I keep getting the check engine light on in my 2004 Hyundai Sonata with 2.7 v6. Computer says P0340 camshaft position sensor circuit malfunction. I actually replaced the cam position sensor but I still get the error codes. It actually has acted so bad that it says cylinders 1, 3, and 5 are misfiring. In the Haynes manual it says on V6 engines there are 2 cam position sensors, I can only find the one I replaced. I also gave it a tune up with new plugs and wires, all gaps were correct as well. So I am stumped. Any help on the location of the 2nd cam position sensor would be greatly appreciated.

Marvin

• 85242 Answers
• Posted on Aug 28, 2008

SOURCE: location of the camshaft position

It is located at the right top of engine (V6). Looking from the front of the car, it is just past the plastic cover over the engine. It has a silver clip (looks like a paper clip). remove clip and unplug sensor.

SOURCE: 2001 sonata V6 spark plug

For starters if your going to do 1 do all. The locations are from left to right when standing in front of the car. 1, 3, 5
2, 4, 6

wires are 3
6
2
4
5
1

Anand Kumar

• 2035 Answers
• Posted on Dec 26, 2008

SOURCE: Location of camshaft position sensor on a 2001 Hyundai Elantra wL

The camshaft position sensor is located on the engine near the timing belt cover and under the upper radiator hose.

SOURCE: my hyundai santefe won't start.

First of all, when you start, will it turn over at all or not? You say you have no power to the injectors. How did you verify this? If so, it's possible your fuel system fuse is burnt out. The fuel pump relay powers only the fuel pump. A separate relay and fuse take care of the injection system itself. Check those also. Until you know more about what the cam is doing, though, you might want to check it thoroughly. Also, just getting compression in one cylinder is not a verification of whether the cam is turning. There are bound to be more than one cylinder that will still build compression even if the cam is stopped. You might need to check more than one cylinder, or go as far as to do a compression test.

dave smith

• 94 Answers
• Posted on Feb 27, 2009

SOURCE: P0340 Code Camshaft Position Sensor

The Camshaft Position (CMP) Sensor detects the position of the camshaft in order to identifiy when piston No. 1 is on its compression stroke. The CMP sensor is used for ignition timing in the Ford DIS igntion system, but not in the EDIS igntion system. Both DIS/EDIS use the CMP signal for synchronizing the firing of sequential fuel injectors.

On the 3.0L vulcan engine, the CMP signal is generated by a single Hall-Effect magnetic switch, activated by a single "vane" spinning around by virture of a synchronized shaft which is driven by the camshaft. 

The CMP sensor & synchronizer/shaft are located behind the intake manifold (i.e., back near the firewall on a Ranger) on the top of the cylinder block. If you just need to replace the sensor, it is a simple job of unplugging the electrical connector and removing the screws holding the sensor in place. Here is a sketch of the sensor to give you an idea what to look for: