MISFIRE DETECTION MONITOR HARDWARE P1309

P0300 Random/Multiple Cylinder Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected P0305 Cylinder 5 Misfire Detected P0306 Cylinder 6 Misfire Detected P0307 Cylinder 7 Misfire Detected P0308 Cylinder 8 Misfire Detected P0309 Cylinder 9 Misfire Detected P0310 Cylinder 10 Misfire Detected P0311 Cylinder 11 Misfire Detected P0312 Cylinder 12 Misfire Detected P0313 Misfire Detected with Low Fuel P0314 Single Cylinder Misfire (Cylinder not Specified) P0315 Crankshaft Position System Variation Not Learned P0316 Misfire Detected On Startup (First 1000 Revolutions)

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P2195 O2 Sensor Signal Stuck Lean Bank1 Sensor 1 P2196 O2 Sensor Signal Stuck Rich Bank1 Sensor 1 P2197 O2 Sensor Signal Stuck Lean Bank2 Sensor 1 P2198 O2 Sensor Signal Stuck Rich Bank2 Sensor 1

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well..fuel injection systems are more than the electronic part. I suspect you are dealing with compression or injector fouling issues..

Need to get a can of gumout and with it idling spray around the top of the upper plenum to see if you have a vacuum leak if you have a leak it will either idle up slightly or kill the engine very very common on the 3.0 Taurus ,little more information would be helpful like how many miles are on the car

code p 0306 is misfire detected no 6 cylinder causes electrics
more likely a bad injector , injector wiring or dirty tip

Get an older car with less computers running it. Sorry I can't be of any real help. I just wanted to a bit smart-elec.

P0304: Cylinder Misfire Detected (#4)

-Last number corresponds to which cylinder is misfiring.


Could be a faulty spark plug or wire. Try changing the spark plug from the 4 Cylinder to another and see what happens; If the different cylinder misfires, then it is the spark plug. If not, it could be the wires on cylinder 4.

P1309--Misfire Monitor Disabled

When the misfire monitor is disabled,usually due to the input signal generated
by the camshaft position sensor

Possible Cause---

Cam Position Sensor
Powertrain Control Module
ETC,MAF,CKP

Verify CMP is installed correctly


You need a local repair shop to check it out

The definition of this code is:
P1309 Engine Misfire Detection Monitor not enabled

It's a problem with the detection circuitry, not a detection of a engine misfire condition. I found this quickly on the net:
Diagnostic Trouble Code (DTC) P1309 indicates Misfire Detection Monitor is not enabled.

Breakout box installed, PCM disconnected. Connect digital multimeter between PCM test pin 85 and test pins 51 or 103. Bump engine in short burst with the starter without starting engine for at least 10 engine revolutions. Answer this question: Does digital multimeter reading switch between low (less than 2.0 volts DC) and high (greater than 8.0 volts DC)?

If Yes, Verify correct installation by referring to the Powertrain/Engine Group in the Workshop Manual. If the CMP is installed properly, REPLACE PCM. RESTORE vehicle. RERUN Quick Test.

If no, REPLACE CMP sensor. RESTORE vehicle. COMPLETE Misfire Monitor Repair Verification Drive Cycle. RERUN Quick Test.

The CMP sensor is the Camshaft Position Sensor.

The misfire is detected by the misfire monitor as a slight change in engine speed which the PCM calculates back to a particular cylinder. The monitor is active continuously, but associates problems into 3 types. Two of the types are monitored on successive trips. The first trip the monitor detects a misfire it sets a pending code but not the MIL light. If on the second trip the same problem occurs the DTC code is set as current problem and sets the MIL light on. The MIL will stay on untill the DTC is deleted. The remaining type is a most sever case and signals the possibility of cat damage. In this case the misfire monitor identifies the problem and the PCM determines it to be severe and immediately sets the DTC as current and the MIL light to flash at a rate of 1 per second until the condition is no longer present, at which time the MIL stays on steady.

So once the P0301 is set it never turns off, except by code deletion procedure.

I think a lean burn condition could cause a misfire, but probably not from a PCV problem which should affect all cylinders equally. There would likely need to be another problem with that cylinder or intake or ...... .

Assuming the plugs and wires have been changed. I would look at the bottom of the coil pack. They tend to crack and short out.

Or if it's got coil packs they will also crack and short out.