Throttle position sensor faults, throwing wrench light
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
Throttle position sensor faults, throwing wrench light
I had the wrench come on a week ago when I was camping, decreased throttle, pulled code and said throttle position sensor voltage correlation from d to f. Cleared code out and was okay, till today. Wrench light came on, almost no throttle response unless I floored it then only enough to get going. Pulled codes and it said all three sensors were out of voltage correlation. Limped it back to my shop, ordered a pedal assembly from Napa, installed it, cleared codes, and all is fine when I start it and idle, as soon as I touch the pedal the wrench pops on and code is, I believe d to e correlation, I forgot already, but only the one sensor code now. I can look at it with my snap on scanner and see that the app percents do change with throttle input, but I don't know if the numbers are correct. I'm hoping someone has ran across this and may be able to help me out, my next step is to throw a pcm at it, I just don't know enough about these diesels to track it down.
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
I just went out and did some reference volt chasing. I found at the icp and egr plugs only getting 4.2 volts, sometimes fluctuates lower, pulled ebp plug and has 5 steady volts, I then get 5 volts to egr and icp. So would this mean that the sensor is bad, or could it still be wiring? I would think a bad sensor of it sends 5 volts to other sensors when unplugged, but not certain on that.
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Mountain Pass
Joined: Jul 2009
Posts: 168
Likes: 4
It's an 06, I went ahead an took the sensor and tube off to check it out, all clean. I just did head studs last November and cleaned it out then. I did notice that I lost the oring for.the ebp pigtail, and there was some corrosion on the brown wire. I cleaned it up the best I could as it was getting dark, and I ran out of time to re check the volts going to egr and icp, but when I got it back together and went for a ride, no wrench and it ran better than it has in awhile. I noticed after I put the throttle pedal on it was running better also, even with the one code for it.
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Mountain Pass
Joined: Jul 2009
Posts: 168
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I did remove the ebps and tube, it was clean, I cleaned the ebp pigtail and sensor pins, had a little green on the brown wire. I lost the oring for the pigtail sometime so I imagine that was the problem, cuz so far no more codes. I will be getting a new pigtail for it, thanks for the help again fellas
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Fleet Owner
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As an fyi - Circuit 351 (5 volt reference; brown wire with white stripe) has connectivity to the following sensors:
EBP
ICP
EGR valve actuator
Acclerator Pedal Position sensors
MAP
Baro
EBP
ICP
EGR valve actuator
Acclerator Pedal Position sensors
MAP
Baro
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