TekMan05

Hey guys, I know this is on the Stang forum but I can't find any answers elsewhere. I been fighting with a Code for a while now P1309.

P1309 FORD - Misfire Detection Monitor Not enabled.


Possible causes

- Faulty Camshaft Position Sensor
- Synchronize Assembly not properly installed.
- Verify the cam sensor is synchronized
- Faulty Powertrain Control Module (PCM)
- Verify input sensor parameters are correct
Help with this

Tech notes

Replacing the Camshaft Position Sensor (CMP) usually takes care of the problem, but if the sensor is installed out of synchronization it will produce the P1309 code. If the CMP is installed properly, REPLACE Powertrain Control Module (PCM). RESTORE vehicle. RERUN Quick Test .


Help with this

When is the code detected?

Powertrain Control Module (PCM) disabled the misfire monitor

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

P1309 FORD Description

Misfire Monitor Disabled When the misfire monitor is disabled, usually due to the input signal generated by the camshaft position (CMP) sensor, by sensing the passage of teeth from the CMP wheel.


Read more: http://helpforcars.net/obd_codes/p13...#ixzz2mB1auatf

Now my truck has a rebuilt 5.0 with a new cam, head an lower intake work, and a few other things. Nothing extremely drastic. This CEL didn't start for a while after the build. Nothing I do will make it stay off. I have an SCT tune for it as well. I've got MSD coils on it but this started when I had OEM coils on as well. I replaced the cam syncro AND used the alignment tool AND had the engine at TDC. Still doing it. Also noticed my MPG has took a sharp dive as of late too. Anyone have any advice on this? It runs fine overall. No real noticeable misses or back fires. Sometimes I notice a hiccup on hwy cruising but I Don't know if that's a slight miss or a hiccup in the tuning for the transmission. Here's a video link to one of my videos that shows all my mods. Thanks !

mjr46

Disconnent the dpfe sensor and drive it around . See if the same code would be trigger. If no 1309 does not return i would replace it. DPFE sensor is known to be internally shorted and causeing a electric interence with cam signal. There would be a code related to the dpfe sensor but what ya actaully checking for is if the 1309 does not trigger good luck.


if the DPFE is metal then this is probably the problem.If disconnecting DPFE causes the 1309 code to go away make sure that you get a plastic replacement.

this was common on the v-6 explorer can't remember if the 5.0 has the dpfe but if it does try the above

TekMan05

So I tried doing that and resetting the battery. To no avail the 1309 code returned about 25 miles later. Still stumped on why this keeps persisting. There's a small mechanic shop by my girlfriend's and she told me that they have a high end scan tool. Do you think that would be able to pinpoint the exact cause of why the code keeps triggering?