2023 Ram P0300: What It Means & Is It Safe to Drive?
P0300 on the 2023 Ram: Random/Multiple Cylinder Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM has detected misfires across multiple cylinders. This can cause damage to the catalytic converter if driven for long.
Common causes on the 2023 Ram
- Worn spark plugs or ignition coils
- Clogged or bad fuel injectors
- Low compression
- Vacuum leak, bad MAF, or fuel delivery issue
Symptoms
- Check Engine Light (often flashing under load)
- Rough idle, shaking, loss of power
- Possible smell of unburned fuel
Typical fixes
- Replace spark plugs and coils as needed
- Clean or replace fuel injectors
- Fix vacuum/fuel issues
- Compression test if no obvious cause
Repair cost range
For a 2023 Ram, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Ram
Ram P0300 on the 5.7L and 6.4L Hemi is closely tied to MDS lifter solenoid failure—a stuck deactivated lifter causes a dead cylinder that the PCM may log as P0300 rather than a specific cylinder code. Listen for a subtle ticking at idle alongside P0300; this pattern confirms MDS solenoid failure. On 3.6L Pentastar, coil boot moisture intrusion is the main cause. On Ram Heavy Duty with 6.7L Cummins diesel, P0300 indicates a glow plug or fuel injector issue—the Cummins uses a different diagnosis path than gasoline engines.
Most commonly affected models