Thread: Code # 0401
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  #21  
Old 06-10-2009, 11:50 PM
RONinTORONTO RONinTORONTO is offline
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Join Date: Jun 2009
Location: Toronto
Vehicle: 1998 FORD F150
Posts: 3
Quote:
Originally Posted by wizkid1358 View Post
I know this is an old thread, but if your truck has an aluminum sensor, only use the Aluminum one (Tomco or motorcraft). The new plastic ones may appear better but they use different technology and put out a different signal voltage which is lower than the good ones which will cause the code to come up again. For me I bought the truck used ('97 f150 4x4 4.6L VIN code 6) and it came with the plastic sensor and had the EGR insufficient code, so I went Autozone and bought the sensor but still had the code. I have now completely replaced the EGR system (EVR, EGR Valve, tube, vacuum line, and hoses going to the sensor) and still have the code. Bought the Tomco 10906 and that solved the problem.
I just received a Tomco 10906 and it is plastic! I measured the voltage out (top pin) to ground (middle pin) with zero pressure differential. I read 1.0 volts, which is correct according to Tomco techtips issue 35. The plastic one on the truck now only reads 0.2 volts with zero pressure difference. (way out of spec). I checked with a FORD dealer and they had a plastic one in stock as well! I'll give the new Tomco plastic one a try and see what happens. By the way, the metal body one only puts out 0.5 volts at zero pressure difference according to Tomco.
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