Question about Hyundai Motor 2004 Sonata

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What makes a camshaft position sensor go bad, are there any warning signs that it is going bad, How hard is it to replace?

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Usually something in the wiring inside the sensor goes bad. Not usually any signs, they just seem to go out randomly. Not sure how hard they are on the hyundai's, but it should be somewhere on the valve cover.

Posted on Mar 06, 2009

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2 Answers

Whst is code PO340


bad news
those is the main /cam sensor
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Jan 16, 2016 | 1999 Jeep Grand Cherokee

2 Answers

What are the probable causes of camshaft sensor DTC?


Camshaft sensors do go bad. They can go bad slowly, so you don't notice the badness until your engine stalls, but restarts, or you get a "check engine" light. They are not expensive or hard to replace.

Nov 10, 2015 | 1999 Isuzu Rodeo

1 Answer

Do you have to remove the cam gear to change the camshaft senaor.


Courtesy of a Beetle forum.

The camshaft position sensor is located at the front of the cylinder head under the timing belt cover. On 2.0L models, the camshaft position sensor is located behind the camshaft sprocket and is equipped with a pigtail lead and a remote connector. On 1.8L turbo models, the camshaft position sensor is located at the front of the intake camshaft. check the terminals in the connector and the wires leading to the sensor for looseness and breaks. Repair as required.

Before checking the camshaft position sensor, check the voltage supply and ground circuits from the ECM. Dosconnect the electrical connector from the camshaft position sensor and connect a voltmeter to terminals 1 and 3 at the harness connector from the camshaft position sensor and connect a voltmeter to terminals 1 and 3 at the harness connector. Turn the ignition key On - the voltage should read approximately 5.0 volts. If the voltage is incorrect, check the wiring from the camshaft position sensor to the ECM. If the circuits are good, have the ECM checked at a dealer service department or other properly equipped repair facility.

To check the camshaft position sensor operation, reconnect hte connector to the camshaft position sensor and using a suitable probe, backprobe terminal no. 2 of the camshaft position sensor connector. Connect the positive lead of a voltmeter to the probe and the negative lead to a good engine ground point. Turn the ignition key On. Rotate the engine slowly with a breaker bar and socket attached to the crankshaft pulley center bolt while watching the meter. The voltage should fluctuate between zero volts and 10.0 volts as the vanes in the reluctor wheel past the sensor. If the test results are incorrect, replace the camshaft position sensor. Note: Rotate the engine slowly through at least two complete revolutions. Removing the spark plugs from the engine will make the crankshaft much easier to turn. Warning: If you remove the spark plugs, unplug the primary (low voltage) electrical connector(s) from the ignition coil(s) to disable the ignition system

Jul 11, 2012 | Cars & Trucks

1 Answer

P 0340 VECTRA 120CP


P0340 - Camshaft Position Sensor 'A' Circuit Malfunctionxicon.jpghttp://engine-codes.com/p0340.htmlForum CodePossible causes- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Camshaft Position Sensor
- 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 is not detected by the Engine Control Module(ECM) during the first few seconds of engine crankingSymptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine StallP0340 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.

Jul 06, 2012 | Cars & Trucks

2 Answers

I keep getting a code P0340.Chrysler has reprogrammed the PCM for a long start issue.I cant seem to get anywhere with it.


P0340 - Camshaft Position Sensor Circuit Malfunction
This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it.

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


Hope helps.

Apr 24, 2011 | 2003 Dodge Neon

1 Answer

My car is showing PO344 (Camshaft Position Sensor A Circuit Intermittent) as a problem it's having... I replaced the camshaft sensor about 2 years ago when I was having a similar problem; could the sensor...


All ways, the camshaft position sensor signal sent to the ECM is intermittent

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 Powertrain Control Module (PCM) or Electronic 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.

Check thos DTC diagnostic and possible solutions about P0344 - Camshaft Position Sensor Circuit Intermittent

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall

Possible causes
- Harness or connectors (The sensor circuit is open or shorted)
- Camshaft position sensor may be faulty
- Camshaft (Intake) may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead (Weak) battery

Possible solution
- Charge battery
- Repair harness or connector
- Replaced Camshaft Position Sensor.
Tech notes
- Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.


Hope this helps.

Mar 27, 2011 | Dodge Stratus Cars & Trucks

3 Answers

What does code p1391 mean when failing an emissions test


intermittent loss of crankshaft or camshaft position sensor.

Oct 14, 2009 | 1997 Dodge Ram 1500 Club Cab

2 Answers

Crankshaft Position Sensor Error P0335 recurred after r&r


In the kit there are two sensor that look identical. The one for the crankshaft has a white paint mark on it near the bolt hole. Make sure that it is in the right location.

Jul 25, 2009 | 2003 Nissan Altima

2 Answers

Replacing a camshaft position sensor on a 1998 cutlass


The cam sensor is integrated with the crank shaft sensor behind the crank shaft pulley. The 3.1 runs 2 crank sensors. the one behind the crankshaft pulley in integrated to act as a cam sensor. It has 2 sets on rings for that sensor, 1 is in use accustomed for the fuel timing
Good luck and hope this helps friend. 

Jul 14, 2009 | 1998 Oldsmobile Cutlass

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