The OBD code P0304 for Chrysler indicates a misfire in cylinder 4. This affects the engine’s performance, causing symptoms like engine light on, lack of power, hard starting, and engine hesitation.
Common causes include a faulty spark plug, clogged fuel injector, or ignition coil issues.
While not an immediate danger, it can lead to further engine damage if left unresolved.
To fix it, inspect and potentially replace the spark plug, fuel injector, or ignition coil in cylinder 4, and check related wiring for any issues.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the Chrysler p0304 OBD Code
The vehicle may experience rough idling or a noticeable lack of power.
- With Chrysler OBD code P0304, the Engine Light will be ON.
- Lack/loss of power may be experienced.
- Hard start can occur.
- Engine hesitation might be noticeable.
Causes of the Chrysler p0304 OBD Code
Possible reasons for Chrysler fault code P0304 include ignition system faults and fuel delivery issues.
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- P0304 can be caused by Faulty Spark Plug #4.
- Clogged or faulty Fuel Injector #4.
- Faulty Ignition Coil #4.
- Fuel Injector #4 harness is open or shorted.
- Fuel Injector #4 circuit poor electrical connection.
- Ignition Coil #4 harness is open or shorted.
- Ignition Coil #4 circuit poor electrical connection.
- Insufficient cylinder 4 compression.
- Incorrect fuel pressure.
- Intake air leak.
Fixing Chrysler Error Code p0304 Step By Step
Address misfire in cylinder 4 on a Chrysler by checking spark plugs, ignition coil, and fuel injector.
- To fix a Chrysler OBDII code P0304, start by reviewing the possible causes related to cylinder 4 misfire.
- Visually inspect the ignition system components such as spark plugs, ignition coils, and spark plug wires for any signs of wear or damage.
- Check the fuel injector for proper operation and ensure it is delivering fuel to the cylinder correctly.
- Test the compression in cylinder 4 to verify the engine’s mechanical condition.
- If all components check out, consider swapping the ignition coil with another cylinder to see if the misfire follows.
- Finally, reset the fault codes and test drive the vehicle to see if the issue has been resolved.
Cost Of Fixing Chrysler p0304 Fault Code
The repair for Chrysler fault code P0304 may involve replacing the spark plug, ignition coil, or fuel injector.
The cost to diagnose and fix a Chrysler OBD code P0304 is typically based on an estimated repair time of 1. 0 hour.
Labor rates range from $75 to $150 per hour, so the cost can vary between $75 and $150, depending on shop rates and the complexity of the repair.
Details of the Chrysler p0304 OBD Code
Chrysler code P0304 indicates a misfire in cylinder 4.
Code P0304 means a misfire was detected in cylinder 4. It’s triggered by the Engine Control Module (ECM) based on crankshaft speed fluctuations.
This code indicates that cylinder 4 is not contributing properly to the engine’s combustion cycle, leading to a rough running engine and potential power loss.
Misfires can be caused by issues such as faulty spark plugs, ignition coils, fuel injectors, or compression problems in the cylinder.
The ECM monitors the crankshaft speed to detect variations caused by misfires in specific cylinders, triggering a fault code like P0304 when it detects a misfire in cylinder 4.
Mechanic’s Tech Notes
Detailed information on diagnosing and repairing Chrysler code P0304 related to cylinder 4 misfire.
To diagnose and fix OBDII code P0304 on a Chrysler vehicle, focus on cylinder 4 misfire.
Use a scan tool to monitor live misfire data and pinpoint the issue.
Check spark plug condition, ignition coil operation, and fuel injector performance for cylinder 4. Use a voltmeter to test the coil’s primary and secondary circuits for proper voltage and resistance.
Inspect the wiring harness and connectors for any damage or corrosion that could affect the ignition system.
Clear the code after repairs and perform a road test to confirm the issue is resolved.
FAQ
Common causes of OBD code P0304 in a Chrysler vehicle include faulty Spark Plug #4, clogged Fuel Injector #4, faulty Ignition Coil #4, and poor electrical connections.
Diagnose and fix OBD code P0304 in your Chrysler by checking spark plug #4, fuel injector #4, ignition coil #4, and related wiring for faults or damage.
It is not safe to continue driving with OBD code P0304 in a Chrysler vehicle. Address the causes listed to prevent potential engine damage.
Wrap Up
If your Chrysler is running rough with OBDII code P0304, it may be caused by a misfiring cylinder, faulty spark plug, ignition coil issue, or a vacuum leak near cylinder 4. Check spark plugs, ignition coils, and fuel injectors for cylinder 4 for any signs of wear or damage.
To resolve Chrysler OBDII code P0304, inspect spark plugs, ignition coils, and fuel injectors for cylinder 4. Test the ignition coil and replace if necessary.
Check for vacuum leaks near cylinder 4 and repair as needed.
