Need Help with check engine light
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Need Help with check engine light
So a month and a half ago my check engine light came on my 05 F150 v8 5.4 to a Friend to have the truck scanned the only codes that the scanner showed wore po349 and po345 so my friend the mechanic said to replace the 2 cam position sensor so i did I bout them at Napa but the check engine light won't go off even after erasing the codes I still coming on so I did some research and theirs a couple of things I have narrowed it to installing a new alternator or replacing the the 2 Vct phasers but what has me confused is that the truck runs and performs good the engine seems to be working just fin the only thing I do notice is when the truck is parked I and. Idling it does idle a tad rough but nothing major
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I was going to say alternator also, the po349 is CAM POSS CIR INTER 2, its kinda common on stangs but when it happens the light wants to act a nut dealership will tell you its the alt.. once changed out problem solved... hope this helps ya
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Okay thanks that's what I was thinking to do I have a trip to Mexico I guess if it's charging at the moment the light can stay on *** soon *** I get back I'll have the dealer take a look at it thanks
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From: HaWaII
I have that on my truck... Codes p0345 and p0349. Changed alternator.. Codes still there. Changed sensor... Codes still there. Swapped driver/passenger senors... Codes still there. Codes came on after changing driver side cam phaser. Truck runs and idles fine. Wires check out fine from CPS sensor to PCM connector.
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po345 Ford = Camshaft Position Sensor A Circuit Malfunction (Bank 2)
A code P0345 could mean one or more of the following has happened:
- a wire or connector in the circuit could be grounded/shorted/broken
- the camshaft position sensor may have failed
- the PCM may have failed
- there exists an open circuit
- the crankshaft position sensor may have failed
Possible Solutions
With a P0345 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
- Visually inspect all the wiring and connectors in the circuit
- Check for continuity in the circuit wiring
- Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor as required
- Check the crankshaft position circuit as well Replace circuit wiring and/or connectors as required
- Diagnose/replace the PCM as required
----------------------------------------------------------------------------------
P0349 Ford = Camshaft Position Sensor 'A' Circuit Intermittent Bank 2
Possible causes
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Variable Cam Timing (VTC) Solenoid
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
Tech notes
Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.
When is the code detected?
The camshaft position sensor signal sent to the Engine Control Module(ECM) is intermittent
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0349 Ford Description
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
Hope this helps in some way I went thru some CDs and tech stuff bout all I could come up with on OBD and ENGINE codes.. basically in a nut shell it is telling me you have an open circuit somewere
A code P0345 could mean one or more of the following has happened:
- a wire or connector in the circuit could be grounded/shorted/broken
- the camshaft position sensor may have failed
- the PCM may have failed
- there exists an open circuit
- the crankshaft position sensor may have failed
Possible Solutions
With a P0345 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
- Visually inspect all the wiring and connectors in the circuit
- Check for continuity in the circuit wiring
- Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor as required
- Check the crankshaft position circuit as well Replace circuit wiring and/or connectors as required
- Diagnose/replace the PCM as required
----------------------------------------------------------------------------------
P0349 Ford = Camshaft Position Sensor 'A' Circuit Intermittent Bank 2
Possible causes
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Variable Cam Timing (VTC) Solenoid
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
Tech notes
Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.
When is the code detected?
The camshaft position sensor signal sent to the Engine Control Module(ECM) is intermittent
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0349 Ford Description
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
Hope this helps in some way I went thru some CDs and tech stuff bout all I could come up with on OBD and ENGINE codes.. basically in a nut shell it is telling me you have an open circuit somewere
Last edited by VaOutlaw; Dec 10, 2013 at 11:44 AM.
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I have that on my truck... Codes p0345 and p0349. Changed alternator.. Codes still there. Changed sensor... Codes still there. Swapped driver/passenger senors... Codes still there. Codes came on after changing driver side cam phaser. Truck runs and idles fine. Wires check out fine from CPS sensor to PCM connector.
Thread Starter
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Junior Member
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po345 Ford = Camshaft Position Sensor A Circuit Malfunction (Bank 2) A code P0345 could mean one or more of the following has happened: - a wire or connector in the circuit could be grounded/shorted/broken - the camshaft position sensor may have failed - the PCM may have failed - there exists an open circuit - the crankshaft position sensor may have failed Possible Solutions With a P0345 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: - Visually inspect all the wiring and connectors in the circuit - Check for continuity in the circuit wiring - Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor as required - Check the crankshaft position circuit as well Replace circuit wiring and/or connectors as required - Diagnose/replace the PCM as required ---------------------------------------------------------------------------------- P0349 Ford = Camshaft Position Sensor 'A' Circuit Intermittent Bank 2 Possible causes - Faulty Camshaft Position Sensor - Camshaft Position Sensor harness is open or shorted - Camshaft Position Sensor circuit poor electrical connection - Variable Cam Timing (VTC) Solenoid - Faulty starter motor - Starting system circuit - Dead (Weak) battery Tech notes Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code. When is the code detected? The camshaft position sensor signal sent to the Engine Control Module(ECM) is intermittent Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) - Lack/Loss of Power - Engine Stall P0349 Ford Description The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor. When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change. When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals. Hope this helps in some way I went thru some CDs and tech stuff bout all I could come up with on OBD and ENGINE codes.. basically in a nut shell it is telling me you have an open circuit somewere
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From: HaWaII
po345 Ford = Camshaft Position Sensor A Circuit Malfunction (Bank 2)
A code P0345 could mean one or more of the following has happened:
- a wire or connector in the circuit could be grounded/shorted/broken
- the camshaft position sensor may have failed
- the PCM may have failed
- there exists an open circuit
- the crankshaft position sensor may have failed
Possible Solutions
With a P0345 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
- Visually inspect all the wiring and connectors in the circuit
- Check for continuity in the circuit wiring
- Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor as required
- Check the crankshaft position circuit as well Replace circuit wiring and/or connectors as required
- Diagnose/replace the PCM as required
----------------------------------------------------------------------------------
P0349 Ford = Camshaft Position Sensor 'A' Circuit Intermittent Bank 2
Possible causes
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Variable Cam Timing (VTC) Solenoid
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
Tech notes
Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.
