SOURCE: Oxygen Sensor Location 2001 Ford Expedition Eddie Bauer
There are four o2 sensors on this truck. one on each side just below the exhaust manifold, and one on each side behind the second catalytic converters. (just about even with the back of the front doors.
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:
SOURCE: locate camshaft sensor 2002 chevy trailblazer
Assuming you have a 4.2L engine here is the location.
Hope this helps out,
if so please rate my answers.
Brett
SOURCE: Camshaft Position Sensor Location
IF U GO TO THE RIGHT SIDE OF THE ENGINE AND LOOK 4 INCHES BEHIND THE BELT IT WILL BE ON TOP OF THE TIMING COVER.THE WIRES WILL BE RED/WHITE,BLACK,BROWN/WHITE
SOURCE: Where is the rear bank
Both cam sensors are on the rear of the cylinder heads. They are located in the same place on each head. The only difference in the two sensors is one has a straight connector and the other has an angled connector because of other things that are in the way, (see diagram)
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