Code P2107, location of crank sensor needed

JAMESM79

MEMBER
2011 FORD F-150
5.0L
V8
4WD
AUTOMATIC
210,000 MILES

Truck started cranking longer to start, then just cranked. Fuses are good, put in new fuel pump, fuel drive module, new throttle body and throttle positioning sensor, giving 2 codes P2107, and the other was a thermostat replacement, which it was doing before it quit running. I'm looking at the crank sensor cause I don't know what else to try.

3 Replies

SEVAG P

MECHANIC
405 POSTS

Hi,

Crank sensor location is at the rear of the engine passenger side check fig(8).but you don't have fault code related to crank sensor.
Refer to fault code p2107 check fig (1)as a first step wiring between throttle body and engine control unit must be checked for short to B+ and B-. throttle body is already replaced as you mentioned. visually check throttle valve connector if wires overheated or sticked to each other, check for any sign of corrosion. check fig2,3,4 for wiring between throttle and engine control unit.

here is the link below for the procedure on how to check the wiring:

https://www.2carpros.com/articles/how-to-check-wiring

As the wiring diagram check for resistance and short circuit, check the wire between throttle valve connector pin 1 to engine control unit pin 68.and pin2 of throttle valve and engine control unit pin 67.
Fig 5 and fig 6 is the engine control unit connector and how it looks like, fig 7 is the location of the engine control unit.
Perform the wiring test and please get back to us with your results.
Thank you.

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Friday, January 15th, 2021 AT 5:28 AM

JAMESM79

MEMBER
2 POSTS

Thank you for your response. I know the crank sensor was not part of the code it was giving but I tried it by recommendation, I had found the location of the crank sensor before your reply, I changed it out but it did not fix it. I tested the wires you recommended for short and resistance. I stripped the wires as close as I could to the connectors, there was no shorts in either wire. With the ignition switch off, I had tested pin 1 and pin 68, it read 0.3 to 0.4 ohms, pin 2 and pin 67 it was a solid 0.5 ohms, all connectors and wires looked good, no burns, corrosion. I await your reply. Thanks again.

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Friday, January 15th, 2021 AT 5:30 PM

SEVAG P

MECHANIC
405 POSTS

Hi again,

To be at the safe I need you to check the voltage at throttle valve connector between pin 5 and pin 4 you must get about 5 volts ignition on.
Also check the resistance of the other wires between throttle valve and engine control unit.
Throttle pin5 to cupin9.
Throttle pin 6 to cu pin 10.
Throttle pin 4 to cu pin 8.
Throttle pin 3 to cu pin 34.
If all the wires are good, throttle valve was already replaced then it seems engine control unit defected.
Let us know what happens with you.
Thank you.

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Saturday, January 16th, 2021 AT 1:57 PM