My 2000 saturn ls2 has a P0206 code. Cylinder 6

p0016
P0016 OBD II Trouble Code Camshaft Position Camshaft Position Correlation...
p0128
P0128 OBD II Trouble Code Coolant Thermostat Coolant Temperature Below...
p0206
P0206 OBD II Trouble Code Injector Circuit Malfunction Cylinder 6...
p0306

P0306 OBD II Trouble Code Cylinder 6 Misfire Detected

p0436

P0463 OBD II Trouble Code Fuel Level Sensor Circuit High Input...

With a noid light .
9pc Electronic Fuel Injection Signal Noid Lite Tester Light set GM Ford... or you could use just a test light . Video's on youtube showing how.

I have a 2004 cadillac cts. I'm getting ready to give it a tune up. Do the valve covers get filled with oil and there fore need to be replaced as well
??

In my experience the most common reasons for a misfire diagnostic trouble code (DTC) for a specific cylinder like P0306 which I am guessing is the DTC you recieved without have any other DTC's like a P0300 (random multiple misfire) is either the coil or the injector. There is always the chance you have a faulty connector at either the injector or the coil. It kind of hard to help you completely as I need to ask you a few questions in order to go further. Here are the first set of questions. After you clear the code, does it pretty much come right back ? I know the spark plugs are new but have you looked at the spark plug in cylinder number 6 ? Is it wet or black due to fuel ? I understand you are able to pull DTC's but are you able to look at any freeze frame data with the scanner you are using ? You can reply/comment here or email me directly at [email protected] and maybe we can work through this without having to replace a bunch of parts that don't need replacing. One thing you may want to try which can be a little bit of a pain with the injector but if it is a hard code or a code that comes back quickly after clearing the DTC but you may want to swap the injector (since you already replaced the coil) with an injector from another cylinder. If you recieve a new DTC for a misfire in the cylinder you put the injector that was originally in the number 6 position then more than liklely it's the injector that's faulty. Injectors can get dirty and kind of stick open and drip fuel when it should be off/closed. This will also cause a wet or black spark plug in that cylinder. Yes vacuum leaks and fuel pressure can cause this by the way but in most cases you will also get a P0300 as well.

P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High Input (24).P0203 Injector Circuit Malfunction-Cylinder no. 3 (27).0205 Injector Circuit Malfunction-Cylinder no. 5 (27).

P0206 Injector Circuit Malfunction-Cylinder no. 6 (27).

• if u have a circuit open code u have either a bad injector
  an ecm or a wiring problem testing the problem only
• involves the 2 circuit wires to the injector from the ecm

po206 is the is the inj. 6 not responding to control signal.
po306 is a misfire in the no.6 cylinder..
Check your ignition leads or the coils.
Ummm the spark plug.
It's a bit hard over the net but I hope this helps you

Plugs get changed at 70,000 miles
I would suggest that you use the OEM
Plugs,they are made by NGK and are special
on my 2004 LS,I don't know about yours.

Clean the MAF Sensor with the CRC Product
for that

Change the 2 front O2 Sensors at 100,000 miles

Check fuel pressure at the fuel rail on engine

The coil you replaced on #6 ,even though you
have a PO306 Code,doesn't mean that was the
bad one. It is a COP Coil or Ford thing, you will
learn as you get involved with them

In some cases, you buy 1 new coil and walk it
from one cylinder to the next.

On single coil codes, you may get lucky,on multiple
codes or a really bad coil you won't

Your not using any fancy test equipment and
unfortunately a lot of repair shops have it and
don't know how to use it,including dealers

V6 or V8 ?

P0300 Multiple Cylinder Misfire Detected

P0306 Cylinder 6 Misfire Detected

P0451 EVAP Pressure Sensor Range/Performance

I have no idea what those last two are. Typo, maybe?

Your first two codes could be caused by old spark plugs and/or leaking plug wires.

Your EVAP code could be a bad fuel tank pressure sensor or a malfunctioning EVAP system. With that code, if you remove your fuel cap and get a whoosing sound, then it is an issue with your EVAP system not properly venting the tank. If you don't get that sound, then the tank pressure sensor is bad.

CODE 27 - Injector Control Circuit, output driver does not respond properly to the control signal

Code 27 MIL light options: OBDII
P0201 - Injector #1 Control Circuit
P0202 - Injector #2 Control Circuit
P0203 - Injector #3 Control Circuit
P0204 - Injector #4 Control Circuit
P0205 - Injector #5 Control Circuit
P0206 - Injector #6 Control Circuit

CODE 43 - Cylinder Misfire, or Ignition Primary Circuit

CODE $# MIL options: OBDII
P0300 - Multiple Cylinder Misfire
P0301 - Cylinder #1 Misfire
P0302 - Cylinder #2 Misfire
P0303 - Cylinder #3 Misfire
P0304 - Cylinder #4 Misfire
P0305 - Cylinder #5 Misfire
P0306 - Cylinder #6 Misfire
P0351 - Ignition Coil #1 Primary Circuit
P0352 - Ignition Coil #2 Primary Circuit
P0353 - Ignition Coil #3 Primary Circuit