Question about 1996 Ford Taurus

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IF MY GROUND WIRE WAS NOT DISCONNECTED WHILE MY CAM SHAFT SENSOR WAS INSTALLED WOULD I STILL FAIL MY EMISSION? I FAILED EMISSION BECAUSE OF MY CAM SHAFT POSITION SENSOR, SO I BOUGHT A NEW ONE HAD IT INSTALLED BUT FAILED AGAIN. THEN MY FRIEND REMEMBERED HE DID NOT DISCONNECT GROUND WIRE.... SO HE DID IT TO "RESET" THE COMPUTER... WILL I PASS NOW?

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  • Ford Master
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It should pass if the problem was erased from the computer. You should have received a "check engine " light warning about a problem. The light should be off now that the computer is cleared.

I would say that you should ask what Code number was indicated for your problem. I find it interesting that this particular sensor would allow the engine to continue to run if the sensor was bad. Also it may be a good idea to drive 40-50 Miles on the E-way to allow the Catalytics to heat up and stabilize after running so long with a bad part.

If you still have problems with the test, there are a few additives that are suppose to help the car pass the test while the chemical is in the tank. I hope my solution is very helpful to you.

Posted on Mar 23, 2011

Testimonial: "YOU ARE AWESOME!!!!!"

  • DENEEN BOEDER Mar 23, 2011

    THANK YOU I AM GOING TO TRY THAT... YEA THE SENSOR LITERALLY CRUMBLED IN MY FRIENDS HAND WHEN HE WAS TAKING IT OFF!

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Code P0016 on toyota sienna 2006


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2005 Cadillac won't start. no ignition fire. codes po300,po014,po340,po341, po345, po346, po420, po430, po171, po174


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I have a 2003 kia sedona van 3.5 liter that jumped time. I reset the timing put a new belt on it and it ran good for 35-45 min. Then it cut off, and wouldn't start back up. It has an OBD2 code for cam...


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PO102 and PO340 on 1997 GMC Jimmy


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I replaced the distributor, coil ignition module cam position sensor and still no spark in a 99 dodge avenger what could be the problem


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I HAVE A 99 CHRYSLER LHS AND IT SHUT DOWN AT IDLE AND TOOK TIME TO START BUT IT DID AND RAN LIKE **** SO THE ENGINE LIGHT CAME ON P0340 CAME UP SO I CHANGED THE CAM SENSOR BUT CAR STILL RUN LIKE **** I...


Try clearing the code and also disconnect the battery for a couple min. I had a car that had this problem. It did the same thing when the cam sensor was changed. I disconnected the battery and made the ecu relearn.

Its worth a shot, my next thing would be to check the coils.

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1 Answer

I have C280 Mercedes Benz. The car starts, but the engine dies after about 20 minutes.


Symptoms look like thermal instability of either the cam shaft position sensor or the crankshaft position sensor. Sometimes these sensors can fail by outputting reduced voltage with temperature increase so they appear to works fine at start up but fail when the engine reaches running temperature. I think the the cam sensor is Hall effect and the cam sensor magnetic:

2 pin socket (magnetic - sine wave output). One pin is 'ground' the other is 'signal'. A voltmeter set to 2 volts AC (note) should measure a signal in the 0.2 to 2 volts range on the 'signal' pin.

3 pin socket (Hall effect, magneto - square wave form output). One pin is 'reference' (5volts), one pin is 'ground' and the third pin is 'signal'. A DC (note) voltage should be detectable in the 0.5 to 1.5 volt range from the 'signal' pin.
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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.

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1 Answer

I have a 98 Fordwindstar 3.8 . It failed emission on code P0340 . I replaced the cam shaft position sensor it still shows code P0340 what else could it be?


the input to the sensor must also be checked. this link provides some diagnostic procedures. diagnosis for camshaft and crankshaft sensors are similar, as stated in the article.

http://www.aa1car.com/library/crank_sensors.htm

Jun 10, 2010 | 1998 Ford Windstar

1 Answer

Error code po340 for a 2002 hyundai elantra


Here is what I could find on your P0340 error code:
CausesA 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 SolutionsWith 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
Sounds like since you have replaced both the camshaft and crank shaft sensors you need to look at the PCM.  Go down the line of possible solutions and don't replace the PCM unless nothing else works obviously.  I hope this helps but it looks like you are looking at getting a new PCM.  Good luck.  Thanks for rating my response and for using FixYa!

May 27, 2009 | Hyundai Motor 2002 Elantra

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