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P1280 code

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115K views 11 replies 8 participants last post by  bkbaxter1  
I
#1 · (Edited)
Hey guys..this morning the 99 Powerstroke 7.3 E350 CEL comes on after a cold start..it went off after I cycled the key and then it seemed to start fine with no illuminated CEL until late this afternoon when it did it again.

RAn the NGS with Red diagnostic card and came up with this...

P1280...ICP low input

Ran KOEO On Demand....sys passed

KOEO Injestor Test.....sys passed (injectors all buzzed the same and no mute)

It doesnt sem to run rough at all, but have no clue what this is truly indicating which is an obvious fault of sorts.

Injector harness was replaced brand new about 3 years ago and cant see this as the problem....

PArt 2

Went outside on ran some KOER tests...

KOER On demand...P0476 Exh Press ctrl valve code

Cylinder contribution tests ...sys passed (this test should be the final check of the harness am I correct?)

KOER Glow Plug Monitor..sys passed

Any help would be appreciated,

Darren
 
Discussion starter · #3 ·
klhansen said:
DTC P1280 indicates injector control signal circuit out of range low.
Possible causes:
-- biased ICP sensor/PCM
-- open ICP sensor circuit
-- short to SIG RTN or PWR GND on ICP sensor circuit
-- open in VREF circuit

I'd look at your ICP sensor, and possibly the connector and wiring. If you have oil inside the sensor connector, then it's suspect. Could be an intermittent wiring problem like a connector socket that's spread too far apart to make good contact with the sensor pin.

That's the code you'll get if you pull the ICP sensor connector off with the key on or engine running.
Click to expand...
Where is the ICP sensor located on the 99 7.3?

Is it fairly accessable or a pia?

Darren
 
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99 & up 7.3L Power Stroke Engine & Drivetrain 6.0L Power Stroke Engine and Drivetrain 99 & up Upgrades and Aftermarket - 7.3L Engine Power Strokes 1994-1997 General 7.3L IDI Diesels (Not Powerstrokes) 1988-1993