What does a code 23 mean on a Pontiac 6000 1986 model?

Question edited for clarity.
Question moved to model category.

Did you clear the codes?
Have you disconnected the battery just before it wouldn't start?

P0353 OBD-II Trouble Code: Ignition Coil C Primary ...

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P0353 means a malfunction has been found specifically in ignition coil C. Problems may include broken connector locks and loose connection at coil.
Missing: G6 ‎' Must include: G6

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  P0355 OBD-II Trouble Code: Ignition Coil B Primary ...

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  Trouble code P0355 means the PCM has identified an electrical malfunction in the primary or secondary circuit of ignition coil B.

P0315 Code: Crankshaft Position System Variation Not Learned

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Sep 15, 2022 - Diagnostic trouble code (DTC) P0315 stands for "Crankshaft Position System Variation Not Learned." The crankshaft position sensor measures the ...

looks like the reader you used was a generic model but this may help. found this helpful answer from pontiac mechanic on JustAnswer com

What does your 'code 23 out' mean, is that the OBDI code or what? Is it in the recall GM list for problems??

Should be easy it's located on the top of the transmission by the shift lever.

I assume you mean 12 , 23 , & 55 right? If so the 12 means no ignition reference or battery has been disconnected.. (if vehicle not running during test this is OK) 23 mean there is a problem in the IAT circuit (Intake Air Temperature sensor). Could be faulty sensor or poor connection. 55 means end of code string.

Preaty problem you got there but how did u got those codes if it is a 99 you should get a generic obd II code that start with the letter P but try from the basic inspect your plugs and wires and if are those are okay you could have a bad cranck possition sensor but I will suggest you to get a OBD II scaner to see if you can get a generic code

code 23 is MAT too low.(mass air temp.) code 36 is Mass Air Flow Sensor Error

The ECM receives a signal from the Mass Air Flow sensor depending on the amount of air entering the engine. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.

Fault Code Description

• 36 - Mass Air Flow sensor error

Symptoms

• Engine stalling
• Lack of power

Common Problems Faulty Mass Air Flow sensor,Broken wire to Mass Air Flow sensor,Dirty sensing element in Mass Air Flow sensor

P0102 is a MAF SENSOR CODE (MASS AIR FLOW)
i could guess and say replace the MAF sensor
there is an 23 step diagnostic procedure for this code

OBD-II Trouble Code Technical Description
A P0020-023 code refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car's PCM (powertrain control module). That consists of an oil control valve (OCV), also called a solenoid valve and other components. Basically the check engine light and associated P0020-023 trouble code means that the voltage in the circuit has fallen below a set limit for a specific amount of time (varies by make/model/engine). Bank 2 is the side of the engine that doesn't contain cylinder #1.

Causes…
A code P0020-023 may mean that one or more of the following has happened:

• Faulty oil control valve (OCV)
• Open or short in the VVT/VCT circuit
• Open or short in the OCV / solenoid valve
• Damaged computer (PCM)

Possible Solutions
Some recommended troubleshooting and repair steps are:

• Carefully inspect the Bank 2 VVT/VCT system circuit wiring and connectors, repair as required
• With a warm engine, test the operation of the OCV, replace/repair as needed