Codes P2305 and P0300

PJGAUGHAN323

MEMBER
2003 CHRYSLER PT CRUISER
2.4L
4 CYL
2WD
AUTOMATIC
170,000 MILES

I have the car listed above, non-turbo that will lose engine power randomly. It will start right up, and it could run smoothly for a short trip or it could immediately lose engine power. I believe it is cylinders two and three that stop firing (p0300) and the p2305 code is "insufficient ionization on side b of the coil". If you turn the car off then back on, sometimes the problem goes away, but it eventually happens again. The spark plugs, cables, and ignition coil have all been replaced. My mechanic said the PCM may have a short.

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon.

The first thing I would do is a compression test and a fuel pump pressure test. Fuel pump is common issue for the 300 code.

As far as the PCM? Nope, that is an expensive guess on your dime that most likely is not the issue.

Roy

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

300

P0300
Descriptor
Multiple Cylinder Mis-Fire
Multiple Cylinder Misfire
Probable Causes
Automatic Shut Down (ASD) Relay Ouput Circuit (Coil)
Automatic Shut Down (ASD) Relay Output Circuit (Injector)
Camshaft Position (CMP) Sensor/Crankshaft Position (CKP) Sensor Signals Erratic
Coil Control Circuit
Engine Mechanical Problem
Fuel Injector
Fuel Injector Operation
Fuel Leaks Down
Fuel Pressure
Fuel Pump
Fuel Pump Strainer
Fuel Supply Line Restricted
Fuel System Problem
Ignition Coil
Ignition Wire
Injector Control Circuit
Intermittent Misfire
Other Possible Causes for Misfire
Powertrain Control Module (PCM)
Powertrain Control Module (PCM) Ignition System
Secondary Ignition or Mechanical Problem
Spark Plug

2305

P2305
Descriptor
Ignition Coil #2 Secondary Circuit-Insufficient-Ionization
Probable Causes
Ignition Coil
Ignition Coil Operation
Ignition Wire
Intermittent Condition
Spark Plug

SYMPTOM
P2305-IGNITION COIL # 2 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION

TEST NOTE
This symptom is diagnosed using the test P2302-IGNITION COIL # 1 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION.

WHEN MONITORED
Engine Running.

SET CONDITION
If PCM detects that the secondary ignition burn time is incorrect or not present an error is detected. One Trip Fault

POSSIBLE CAUSES
- Intermittent condition
- Spark plug
- Ignition wire
- Ignition coil operation
- Ignition coil