Camshaft Position Sensor?

I'm getting code 54. Is this the camshaft position sensor? If so, is this a dealer only part and how much are they going for?

I've never had to buy one, though I've had to clean the connector out twice. I'd try that first.

I just bought one from internet for $30. use google.

Is the camshaft position sensor also known as an 'ignition pickup/stator'?

BTT. Situation: 91 Jeep Cherokee w/I-6 cranks but won't turn over.

Other info: replaced fouled plugs. Engine is getting fuel.
Have spark, and air cleaner is good/clean/dry. Replaced dist cap because it had green deposits on terminals inside cap(moisture?). Replaced rotor too.
Last week I pulled codes 12, 54, 55. Code 54 being the camshaft position sensor. I haven't put a new one in yet as I was checking grounds and for bare wires. Everything looked OK. Now after letting the battery charge back up, I get codes 12,55 and not 54. I disconnected the camshaft sensor with the ignition on and re-connected it before I got the current codes. Still nothing but cranking.

Question 1: If the Camshaft pos sensor was bad, would it
cause the engine not to turn over even if it's getting air,
fuel and spark?

Question 2: Is it easier for a novice just to replace the whole
distributor rather than taking it apart to put in a new sensor?

thanks for assistance

The camshaft position sensor is inside the distributor, and relatively easy to replace. Much simpler that replacing the entire distributor - take the distributor cap off, and the rotor, the sensor is underneath the rotor. iirc it just drops in place. they can be bought at most decent parts stores.