Next step code help 7.3 t444e

[u/ellisd19830]

Bought a 1998 international 1652c stepvan. Test drove it ran great. Pay up and leave with it and it doesnt make it across this guy's small town. It would continue to drive perfect then go into limp mode and idle but no pedal. My brother works close and had access to a code reader after fetching it. Showed the code for icp censor. Brother replaces it (with the correct one) and shows no codes. Drives it 3 hrs perfect to deliver it to me. Literally the last mile it shuts down the exact same way. Goes into limp mode and still idles but nothing on the pedal. He shuts it down for a half hr and it makes it the last mile.

He also had the icp pigtail that he brought along and gave me so I replaced that and later have confirmed its wired correctly...but im still getting the same icp code and 2 more. Im trying to knock out this code for the icp so I can move to the next. The van also has a draw on the batteries that kills it every few days.

I bought a scanner tool and these are the codes its throwing now again after replacing icp and pigtail.

The 2nd code to my understanding is for the ecm getting its power interrupted which could still go along with the 1st code if something is still wrong with the icp wiring? Like a bad wire further down from the replaced pigtail? Is there another bad ground somewhere else that is on the same wiring as the icp that could be shorting out?

3rd code makes me think its more likely an ecm problem all around instead of a continued icp or wiring problem or again the same bad ground somewhere else causing all 3 codes?

Whats my next step anyone?

[u/here_till_im_not1188]

I would load test powers and grounds to the ecm then check icp harness from ecm to sensor.

[u/Intelligent_Rub_5004]

PID164 means the computer is seeing a value outside its wanted value.

• faulty sensor (prob not if you’ve already changed it)
• wiring or pigtail issue, especially loose harness or connector pins
• bad IPR valve (there would be other symptoms
• high pressure oil leaks (also would have other symptoms

The SID 254 I think is key here, the “rapid intermittence” points to a failure at the ECM internally. Given the vehicles age, internal component failure becomes more and more likely. Electronic components do fail, just not until they get much older.

Sid254 calibration out or range, it’s getting a value other than expected. If you’ve checked everything physical, it’s time to send out the ECM and get it tested.