Hello Everyone!

[Pilsnr]

Your trouble code and symptoms do not point towards the throttle body.

Did you have the 5 Volts at the APP sensor pin one with the ignition on?

Yes, I had 5v between 1 and 3 pins and between the 4 and 6 pins.


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[Pilsnr]

Yes, I had 5v between 1 and 3 pins and between the 4 and 6 pins.


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And going by your original instructions, it reads if yes, replace the accelerator pedal position sensor, which I’ve already done.

Next is the diesel particulate pressure sensor, and I believe I’m not using that sensor being deleted.

I will check to ensure I’m getting the 5v there, though.

Which would tell me if the problem lies between those two sensors.


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[AK Bob]

And going by your original instructions, it reads if yes, replace the accelerator pedal position sensor, which I’ve already done.

Next is the diesel particulate pressure sensor, and I believe I’m not using that sensor being deleted.

I will check to ensure I’m getting the 5v there, though.

Which would tell me if the problem lies between those two sensors.


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Okay, so 5V at the PPS rules out a short to ground or open on this circuit, but your issue is intermittent.

The wiring diagram shows two separate 5V feeds from the PCM on Yellow/Pink and Pink/Yellow wires (See attached Diagram 3).

I recommend monitoring the 5V on each circuit while moving the harness.

Monitor the 5V on pin one at the PPS with the A/C Pressure Transducer unplugged on the Pink/Yellow wire.

Then on the Yellow/Pink wire monitor, the 5V at the Line Pressure Transducer with the Exhaust Pressure Sensor is unplugged (as you mentioned, it should be already unplugged).

I think that if either of the two 5V feeds is intermittently open or shorted to the ground, you will have the dead pedal along with the P06D3 trouble code.

The hard part is creating the issue where the 5V signal is lost, and the trouble code won’t clear.

I hope this information helps; please keep us posted.

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[Pilsnr]

I think I found it.

This connector off the main harness was lying on top of the exhaust pipe, burnt through the hard plastic, and started to burn what looked like a pink wire.

Luckily it hadn’t entirely burned through the wire yet.

I’ve put electrical tape on it and zip-tied it away from the exhaust pipe.

I hope this was the problem and it’s fixed.




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[Pilsnr]

Which also would kind of explain why it was intermittent.

It seemed like after hitting a good bump is when I’d lose throttle.

So I think when I’d hit a bump, the bare wire would hit the metal of the exhaust pipe and cause a short and send the low voltage reading to the PCM.

I hope this was the case anyways.


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[AK Bob]

I think I found it.

This connector off the main harness was lying on top of the exhaust pipe, burnt through the hard plastic, and started to burn what looked like a pink wire.

Luckily it hadn’t entirely burned through the wire yet.

I’ve put electrical tape on it and zip-tied it away from the exhaust pipe.

I hope this was the problem and it’s fixed.



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Congratulations!

It looks like you found it.

You could verify by checking the voltage to ground on that exposed wire.

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[Pilsnr]

Congratulations!

It looks like you found it.

You could verify by checking the voltage to ground on that exposed wire.

Thank you, Bob, for your time.

I think I’m done crawling around under the truck.

I think I’ll go for a little ride to verify.


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[Pilsnr]

The throttle seems to be fine now.

Drive 20 miles and no problem.

I stopped for fuel and now I’m getting service electronic braking system and the traction control light.


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[AK Bob]

The throttle seems to be fine now.

Drive 20 miles and no problem.

I stopped for fuel and now I’m getting service electronic braking system and the traction control light.


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Any trouble codes?

You may need a scan tool capable of reading the ABS module.

Could be an issue with the ABS module or Wheel Speed Sensor.

Strange that it happened right after finding that melted connector.

I am assuming there was only the one exposed wire and you insulated it.

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[Pilsnr]

Any trouble codes?

You may need a scan tool capable of reading the ABS module.

Could be an issue with the ABS module or Wheel Speed Sensor.

Strange that it happened right after finding that melted connector.

I am assuming there was only the one exposed wire and you insulated it.

Yes sir, only one exposed wire.

Just double checked.

Strangely enough when I start the truck it will show the service electronic brake system on the dash screen but when I use the menu to look for the stored error code it only says back up light out which has been that way since I changed to led bulbs years ago.

The brake error code goes away and I’m only seeing the traction control light.


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