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 T444e codes 124 and 223 Question
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cb239
Active Member

USA
10 Posts

Posted - 02/17/2006 :  05:19:17 AM  Show Profile  Visit cb239's Homepage  Reply with Quote
i have a truck with a t444e engine iin it,runs great for while then runs real crappy like it is loosing electical power,it acts like you turn the key off for half a sec then goes to running real bad for while,clears up and runs great for while and does it all over again,it could last awhile running crappy and then go the next day with out a problem.code 124 is Injector Control Pressure Sensor (IPC) Signal Out Of Range Low,does this mean it is loosing power, the 5v power ,and the other one is 223 Vehicle Personality Module (VPM) Not Communicating With Electronic Control Module (ECM)would this code make it run crappy,or should i focus on the 124 first..thx for any help...

ModMech
Top Member

USA
948 Posts

Posted - 02/17/2006 :  5:18:30 PM  Show Profile  Visit ModMech's Homepage  Reply with Quote
Code 223 is VERY common, and generally can be ignored. Of the three times that I have run into, and repaired the code each was a wiring problem at or near the main harness take-out at the firewall on the engine side. W/o a diagram, you will never fix this.

Code 124 means that the signal wire for the ICP sensor (three wire) is shorted to ground, either perminantly or intermittantly (most likely from your description). Again, you will NEED a wiring diagram, but this should be a very easy fix, simply find and replace the signal wire between the sensor and the ECM (or as close to them as you can get).

If you want customer service, you NEED an International!
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cb239
Active Member

USA
10 Posts

Posted - 02/17/2006 :  7:34:43 PM  Show Profile  Visit cb239's Homepage  Reply with Quote
Thx for the help,where is a resonable place to ge a wiring diagram, and would it be possible to be a faulty sensor...
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mrschoolbus
Senior Member

USA
78 Posts

Posted - 02/18/2006 :  06:47:51 AM  Show Profile  Reply with Quote
The ECM continuously monitors the signal of the ICP sensor to determine if the signal is within an expected range. If the signal voltage is higher or lower than expected, the ECM will set a fault code. The ECM will then ignore the ICP sensor signal and will use a preset value determined by engine operating conditions. If the ignition key is shut off, the code will become an Inactive code.


FLASH CODE 124

ATA CODE PID 164 FMI 4

ICP SIGNAL OUT OF RANGE LOW

An out of range low code 124 will be set by the ECM if the signal voltage is less than .039 volts for more than 1.0 seconds.

Code 124 may be set due to an open or short to ground on the signal circuit, a defective sensor or an open VREF circuit at the sensor.

FLASH CODE 125

ATA CODE PID 164 FMI 3

ICP SIGNAL OUT OF RANGE HIGH

An out of range high code 125 will be set by the ECM if the signal voltage is greater than 4.9 volts for more than 1.0 seconds.

Code 125 may be set by an open return circuit, short to a voltage source on the ICP signal circuit or a defective sensor.

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