand for Powertrain Control Module. How low has your MPG dropped specifically, and exactly what code is being thrown by the computer? I've never heard of such a code saying that the PCM needs to be replaced....not saying that it doesn't exist, just saying ive never heard of one. And since the PCM does control most of the electrical, one would think you'd be having electrical problems like nobody's business

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--Tim

-LOST #005816
-2003 KJ Sport
-3.7L V6
-235/70/16 Bridgestone Dueler A/T REVO'S
-Factory Fogs
-Sunroof
-Custom Mounted Mag Lite
-Jeep Stainless Steel Coffee Mug
-Autozone Rubber Floor Mats

Better check with them to make sure they get the right module. If you check the FSM, gassers have PCM's, CRD's have ECM's - Engine Control Modules. Yes, they are two entirely different modules, different connectors, different harnesses. CYA, better call the tech back and make sure they understand.

The PCM fault code is probably a generic carryover from the gas version, but means the same - computer is FUBAR.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler

Dealer did call and tell me that it actually was an ECM not a PCM that I need and it is in fact on backorder....he also asked me where I got the green gas cap so I don't have too much faith in them as far as CRD's go. I hope it comes quickly, they had no idea when to expect it but I'm on track to get right at 15 mpg this tank. I usually get mid 20's mixed....if only they could give me some free diesel because hey, its not my fault that its on backorder and I'm suffering at the pump until they get it in. Keep dreaming, right?

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2005 CRD
Full armor
2.5" Daystar Lift
245/75 16 BFG All-Terrain T/A's

You know, I've had 401 and 299 codes for three weeks. (bad EGR) everytime I go to the dealer, it's a day or two to "look at it." I asked them to order the EGR based on the codes. Won't do it. I leave it for two days. Guess what they tell me? "It's got a bad EGR. We'll have one next week, do you want to leave it?" The really good service writer has gone to another dealership. I'm starting to think I may just see if my local Dodge dealer will do my warranty work for me. At least there they have actual diesel mechanics.

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Liberty CRD - I love the smell of diesel in the morning....2005 Limited, 2.5" Daystar in Front & 2.5" OME springs in rear. Ranchos all around