Medium and Heavy Trucks
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Hi Matt. My name is***** will be glad to help. Please post all the fault code numbers you are getting.
Thanks for the update. Take a close look at the injector harness and connector pins to the injectors for corrosion or damage and chaffed/shorted wiring. Also check the Actuator harness for the same and EBT sensor harness. These are all codes related to a shorted harness.
What scan tool are you using to pull those codes? Could you pull them from the dash so I can find them easier in my files for the troubleshooting info. It will make it easier digging them up in international format. Click this link for the code procedure.
4004/Bus 1602 5
Connector #4004/Bus 1602 Pin #5 Fuel level sensor out of range high.
This code is associated with a short to accessory or open circuit on the fuel level sensor on the draw tank for both single tank and dual tank vehicles.
Shorted high or open circuit.
1:4 613_14A This code is logged due to wrong positioned/unresponsive actuator motor for mode - Detected by HVAC control head. One of your blend doors is jammed or broken.
Looking up the others... bare with me
2023-14p-107-5:EGC gauge location 7 (fuel level) sensor fault to primary EGC (107) There is a problem with the sensor that provides the data for this gauge.
These are the active codes but unrelated to your engine problem. The ones with P are inactive. This is the international list. I will have to try to convert them to their code number since the Launch numbers do not match.
I would take a closer look at the harness and connector pins and under the valve cover from the recent work and do a continuity check on the harness with an OHM meter.
Click on this link. I am logging out for the night but I log in periodically throughout the day and evenings for follow ups.
If there is trouble accessing the files click these two links.
Thanks for the info. Click on this link for the chassis schematics.
Here is actually a more up to date version for your year chassis.
Click on this link.
thanks for the update. It is possible you have a few things going on here. Check the turbo actuator for proper operation and turbo for damage. Also check the actuator harness for damage. If the injector harness is good try swapping injectors from the first 3 cylinders with the last three ans see if the problem changes to 4,5,6 in stead of !,2,3. If so replace the faulty injectors. If not and the harness is good you likely have failed injector drivers and potential IDM/ECM issues. Try a test ECM or IDM if you have one available. LEt me know
Hi Matt. I agree. Verify the ECM and IDM have good voltage and grounds from the batteries and there is no corrosion or harness issues at the IDM relay, and the inline harness and fusible links from the batteries. If so and the engine harness has not shorts or issues to these components then I suspect a possible IDM/ECM problem. Let me know
Thanks for the update Matt. Keep me posted.
Check the schematic I posted and follow/test the circuit from the batteries to the 12 pin connector wires 97 AP and 97APG for the actuator and verify 97DC for EBP is grounded with no poor connections or shorted/corroded wiring throwing off the sensor signal or an actual faulty sensor.
That is odd. The EBP sensor voltage from the ECM will be 5 volts as the ECM sends a 5v signal to the sensors and reads the return voltage from the sensor for its information. So in this case if the return signal wire is good with no shorts to power or ground Id replace the sensor. Now for the VGT the voltage should change based on what the ECM commands for VGT position. Check all you grounds and clean and tighten the connections. It is possible when removing the relay power or ground is getting redirected flowing to the path of least resistance causing that circuit to function unless there is a short between the two circuits.