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P0674 - Glow Plug #4 Circ Failure
P0463 - Fuel Level Sens Circ High Input
P0460 - Fuel Tank Level Indicator Circ Error
P0341 - Camshaft Pos Sens Circ Perf (Bank 1/1 Sens)
P0261 - Injector Circ Low Cylinder 1

Got a set of injectors coming to solve the last one. The fuel gauge dropped the other day to E then came back up to 1/2 tank about 3 miles down the road.

Question. Should I replace the CPS?
 

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I'd check your FICM voltage for the p0261 code before dropping the money on a whole set of injectors. Not saying it is the FICM but it's a lot cheaper and a very well known issue. Usually you get low voltage codes for multiple injectors if the FICM is bad but it would still be worth checking. Excessive crank time can also set a code for the CPS. You don't see very many fail on a 6.0
 
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