Sensor in head above...

[Waterloo]

Hey guys, just replaced my Camshaft speed/positioning sensor, she was throwing codes, so I installed a new one. Above the Camshaft sensor, on the driver side of the head on the CM-871 is another sensor, what is it? I wish I would have known there was another sensor buried in there as I would have replaced it too.

[Hammerhead]

I'm not 100% sure where your talking about Waterloo, but would it not be the secondary or backup cam position sensor?
I know the crank has a backup, and I believe the cam does as well.

Edit to add:
Just looked on QS, and in procedure 019-363 is states in the Remove instructions to remove the "Engine Speed Sensor from the cylinder head". I believe this is what you may be referring to.

[Waterloo]

Well, I don't know? There are two? The one I replaced was just off center of the head, next to the ECM. There were two sensors there behind the rats nest of cabling. I replaced the lower one with the metal tab. I looked on QuickServe, it showed the sensors but DID NOT show where they go in either the block or head.

[Hammerhead]

I'm pretty sure I'm wrong and there is NOT two.
Procedure 100-002 is the sensor drawing diagram...which one?
I can't seem to find the cam position sensor on that, please point it out.

[Waterloo]

That is it Hammer, the one I replaced. What is directly above it, there is another sensor there.

On Edit...

No, that is not the one I replaced, that one looks like the one above. Maybe there are two?

QS is giving me fits, I cannot find that procedure on mine.

[Waterloo]

Allright, I think this is it... 4921517 Pressure Sensor

Here is a link to a photo of the one I replaced, https://www.aliexpress.com/item/Genuine-....26.EAV26d which was the Camshaft Positioning Sensor. The one above it in the head looks to be a pressure sensor of some sort.

[Hammerhead]

(06-13-2017 )Waterloo Wrote:  Allright, I think this is it... 4921517 Pressure Sensor

Here is a link to a photo of the one I replaced, https://www.aliexpress.com/item/Genuine-....26.EAV26d which was the Camshaft Positioning Sensor. The one above it in the head looks to be a pressure sensor of some sort.

4921517 Is the oil pressure sensor, according to my parts breakdown list.
And it's in the block, not the head.

[Waterloo]

Well, it looks like that. I just replaced the oil pressure sender, in the block, so I don't know what I found. But, the truck is running quite a bit smoother, so the new sensor helped. The old one was just about shot, O ring was about gone. I'll see if I can figure this out. Not having much luck with QS tonight.

[Hammerhead]

Quickserve->Parts->Option View->enter PH1802-08 in the search->click on the blue option detail

You replaced #31, the backup position sensor according to the breakdown list, I believe you are referring to #33 P/N 4921600.