TPS problems - Ford Powerstroke Diesel Forum
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Old 01-25-2014, 05:05 AM
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TPS problems

Hello to all, new to site. I have a 2002 super duty 7.3 that idles like a champ but intermittently will respond to the pedal, I have changed the pedal assembly with some success but it still does it. the code that I get is PO221 I have read a lot of the forums and found that everything seems to point back to the sensor. Is there anything else that would cause the senor to fail or get false readings? Any help would be greatly appreciated.
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Old 01-30-2014, 02:26 PM
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a bad icp sensor can cause similar symptoms, and a lot of times it wont throw a code. my buddy has a 2003 7.3 that was doing that and it ended up being the icp.
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chinsquirrel (02-01-2014)
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Old 01-30-2014, 04:15 PM
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Have you looked at the OD switch wires? It would be worth checking, it's a common failure you might want to get an early fix on. The TPS shares the power with it and while just starting to fail it can draw-down the circuit and give you TPS issues.

It may not have gotten to the point where it blows the fuse yet, but here's a good link to look at....

https://b7445ba3-a-62cb3a1a-s-sites....attredirects=0
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chinsquirrel (02-01-2014)
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Old 02-01-2014, 03:29 AM
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Thanks, I did look at the wires real fast, it has been cold as heck, it warmed up this week so I will look at them better. got to get it fixed sucks not having my truck. I did read that the ICP sensor could be the problem also and if you un-plug it will default to the factory setting and then the should be able to tell if it is working. I will check that as well today.

Last edited by chinsquirrel; 02-01-2014 at 03:34 AM.
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