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P0472 Exhaust Back Pressure Sensor Circuit Low Input
Possible causes:
open EBP sensor circuit
biased sensor/PCM
short to SIGN RTN or PWR GND on EBP sensor circuit
open in VREF circuit
P1210 Injection Control Pressure above expected level
Possible causes:
biased ICP sensor
open ICP signal return
signal circuit shorted to power
damaged PCM
Notice a common thread here? The 3-wire sensors (EPB, ICP and others) share a common VREF circuit, and also Signal Return.
That second code is probably the cause of your problems. It may be a bad ICP sensor or a short somewhere in the sensor harnesses. One guy reported that a bad EBP sensor killed his truck, it would run without it plugged in, but didn't when the EBP was plugged in.
You said that it took multiple tries to start with the ICP plugged in. That indicates a problem with the ICP sensor. If it will start and run well with the ICP unplugged, then the culprit is most likely your ICP sensor.
The B1483 is a GEM code and not critical to the engine running. Brake Pedal Input Circuit Failure
Could be a bad brake pedal position switch.
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First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version  ), AIS, coolant filter w/"hokum" bracket, regulated return, heated mirror mod, lighted cupholder, Marinco heater plug-in.
Hard or no-start? Check Here
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