When is the code detected?
The camshaft position sensor signal sent to the Engine Control Module(ECM) is intermittent
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0349 Ford Description
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
Hope this helps in some way I went thru some CDs and tech stuff bout all I could come up with on OBD and ENGINE codes.. basically in a nut shell it is telling me you have an open circuit somewere
A code P0345 could mean one or more of the following has happened:
- a wire or connector in the circuit could be grounded/shorted/broken
- the camshaft position sensor may have failed
- the PCM may have failed
- there exists an open circuit
- the crankshaft position sensor may have failed
Possible Solutions
With a P0345 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
- Visually inspect all the wiring and connectors in the circuit
- Check for continuity in the circuit wiring
- Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor as required
- Check the crankshaft position circuit as well Replace circuit wiring and/or connectors as required
- Diagnose/replace the PCM as required
----------------------------------------------------------------------------------
P0349 Ford = Camshaft Position Sensor 'A' Circuit Intermittent Bank 2
Possible causes
- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Variable Cam Timing (VTC) Solenoid
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
Tech notes
Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.
When is the code detected?
The camshaft position sensor signal sent to the Engine Control Module(ECM) is intermittent
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P0349 Ford Description
The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
Hope this helps in some way I went thru some CDs and tech stuff bout all I could come up with on OBD and ENGINE codes.. basically in a nut shell it is telling me you have an open circuit somewere
Thanks. A lot of good info and things to check. My next check is the crankshaft position sensor.
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Joined: Dec 2013
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ok here is more tech info... but the second piece i found below it seems a lil different and sounds like a quick check.. ... I know trouble shooting suxs especially with a problem ya can't find... being as I never have had to do a sensor/phaser change yet I am asking myself .. "does oil get to these sensor that are being replaced".. if so I can understand this techs answer if not I got no clue were he got his answer from..
OK Another Answer ... #1
Having fought a P0345 recently and P0349, may give extra insight. Per Ford hotline.
Min oil psi hot has to be above 25 psi for the phaser to work properly. The code stands for circuit problem but base engine can also set code. The 5 blades that go past the cam sensor cannot be bent. If oil psi to the head is low it may sound like and exhaust noise on startup after 10 min sitting hot. 1 pin should have continuity to the other connector with both disconnected. The orange wire should have continuity to pin 44 in the rh -when facing pcm-connector.It cannot be shorted to the shield. After clearing the code it will reset after 2 restarts if fault is still present. A single coil on 1 of the 8 plugs can be causing a frequency problem setting the code. Disconnect 1 at a time and try restarting 2 times after each clearing of the code unless you have a scope to stress test the coils. If you have a miss or phaser noise fix the obvious 1st as the cmp will not cause the miss at and idle.
Another and interesting Answer ... #2
remove the oil sending unit sitting behind the oil filter; it will be the single wire terminal. screw in manual oil pressure guage and note the oil pressure at cold idle,warm idle, and 2500rpm. compare to required specs or take my advice: replace the oil pump to get adequate flow pressure to the VCT actuators.
The p0349 is due to good pressure at cold idle.
The p0345 is due to steady poor pressure at operating temp.
OK Another Answer ... #1
Having fought a P0345 recently and P0349, may give extra insight. Per Ford hotline.
Min oil psi hot has to be above 25 psi for the phaser to work properly. The code stands for circuit problem but base engine can also set code. The 5 blades that go past the cam sensor cannot be bent. If oil psi to the head is low it may sound like and exhaust noise on startup after 10 min sitting hot. 1 pin should have continuity to the other connector with both disconnected. The orange wire should have continuity to pin 44 in the rh -when facing pcm-connector.It cannot be shorted to the shield. After clearing the code it will reset after 2 restarts if fault is still present. A single coil on 1 of the 8 plugs can be causing a frequency problem setting the code. Disconnect 1 at a time and try restarting 2 times after each clearing of the code unless you have a scope to stress test the coils. If you have a miss or phaser noise fix the obvious 1st as the cmp will not cause the miss at and idle.
Another and interesting Answer ... #2
remove the oil sending unit sitting behind the oil filter; it will be the single wire terminal. screw in manual oil pressure guage and note the oil pressure at cold idle,warm idle, and 2500rpm. compare to required specs or take my advice: replace the oil pump to get adequate flow pressure to the VCT actuators.
The p0349 is due to good pressure at cold idle.
The p0345 is due to steady poor pressure at operating temp.
Last edited by VaOutlaw; Dec 14, 2013 at 09:36 PM.