Compression Ignition Addict
Join Date: Dec 2007
Location: IA MN SD
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P0611 typically indicates a dying FICM. I have never heard of cold weather directly causing the P0611.
Cold weather is when dying FICMs tend to show themselves. Thicker cold oil makes the FICM work harder to buzz the injectors before a cold start up.
My truck started right up yesterday after not running for two days in 10F high/-10F low temps, not plugged in.
Last winter, before I replaced my FICM, that never would have happened. Any time it got to 20F or lower, it was a crap shoot as to whether it would start or not, and the struggle to start really taxed my batteries, alternator, and starter.
So I opted to replace the FICM before I had to replace the FICM, batteries, alternator, and starter.
And now I'm confident that my truck will start after being unplugged overnight in temps down to -10F.
06 F250 Lariat cc sb FX4
97kmiles, coolant filter
analog FP gauge + Edge Insight w/ EGT
As of 1/5/12, one of MANY SATISFIED CUSTOMERS of Ed at FICMRepair.com