I keep getting a p0206 and a p0306 code on my jeep and i have already replaced the cylinder 6 fuel injector and was wondering what to do to fix it. Hoping i dont have to replace pmc

where did you get codes? whomever told you have told the meaning.
use google and search Jeep codes.

P1282 JEEP - Fuel Pump Relay Control Circuit Condition
P0171 JEEP - Fuel System 1/1 Lean
P0174 JEEP - Fuel System 2/1 Lean
P0306 JEEP - Cylinder 6 Misfire Fault Detected


OBDII Codes Engine Light Repair and Diagnostic Information AutoCodes com

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...

Common for injector sub harness to fail. If you have an injector code p0201-p0206 this may be the cause.

Do you know how to do a continuity test of the injector ? How to Check Fuel Injector Resistance with Multimeter This problem could be the injector is open internally or the electrical circuit or the driver that controls the circuit inside the ECM/PCM is bad , which means that a new computer would be needed . P0206 Cylinder 6 Injector Circuit Malfunction An I would get rid of those E3 spark plugs , Chrysler , Jeep an dodge vehicles don't like those, Cause running problems , check engine lights to come on etc...

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
??

• 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

P0305 - Cylinder 5 Misfire Detected
P0306 - Cylinder 6 Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, The Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

When is the code detected?
- Engine Cylinder #5 and #6 is Misfiring.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Possible Causes:
- Improper spark plug at cylinder #5 and #6
- Insufficient compression at cylinder #5 and #6
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #5 and #6
- Fuel injector #5 and #6 may be faulty
- Intake air leak at cyli

Possible Solution:
- Perform Injector Service
- Replaced Spark Plug #5 and #6
- Replaced Injector #5 and #6
- Replaced Ignition Coil #5 and #6

Hope helps.

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

I'd change shops. it's clear the miss is on #6 cylinder. you will need to see if your getting spark on that cylinder and check for fuel getting to that cylinder also check for vaccum leak around #6 injector.