Throttle pedal sensor
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New User
Joined: Sep 2006
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From: North Alabama
Throttle pedal sensor
My throttle pedal sensor is going bad. This is the third one installed in two years. The current one starting malfunctioning after approximately 3,000 miles. Even though this one will be replaced under warranty, as was the last, it is getting to be a hassle. Does anyone have any sugestions as to what might be causing these units to fail repeatedly?
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New User
Joined: Sep 2006
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From: North Alabama
Symptoms usually begin with engine surges at lower RPMs. When holding the accelerator pedal steady the RPM varies as though the pedal was being patted. This usually gets progressively worse and more difficult to maintain a steady RPM. The symptoms finally get to the point the accelerator no longer functions. On one occasion I pulled into traffic, mashed the pedal and got no response, I finally had to let off the pedal and floor it multiple times to get a response. Now, I take it back to the dealer for a new pedal assembly (warranty) before the symptoms get extreme. I really need to identify the root cause of this problem before my 1 year warranty expires.
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New User
Joined: Sep 2006
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From: North Alabama
Thanks guys. When the dealer replaces this pedal assembly I will ask for the codes they pull and ask for a check of sensors that may be affecting the pedal. One would think the dealer would have already begun diagnosing the cause rather than continuing to replace the pedal assemblies.
Senior User
Joined: Jan 2004
Posts: 205
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From: Houston, TX
Farmall,
I've got a similar problem and I found this TSB. I've done a lot of searching on this and hadn't found it until I looked in my Amacker "Tips & Tricks" book:
2002 Super Duty Trucks with Repeat Accelerator Pedal Codes:
Some trucks built prior to 12-1-01 may exhibit repeat AP or IVS codes -- P0122, P0123, P0221; after replacement of the accelerator pedal assembly. Check the harness at the accelerator pedal and driver side shock tower for chaffing or shorts, and the AP sensor connector for damaged or pushed out pins. Repair as needed. Broadcast Message 0512.
I'm going to do this on mine as it's been throwing SES codes and giving me a dead pedal intermittently. Hope this helps.
Craig
I've got a similar problem and I found this TSB. I've done a lot of searching on this and hadn't found it until I looked in my Amacker "Tips & Tricks" book:
2002 Super Duty Trucks with Repeat Accelerator Pedal Codes:
Some trucks built prior to 12-1-01 may exhibit repeat AP or IVS codes -- P0122, P0123, P0221; after replacement of the accelerator pedal assembly. Check the harness at the accelerator pedal and driver side shock tower for chaffing or shorts, and the AP sensor connector for damaged or pushed out pins. Repair as needed. Broadcast Message 0512.
I'm going to do this on mine as it's been throwing SES codes and giving me a dead pedal intermittently. Hope this helps.
Craig
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Originally Posted by Craig64
... after replacement of the accelerator pedal assembly. Check the harness at the accelerator pedal and driver side shock tower for chaffing or shorts, ...
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Joined: Jan 2004
Posts: 205
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From: Houston, TX
Farmall, if you've got a chip on your PCM check it for shorts or loose connections. I think I cured my problem that way. For some reason the chip was throwing an SES light and killing the throttle pedal.
Craig
Craig
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