Have a 2006 Ford1500 with a blown head gasket (only 67,000 miles!). I had the heads milled and valve job done since they were apart. It had bent one rod, so I had to have the bottom half repaired, so now it has new bearings, new rings and a new rod. After reassembly, I found that the same hole with the bent rod had a bad fuel injector – which was what probably caused the head gasket to blow. I replaced the injector and had everything back together again. Codes cleared and the system came up good. When I drive the vehicle everything is great, but when I stop and turn off the vehicle then start it back up, the engine light comes back on. So I run it on the computer again. Code comes up “P0345 Cam Position Sensor A bank 2 ckt malfuntion”. I replaced the sensor even though I thought it was good. It still does the exact same thing, where the check engine light comes on after starting up after it’s been stopped. And, when I drive it with the engine light on, the vehicle is getting 8 or 9 miles to the gallon; after resetting the computer it gets 12 – 14 mpg and before all this it got 16 average mpg. That info comes from the onboard computer display. ANY IDEAS FROM ANY WISE MEN OUT THERE PLEASE??

 

Apologies for double posting - I searched for the message and it didn't show, so thought I missed hitting the button!

 

Please confirm that you have a 4.2 V-6?