FTP Sensor P0452

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Oct 18, 2014 | 01:57 AM

WB4IUY

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Mountain Pass

Joined: May 2014

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FTP Sensor P0452

I'm getting a p0452 fault on my 2002 Escape 3.0 V6 2WD. From what I've read, that seems to indicate low FTP signal below .22v. As I understand it, the FTP sensor has 5 v applied, and the output to the ECU goes down as tank static pressure increases. Conversely, I think the voltage back to the ECU goes up as tank static pressure decreases (for the vacuum leak test measurement).

Does anyone know what the approximate voltage is at atmosphere (engine not running, vent valve open, etc)?

I'm guessing the "less than .22v minimum" signal back to the ECU might look more like either the signal wire shorted to the frame somewhere or the signal wire open (maybe corrosion in the connector)....

Also, does anyone know where the FTP sensor is located on the Escape and how to access it?

Thanks,
Dave

Nov 16, 2014 | 05:44 PM

danvhp

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Joined: Oct 2014

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I have the same DTC on my 2002 Escape. I have researched the problem and found that it is common for the sensor to go bad. But, I would check the wiring and voltages before damning the sensor. It is located under the rear seat on the drivers side. There is an access panel under the seat that can be removed to get to it. The new sensor comes with new hoses on each end. You can find it on Ebay. Search for "http://www.ebay.com/itm/381013082921?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT". About $90 to buy it with free shipping.

Nov 16, 2014 | 08:17 PM

WB4IUY

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Mountain Pass

Joined: May 2014

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I gained access to the sensor and checked the output at the connector. There was no output from the sensor when measured in the harness. I removed the connector from the sensor and found a bunch of crud. I cleaned the connectors, applied a little electrical grease to try and prevent future oxidation, and reconnected it. I then had a signal at about 2.75 vdc to the ECU. I reset the fault and all has been well for about 1000 miles so far.

Dave

Nov 26, 2014 | 04:35 PM

danvhp

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Joined: Oct 2014

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I wish I would have been so fortunate to only have to clean the connector on my Escape. My sensor was bad. $100 later and my check engine light is off for now.