injectors and egr codes - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 06-24-2009, 04:54 PM Thread Starter Rookie
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injectors and egr codes

I have 2004 f-350 6.0L with codes for cylinder # 2,4,5 contribution test. egr codes 407 and 488 . Does anyone know what the codes mean? And how should go about checking them. I have not worked on a 6.0L before but have do work on 7.3L's.
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post #2 of 4 Old 06-25-2009, 08:11 AM Rookie
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If you have multiple injector codes for contribution, there's a good chance you either have or had low fuel pressure at some point. Fuel filters are the most common source, but fuel pump can be an issue as well as fuel tank vent being plugged. Check fuel pressure under full load, should be somewhere around 45psi min. I believe. The EGR valve is likely opening on its own. The original design has been updated.
Hope you haven't damaged the injectors yet with low fuel pressure.
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post #3 of 4 Old 06-28-2009, 09:23 AM
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btw: I live in a town that is 15 miles from GOOD diagnostic equipment


SOLD NCHornet's CCV MOD!, stancor GP relay, zoodad, 6637, fumoto valve, 4" turbo back no cat/muffler, Autometer gauges, & AE avail.

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post #4 of 4 Old 06-28-2009, 10:10 AM
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Doesnt mean a whole lot to me but here you go!

P0407 Exhaust Gas Recirculation Sensor B Circuit Low
P0488 EGR Throttle Position Control Range/Performance


2003 F250 Superduty XLT:

7.3L Powerstroke
TS Performance 6 Position Flip Chip
Eighteen K Power Module
DFUSER MAP-Maximizer
Turbo Master Wastegate Controller
Borg Warner Compressor Wheel
FASS Fuel Pump
FASS Suction Tube
AIH Delete W/Boost Fitting
Sonnax Shift Kit
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4" Magnaflow Turbo Back SS Exhaust
AutoMeter Ultra-Lite Gauges
6" Suspension Lift
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