How do I remove the cam shaft position sensor on a 98 Pontiac transport

P0016 OBD II Trouble Code Camshaft Position Camshaft Position Correlation...

run fault codes and check for cam/crank position sensor check that the cam shaft is turning (broken timing belt/chain) Check immobliser operation.

Buy the sensor from the car dealership. The sensors at auto stores are inferior and sometimes do not work properly.

There are 12 common sensors and 10 internal sensors. The most common that often fail (MAP), (TPS), (CAM), (IGN), (CRANK) MAP is your mass air flow which is located at the beginning of your air intake, TPS is the throttle body position sensor, the CAM is the cam shaft position sensor (transmission), IGN ignition position sensor and the CRANK sensor is located near the bottom driver side front

Chain

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REMOVAL & INSTALLATION

4.3L, 5.0L, 5.7L and 7.4L Engines
See Figures 1, 2, 3, 4, 5 and 6

1. Remove the timing cover. This will allow access to the timing chain.
2. Crank the engine until the timing marks on both sprockets are nearest each other and in line between the shaft centers.

Fig. Fig. 1: Crank the engine until the timing marks on both sprockets are in line

1. On 1996-98 vehicles remove the crankshaft position sensor reluctor ring, if equipped. On 7.4L engines tool J-41371 or its equivalent puller must be used to remove the reluctor ring.
2. Take out the bolts that hold the camshaft gear to the camshaft. This gear is a light press fit on the camshaft and will come off easily. It is located by a dowel. The chain comes off with the camshaft gear.

Fig. Fig. 2: Remove the camshaft gear retaining bolts

Fig. Fig. 3: Remove the camshaft gear and timing chain
A gear puller will be required to remove the crankshaft gear.
To install:

1. Without disturbing the position of the engine, mount the new crankshaft gear on the shaft, and mount the chain over the camshaft gear. Arrange the camshaft gear in such a way that the timing marks will line up between the shaft centers and the camshaft locating dowel will enter the dowel hole in the cam sprocket.
2. Place the cam sprocket, with its chain mounted over it, in position on the front of the truck and pull up with the three bolts that hold it to the camshaft.
3. After the gears are in place, turn the engine two full revolutions to make certain that the timing marks are in correct alignment between the shaft centers. Tighten the camshaft sprocket bolts (and nut on the 4.3L) to 21 ft. lbs. (28 Nm) on 1988-95 models. On 1996-98 models, tighten the bolts to 18 ft. Lbs. (25 Nm). On the 7.4L, tighten them to 20 ft. lbs. (26 Nm) on 1988-95 models. On 1996-98 models, tighten the bolts to 25 ft. Lbs. (34 Nm).

When installing the crankshaft position sensor you must use install a new oil ring seal onto the sensor.

1. Install the crankshaft position sensor reluctor ring (if equipped), onto the crankshaft until it is firmly seated against the crankshaft sprocket. On 1996-98 7.4L vehicles replace the reluctor ring with a new component.
2. Install the front cover, torsional damper, water pump and the radiator.

Fig. Fig. 4: A gear puller will be required to remove the crankshaft gear

Fig. Fig. 5: Timing mark alignment-4.3L, 5.0L, 5.7L and 7.4L engines

Lower Control Arm

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The lower control arm is a two-piece welded unit with a riveted ball joint. A conventional rubber bushing is used for the rear lower control arm pivot. The front lower control arm bushing is mounted vertically.

REMOVAL AND INSTALLATION

Some special tools are required to perform this operation including, a front hub spindle removal tool and a suitable ball joint separator tool.

WARNING Do not hammer or pry ball joint from knuckle. Failure to use recommended tools may cause damage to the ball joint and seal.
See Figure 1

Fig. Fig. 1: Exploded view of the control arm-to-frame mounting

1. Raise the vehicle and suitably support by the frame allowing the control arms to hang free.
2. Remove the wheel and tire assembly.
3. Remove the steering gear outer tie rod from the steering knuckle.
4. Remove the stabilizer shaft link from the control arm.
5. Remove the front drive axle shaft nut and washer.
6. Use a suitable front hub spindle removal tool to Push the axle splines back out of the front wheel drive shaft bearing.
7. Remove the drive axle from the transaxle.

Drive axle joint seal protectors should be used anytime service is performed on or near the drive axles. Failure to observe this could result in joint or seal failure.

1. Place a modified inner drive joint seal protector on the drive axle joints.
2. If equipped, remove the ABS wheel speed sensor jumper harness.
3. Remove and discard the cotter pin, then loosen the nut from the ball stud.
4. Remove the pinch bolt and the control arm mounting bolts, then remove the control arm from the vehicle.

Hello,Thanks for using fixya.
this vehicle uses an intake and exhaust cam sensor they are both on the back of the head on each side I hope this answers your question

I don't know about the cam sensor, but the crankshaft position sensor is located just behind the crankshaft pulley, or possibly even right on the pulley. Should be just a small little thing with a couple small bolts holding it down. If you are changing it out, just be very careful to get it reinstalled in exactly the right position, they can be very finnicky.

Well you hit all the major ones, could be crank position sensor, ignition module, a bad coil pack (it should have 3), you need to check that you have spark to each plug while the engine is turning over (!!!be careful as this will hurt if you get shocked!!!), this will rule out coil packs. if you have no spark to any plug your looking at a bad ingnition module (which is what the coil packs bolt to). Hope this gets you on the right track!

its possible the cam sensor or the crank shaft position sensor maybe broken or coming apart. the cam sensor is part of the timing chain.