P 0470 is "EGR boost sensor" failure. replacement of the sensor without further diagnosis will most likley end with the check engine light still burning brightly. pull the egr valve off of the intake. the bottom port is exhaust pressure. the top runs through the lower and upper intake to just behind the throttle body. chances are the port through the intake is completely plugged with carbon. split the upper and lower intake and clean the egr passages. a good carb and choke cleaner and a stiff wire will break up most of the carbon.
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P0400 - Exhaust Gas Recirculation (EGR) Flow
The electric EGR (EEGR) system is monitored once per drive cycle during steady state conditions above 77 km/h (48 mph). The test fails when a concern is detected by powertrain control module (PCM) calculations indicating the EGR flow is less or greater than expected.
EEGR valve stuck open or closed
Connector to EEGR not seated
EEGR motor winding circuits short or open
No voltage to the EEGR
Harness open or shorted to voltage or ground
Vacuum signal to manifold absolute pressure (MAP) restricted or leaking
Mass air flow (MAF) sensor signal erroneous
Carbon build up in the EEGR valve seat area
One or more sensors is not responding or is out of range
All of the following sensors input data to the PCM for correct operation of the EEGR system: engine coolant temperature (ECT), crankshaft position (CKP), intake air temperature (IAT), MAF, throttle position (TP), MAP. Any DTC relating to these sensors must be resolved prior to addressing code P0400.
Application Key On Engine Off Key On Engine Running Continuous Memory
GO to Pinpoint Test KD .
Wells Ford EGR DPFE Training with Sgt Tech P0400 P0401 P0402
code p 0470 refers to exhaust gas pressure pressure sensor ---circuit malfunction====causes --wiring---exhaust gas pressure sensor ---ECM
if you have no fuel check the pump and pump relay for operation
P1400 Exhaust Gas Recirculation valve position sensor P1401 Exhaust Gas Recirculation valve position sensor P1402 Exhaust Gas Recirculation metering orifice restricted P1403 Exhaust Gas Recirculation differential pressure sensor P1404 EGR Temperature Sensor circuit P1405 Exhaust Gas Recirculation Differential Pressure Feedback Sensor upstream hose off or plugged P1406 Exhaust Gas Recirculation Differential Pressure Feedback Sensor downstream hose off or plugged P1407 EGR solenoid -No Flow Detected P1408 EGR solenoid -Flow out of Self- Test Range P1409 EGR Vacuum Regulator solenoid circuit malfunction ---
The sensor for the EGR Valve position is not functioning correctly.
The OBD II code for P0400 is Exhaust Gas Recirculation Flow Malfunction.
I'm sure the only thing you have left is you may have to replace the EGR valve or check for any leak from the vaccum lines going to to EGR valve.
P00A0 is a factory readable only code (i.e. only ford dealers have the computer to read it)
the P0400 is a generic E.G.R. flow restriction code. so yes a dvom (multimeter) and a vacuum pump to diagnose it correctly, also check for loose wires as ford harness connectors are known to fail alot due to crappy phenolic content in the plastic and heat combined they can warp and / or corrode the contacts