Question about 2003 Ford Taurus

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03 Taurus with DTC P0340, P1336

My 2003 Ford Taurus is giving me a code of P0340 - CAM Position Sensor Circuit Fault. Secondary code of P1336 - Misfire Monitor Hardware. Anyone had a similar fault code and will changing the CAM Sensor correct? Or is this going to become one problem fix to find another?

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  • Anonymous Mar 25, 2014

    my truck dakota 3.7, I get error code p0344 and can not find her fault. they changed the sensor position someone can help me.

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I would think it would be just the Camshaft Position Sensor.I looked up the codes and they say pretty much the samething.


P0340 Ford Camshaft Position Sensor Circuit Malfunction


P1336 Ford Crankshaft/Camshaft Sensor Range/Performance












Posted on Jan 18, 2009

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Dtc po340 wont start put in new cam sensor still just cranks 42lbs fuel pressure at shrader valve has spark at plugs only code was po340 help


P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction ,did you check the wiring ?
P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction The test fails when the PCM can no longer detect the signal from the CMP sensor.
  • CMP circuit open
  • CMP circuit short to GND
  • CMP circuit short to PWR
  • SIG RTN open (VR sensor)
  • CMP GND open (Hall effect sensor)
  • CMP misinstalled (Hall effect sensor)
  • Damaged CMP sensor shielding
  • Damaged CMP sensor
  • Damaged PCM
Harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have intermittent impact on the CMP signal. DR1 DTC P0340: CHECK IF ENGINE WILL START
    Note: Refer to the Pinpoint Test Schematic to determine the type of CMP sensor.
  • Start engine.
Will the engine start? Yes No GO to DR2 . DTC P0340 is not the cause of the No Start. GO to Section 3 to diagnose the No Start symptom. Is the PCM firing the injectors ?
  • Starting Concerns:
    • No Start, Normal Crank
Note: Extended cranking because of a no start can load the exhaust system with raw fuel, damaging the catalytic converter after the engine starts. For applications with Secondary Air Injection (AIR) Systems, perform the following after the no start has been repaired: Disconnect the electric secondary air injection (AIR) solid state relay, run the engine until the surplus fuel is used up, and reconnect the relay (disconnecting the relay may set a Continuous Memory PCM DTC that will need to be cleared).


SYSTEM/COMPONENT REFERENCE (Section 5 Pinpoint Test unless noted)
  • Add-on Anti-Theft Devices
  • Visual, check with customer.
  • Fuel/Ignition
  • For LS6/LS8:
  • GO to KB85 .
  • All others:
  • GO to A1 .
  • If engine is now a no start:
  • If engine will start and run normally at part throttle, check Idle Air Control (IAC) System.
  • Engine will now start and run normally at part throttle:
  • GO to KE2
  • Exhaust System (restrictions)
  • GO to HF1
  • Base Engine
  • Engine System - General Information Section 303-00 of the Workshop Manual.
  • Additional Testing
  • GO to Z1

Oct 19, 2015 | 1998 Ford Escort

2 Answers

Why doesn't my '97 Ply. Grand Voyager 3.3 engine start after it sits awhile. Shows P0340 code. I have replaced the cam sensor and after the Van starts, it will run great all day long without any codes


DTC P0340: Camshaft position sensor A circuit (bank A). Probable cause:
1. The replaement sensor could be defective
2. Connector terminal contact dirty or corroded
3. Wire harness fault. Check for correct voltage, open, short to ground, short to voltage
4. Control unit software needs to be updated
5. Faulty PCM or ECM

Jan 30, 2015 | 1997 Plymouth Grand Voyager

1 Answer

P0340 Problem Code for 03 Jeep Liberty


code p0340 refers to cam shaft position sensora bank 1-circuit malfunction===causes --wiring Cam sensor---ECM. The only connection is the ECM to both units so they may have unpluged the ECM to service the air bag problem. IT could be as simple as using a code reader to reset the CPU. I may also be a coincedence and there may be a fault in the cam position sensor.. I would discuss the matter with the dealer service department to determine what is what.

