Your fuel injection computer (DME) may output a code that indicates a faulty camshaft position sensor (CPS). This important sensor tells the car's computer where the cams are located in relation to the combustion cycle. The DME takes the signals from both the cam position sensor and crankshaft position sensor, and calculates when to fire the fuel injectors and spark plugs. If the camshaft position sensor is not operating properly, your car will run very erratically or perhaps not at all.

Replacement of the camshaft sensor is easy especially when compared to replacing the crankshaft sensor. The camshaft sensor is located on the front right side of the motor right below the right side valve cover.

Begin by disconnecting the ground on the battery. I always disconnect the battery when working on any of the cars electronic systems.

You will need to remove the air intake duct on the right side of the engine. It compresses in towards the engine and slips off the front air inlet.

With the duct off remove the front engine cover. It pulls up and away from the engine. The cover is held on by five clips and will easily come off with hand pressure.

Locate the camshaft position sensor on the front right side of the engine just below the right side valve cover. You will need to use an extremely delicate touch when working with the connector as they tend to get really dried out and brittle.

Carefully release the connector from the sensor and using a small flat head screw driver and then use an E8 Torx to remove the bolt holding the sensor to the head. Note: Mercedes-Benz, along with several other manufactures are using micro encapsulated bolts in some of their cars, especially in areas where there will be a lot of heat and vibration and you can not have a high torque on the bolt due to the aluminum the bolt goes into. If you want to reuse the bolt it is a good idea to clean it up and use a little blue Loctite on the threads. DO NOT use red Loctite or you will have a very difficult time getting it out again.

Remove the sensor from the head taking care that the rubber o-ring comes with it. If the o-ring stays in the engine use a small pick or screw driver to remove it.

Installation is the reverse of removal.

Read the Full Article: https://www.pelicanparts.com/techarticles/Mercedes-W203/ENGINE-Camshaft_Positioning_Sensor/ENGINE-Camshaft_Positioning_Sensor.htm

Time: 1 hour
Tab: $50
Tools: E8 Torx driver, small flat head screw driver
Parts Required: New camshaft position sensor
Hot Tip: Disconnect battery, ALWAYS
Performance Gain: Better control of fuel injection and engine timing
Complementary Modification: Replace crankshaft position sensor

Applicable Models:
Mercedes-Benz ML320 (1998-03)
Mercedes-Benz W203 (2001-07)

Hochgeladen am 31.12.2020   Problem melden   Dieses Video bei YouTube   Pelican Parts bei Youtube