Hello all. I've been looking around for an answer to what seems a unique issue and I wonder if anyone can help out. I'll give the full account, so if you want to get a cup o' joe and a bagel first, please feel free.

Last summer I had the timing belt changed at my local mechanic. Shortly afterward the CEL came on, P0101. Not sure if this is related or not, but thought y'all would like to know. After a bit of research, I found this was for the MAF, so I replaced it and the CEL went off. For a while. This was later in the summer, so nights were getting cool while the days were still warm. In the morning the CEL would be off and in the afternoon it would come on. It didn't seem to be causing too much concern other than a modest hit in the fuel economy.

Throughout the winter the CEL remained off except on those rare occasions when it would get warm during the day coupled with a lot of driving.

Now that spring is here again, the CEL started the on/off cycle again. I've checked the hoses and they all appear fine. No cracks I can see. The compressor inlet hose from the airbox was loose at the compressor (Hose clamp loose, not the hose itself) I tightened that connection and drove it for a while but the CEL remained on. I have not driven it today to see if the CEL reset or not.

Any ideas as to what else I might check to identify the cause of this issue? I now live in Anchorage AK and don't drive often, but 99% of my driving is in town, so the hit of the lower fuel economy coupled with nearly 5 dollar a gallon fuel is putting the cramp on. I probably wouldn't even bother fixing it now, as I bike commute 100% anyway, but have family coming up for vacation and will be expected to taxi them around. You know how it goes.

Anyway, any ideas would be appreciated. I am loath to take it to the dealership and have not found a mechanic up here I trust yet. Besides, I'd rather fix it myself if possible.

Thanks all.

it sounds like a pinch wire problem.... you might want to look for the service manual where it shows how to test the MAF while pluged in so you can see the voltage droops and check for resistance at the conectors, also you can simulate warmer conditions arround the maf with a hair dryer at max heat. I know its no fun but it is just something you might want to consider if you have already try other venues.
good luck.

Very good idea here. I'll give it a try this weekend.

Any other thoughts as to possible causes/fixes?

You don't mention the year but on the 06's check the large harness from the rear top of the engine that goes behind the fuel filter. The filter head and bracket are mounted highter to clear the abs/esp thing and the harness hits a sharp area of the bracket below the area that's flared to avoid the harness on the 05's.

If you have an 06 get a 2-3 inch section of 5/16" fuel line. Slit it down one side and slip it over that area of the bracket

_________________
Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

It might not be worth it for you with the amount of driving it sounds like you do... But the smile you'll get from the results might make you want to drive a bit more.

A Green Diesel Engineering eco-tune will neuter that stupid MAF sensor and stop the constant cycling of the check light. The connectors and wires on that thing are notorious for being weak. Personally, I suspect that they might be getting impacted by the hood blanket, and even a light contact while going over bumps will be VERY effective in breaking a wire if you give it enough time.

_________________
Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.