Oct 23, 2013 | 2003 Jeep Liberty

1 Answer

Would a code po340 cause the transmission problems in a 1996 ford Taurus with a 3.0.


code p0340 in my fault code book refers to cam shaft position sensor a bank 1 circuit malfunction. If you have problems in the transmission and I assume it is an auto have a pressure test done on the unit to determine if a fault exists that is not covered in the cpu reporting system. Check the oil level is on the mark and not low or over full as both will cause problems.

Jun 02, 2013 | Cars & Trucks

2 Answers

Code error p0340


Hi there:
DTC P0340 - CMP (Camsahft Position) Sensor Circuit Malfunction

CHeck details HERE.

Apr 25, 2013 | 2000 Cadillac DeVille

1 Answer

I changed out the MAP sensor,and the idle air sensor on my 2006 Ford Taurus. This was before I had the fault code read at a dealer. Code came back as P0340, and P0430 Band 2 cat worn out. I had the cam...


P0340 FORD - Camshaft Position Sensor Circuit Bank 1 Sensor 1Possible causes- Faulty Camshaft Position Sensor
- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery
P0340 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.
P0430, main catalyst is worn out.

Dec 04, 2012 | 2006 Ford Taurus

1 Answer

Ford f350 crew cab super duty 7.3 diesel runs rough and turns off randomly while driving sometimes restarts in neutral allot of times i have to stop and put it in park turn key completely off position I...


This is a case of which came first.
The stalling is most likely caused by your Cam Sensor. The description for Diagnostic Test Code (DTC) P0340 is "cam sensor circuit malfunction" This is a VERY COMMON problem on 7.3L diesel engines. Ford has had a lot of trouble with these.

The description for DTC P0470 is "exhaust back-pressure sensor circuit malfunction" This code can be caused by the EBP sensor, the circuits to the EBP sensor or a faulty Powertrain Control Module (PCM)

The description of DTC P1211 is "Injection Control Pressure (ICP) above or below desired" This can be caused by the engine stalling. It can also be caused by several other things, including low engine oil level or a possible faulty PCM. (Check you engine oil level FIRST.)

The troubleshooting charts needed to properly diagnose DTCs P0470 and P1211 depend on whether these codes are Key-On-Engine-Off (KOEO), Key-On-Engine-Running (KOER), or "continuous memory" codes. If you retrieved these codes with a generic OBD scan tool, then they are definately present in "continuous memory". However, a scan tool with the capabilities to read KOEO and KOER codes MUST be used to determine if these are "HARD" or "INTERMIITTENT" faults. The troubleshooting steps vary greatly depending on this information.

Personally, I would start with the lowest number code first (P0340). Replace the cam sensor. Please note: this is the MOST LIKELY cause of the problem, but not the only POSSIBLE cause. Then clear all the fault codes and drive the truck to see if this or the other codes return.

Jun 11, 2011 | 1999 Ford F250 Regular Cab

2 Answers

I have a diagnostic code 340 and 320 on a 1997 Jeep Cherokee. What might the problem be?


DTC P0340 - Camshaft Position Sensor Circuit Malfunction
Symptoms can include:
  • Hard starting or no start
  • Rough running / misfiring
  • Loss of engine power
Causes:A code P0340 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 P0340 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

DTC P0320 also have with this wrong.

Jul 13, 2010 | 1997 Jeep Grand Cherokee

1 Answer

A p0340 trouble code and i changed the cam position sensor and all 4 o2 sensor's on a 01 ford mustang gt with a 4.6


Code P0340 is a camshaft position sensor CIRCUIT fault. This means it can be a bad sensor, wiring fault (loose connector, short, open), or even a bad PCM. Since you've already changed the camshaft position sensor you've eliminated that possibility. It's time to do some electrical troubleshooting. That, of course, depends upon your skill set for this type of work and equipment (mostly a good dmm and schematics). If you're not equipped for this then you'll likely have to seek assistance from a local shop.

If this reply answers your question then please take a moment to rate this post. - Thanks.

Jun 30, 2009 | 2001 Ford Mustang

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