SICK TRUCK
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Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
SICK TRUCK
My truck is sick to the point of not being reliable enough to drive. Crank the engine and it starts and idles fine for a short while. Can be a few seconds or a couple of minutes and then....either:
A. Dies like you killed the key. Will then re-start and act like a cold start 'romp' but much worse. If I rev it up then go back to idle it is just fine, for a short while.
B. Idles fine for a while then gets the same violent 'romps' as above.
As long as the RPM's are up there are no problems.
CEL and codes:
P0470- EBP sensor circuit malfunction.
P1280- Integrated control panel circuit out of range low...
P0501- AIH....it's removed with no resistor.
P0603- Internal control module KAM malfunction.
These symptoms are with and without tunes.
Thoughts?
A. Dies like you killed the key. Will then re-start and act like a cold start 'romp' but much worse. If I rev it up then go back to idle it is just fine, for a short while.
B. Idles fine for a while then gets the same violent 'romps' as above.
As long as the RPM's are up there are no problems.
CEL and codes:
P0470- EBP sensor circuit malfunction.
P1280- Integrated control panel circuit out of range low...
P0501- AIH....it's removed with no resistor.
P0603- Internal control module KAM malfunction.
These symptoms are with and without tunes.
Thoughts?
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
DTC P1280 indicates injector control signal circuit out of range low was detected during KOEO Self Test or during continuous diagnostic monitoring.
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
Look at your ICP sensor for the "oil in plug" . Unplug the ICP sensor and see if it will idle and run fine with it in "default". More than likely a bad sensor, but could be wiring.
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
Look at your ICP sensor for the "oil in plug" . Unplug the ICP sensor and see if it will idle and run fine with it in "default". More than likely a bad sensor, but could be wiring.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
The EBP and ICP (as well as other sensors) share a common +5V reference signal. If the EBP circuit is malfunctioning, it goes to logic that this could cause a bias on the ICP.
A faulty (or bias) ICP could cause your symptoms, albeit yours are extreme for an ICP sensor issue. Just food for thought. Check the wiring.
A faulty (or bias) ICP could cause your symptoms, albeit yours are extreme for an ICP sensor issue. Just food for thought. Check the wiring.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
The EBP and ICP (as well as other sensors) share a common +5V reference signal. If the EBP circuit is malfunctioning, it goes to logic that this could cause a bias on the ICP.
A faulty (or bias) ICP could cause your symptoms, albeit yours are extreme for an ICP sensor issue. Just food for thought. Check the wiring.
A faulty (or bias) ICP could cause your symptoms, albeit yours are extreme for an ICP sensor issue. Just food for thought. Check the wiring.
I have seen a bad ICP sensor cause an engine to falter akin to that of a gasser with bad plug wires.
The OP's statement "As long as the RPM's are up there are no problems" seems to indicate something other than wiring.
Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
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Lead Driver
Joined: Jun 2007
Posts: 7,760
Likes: 27
From: Hampton, Maryland.
Joe, you have to hook up with someone with AE and get some data. I agree with Roland though, shooting(almost) blind, it sounds a lot like ICP. When mine went bad, it would idle funny then shut off like I turned the key off. It would restart and then drive fine. Yours sounds more extreme and may indicate ICP and something else with it.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
(snicker) Sorry... couldn't hold that one back. I remember helping someone that had AE, yet dreaded hooking it up. 
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Suggestions? Drive to Roland's house. 
Short of that, I'd be checking and double checking the ICP and IPR wiring. 1280 is the code you get when you unplug the ICP sensor and run it. Seems like I remember someone having that code with chaffed IPR wires too, but can't be sure on that part. Still worth checking though.
Before you throw money at a new sensor, try it for a few days with the sensor unplugged. Power will be a little low and you'll still have the CEL, but if the symptoms remain, it's not the sensor.
Short of that, I'd be checking and double checking the ICP and IPR wiring. 1280 is the code you get when you unplug the ICP sensor and run it. Seems like I remember someone having that code with chaffed IPR wires too, but can't be sure on that part. Still worth checking though.
Before you throw money at a new sensor, try it for a few days with the sensor unplugged. Power will be a little low and you'll still have the CEL, but if the symptoms remain, it's not the sensor.
