P0470- Exhaust backpressure circuit malfunction
Open or shorted wiring/sensor.
P0478- Exhaust backpressure too high under normal driving conditions.
Stuck shut or partially shut exhaust backpressure valve or shorted EBP sensor.
P0232- Fuel pump relay driver failed off.
Voltage detected on fuel pump monitor circuit when pump was commanded off.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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