Question about 2001 Mercury Cougar

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I recently purchased a 2001 mercury cougar and it has an a DTC code P0340 faulty cam position sensor, out of time. I replaced the sensor and it did not fix the problem. The man I bought the car from had recently replaced the timing belt could it be that he tightened it down to much or not enough or maybe he was off by a tooth when he installed the new belt. The car runs great except when I give it alot of gas it wants to stall.

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Unplug the alternator and see if the problem stops, if so replace it, a short inside the alternator can cause this problem, however still test good, and keep the battery charged and cause the computer to throw this code. Its possible the belt is a tooth off, however you would experience more trouble than what you have.

Posted on Mar 28, 2011

  • Martin D. Stull Mar 28, 2011

    Thank you I will give that a try and let you know how I make out.

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1 Answer

Generated DTC P0340. Replaced both position sensors but still have DTC P0340. Why?


Did u clear the code with obd2 scanner if not try unhooking battery for 15 min and then hook battery back up if code still comes up may have bad wire some where or faulty sensor

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Code error p0340


Hi there:
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CHeck details HERE.

Apr 25, 2013 | 2000 Cadillac DeVille

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1997 toyota camry how do you fix a p0340 camshaft sensor A_ bank 1 circuit malfunction


Well, a lot depends on what is causing the P0340 Diagnostic Test Code (DTC) to set.

The Camshaft Position Sensor (CMP) is a pick-up coil mounted in the outer corner of the left cylinder head just below the valve cover (assuming your Camry is equipped with a V-6...you didn't say)
a one tooth signal plate is mounted to the outer camshaft. DTC P0340 sets when there is no signal recieved from the sensor by the Engine Control Module (ECM) either during engine cranking or engine running.
Possible causes are:
> Open or short circuit in CMP sensor circuit
> Faulty CMP sensor
> Defective starter
> Damaged cam signal plate
> Broken timing belt
> Internal ECM problem
Proper diagnosis required.

Jun 09, 2012 | 1997 Toyota Camry

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I got diagnostic trouble codes P0108,P0121,P0340 what does it means and give me the remedial action for that


Here is what each of your trouble codes means:

DTC P0108 MAP Sensor Range check High
DTC P0121 TPS Circuit Range/Performance Problem
DTC P0340 Camshaft Position Sensor Circuit Malfunction
Do you know how long each of these codes have been stored? Each one of these codes relate to a different part of the vehicle.

Your PO108 codes is probably a faulty Manifold Absolute Pressure Sensor
PO121 is a Throttle Position Sensor malfunction code
PO340 is a Camshaft Position Sensor malfunction code

I would not think that all 3 of these codes all set at the same time, just wouldnt make sense unless there was a problem with the Engine Control Module (ECM) causing all these codes to set at the same time.

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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.

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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

2 Answers

I get a p1383 dtc for a 1999 mercury cougar


P1383 Cam Timing Advance is excessive Check your cam positioning sensor and see if that could be your culprit

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1 Answer

03 Taurus with DTC P0340, P1336


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












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