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Old 08-11-2009, 02:41 PM   #1
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Map sensor and TPS location

Hi, Im throwing an engine code for low input on map sensor and TPS sensor, I cant seem to find any free repair manuals online for the focus. Can someone help me locate these im thinking about pulling them from the junk yard tomorrow. thanks


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Old 08-11-2009, 02:52 PM   #2
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the tps should be on the throttle body
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Old 08-11-2009, 02:53 PM   #3
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What are the codes you're getting?
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Old 08-11-2009, 03:14 PM   #4
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I dont remember the codes but i stopped by autozone to get it checked out. I lend my car to my parents for awhile and it had some problems when I got it back. It runs like crap right now, bogs like crazy. There were multiple engine codes but the guy at autozone told me these 2 were likely causing the other codes to go off.
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Old 08-11-2009, 04:46 PM   #5
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This pic is a general overview. TPS is in the upper left, and MAF is in the lower right.


This is a close up of the TPS, on the throttle body.


This is the MAF, buried down low.
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Old 08-11-2009, 05:23 PM   #6
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You should go back to Autozone, read the codes again, and then come back here and let us know what the code numbers are. You can also double check the code in our DTC code guide in the "Technical Chat Stickied Threads" at the top of this forum.

Autozone guys are there to sell you parts, so if the code actually says "MAF sensor self test fail, or possible incorrect TPS reading" then they will sell you both parts- neither of which you can return if it doesn't work. You should not trust these guys, or even the code scanner. The code scanner is a diagnosis tool, not something that points out the exact problem. You still have to interpret the codes, and then test the parts, if possible, yourself. Your whole problem with these codes could be a loose air intake, and replacing both parts would not solve the problem. Then you'd be out more money, and on your way to a shop to have the car sit there until you pay what they say you have to pay.

Oops, I just saw it was a low input code supposedly, anyway, if this were my car, I'd be tracing down the wiring harness for the first connector I could find on both of those, then unplug it, clean the pins with an old toothbrush, then put di-electric grease on the connections and plug it back in. I'd also inspect that wiring harness for physical damage.
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Old 08-11-2009, 06:35 PM   #7
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> I'd be tracing down the wiring harness for the first connector I could find on both of those, then unplug it, clean the pins with an old toothbrush, then put di-electric grease on the connections and plug it back in. I'd also inspect that wiring harness for physical damage.


X2.

It is suspicious that both the MAF and the TPS are showing out-of-range readings, and the problems both seem to have appeared simultaneously..
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Old 08-11-2009, 10:04 PM   #8
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Whoa great pics. Thanks for the input guys. I had a leaking battery with battery acid on the wires i looked at it briefly but ill take another look and clean it.
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