P0340 Ford Ranger

2001 Ford Ranger XLT / 3.0L with 2 wire camshaft sensor

I watched scannersdanners video on youtube with my same exact truck and camshaft sensor. My camshaft sensor signals are good and the wiring is good. I have read discussions and watched videos that discuss that the alternator can cause this code to trigger if there is noise on the ac voltage that it produces. I tested the diodes / rectifiers and AC voltage coming from the alternator and all appear to be within specifications. Has anyone heard of this issue and what are your thoughts. Also any another suggestions to resolve this code would be appreciated.

Is the code intermittent, or does it reset immediately? Has the phaser been replaced already?

code is hard set. If cleared it will come right back. Not sure what you mean by phaser.

Sorry, the CMP sensor. :lol: Ford calls it a cam phaser, or synchronizer.

If you're 100% confident in the wiring and the sensor, then the only thing left is the timing of the CMP signal to the CKP signal. It's unlikely that the timing gets off on its own, which is why I wondered if the sensor had been replaced. Do you have access to a two channel scope?

I do not have access to scope anymore. Was more curious about the computer setting this code if it was picking up noise on the ac output of the alternator. Do you have a link to procedure for checking the signals between the CMP and CKP? Would assume you would put one on each channel of a scope. Should they be in sync with each other. I may have access to scope in future.

Well if your worried about the alternator causing the issue couldn’t you just unplug the alternator and remove the battery cable from it start it up and check for a minute

Ty. I did this today and light did not come back on. Still digging a little deeper though.

OK so I got the following from a scope of camshaft and crankshaft signals and from what information I found it appears I am off alot. From what I understand the 2 signals should intersect in the middle of the camshaft sine wave on the 8th upswing of the crankshaft after the missing tooth signal. Does this sound correct for an 2000 Ford Ranger 3.0? Would adjusting / rotating the camshaft body be the proper way to correct this? Also any suggestion on how to tweak scope settings would be appreciated. See Link below for scope results.

Ford Ranger Cam and Crank Signal

appears you are off a little. You rotate the bottom part to adjust it. They also make tools for your alignment or you can watch your scope and try to match it up to the waveform.
www.amazon.com/Spectra-Premium-TK01-Sync...J9W8FEN51BYMMP78RTPA

Thank you I will give this a try today. On your picture of the scope what is the yellow signal indicating?

i believe its ignition coil current.

Solution was to remove the synchronizer and move clockwise until it seated in. I believe a 1l4 turn. When i initially moved a 1l4 turn counterclockwise the scope showed intersection of signals around the 24th rise of crankshaft. When i started it was around the 16th rise. It is know properly on the 8th rise. Camshaft sensor can be tweaked but connector should roughly be at 38 degrees from center, pointed towards passengers side. Truck is now shifting super smooth. Hesitation and bucking gone. Fingers crossed MPG improves. Ty all for your help.