2020 Dodge P0300: What It Means & Is It Safe to Drive?
P0300 on the 2020 Dodge: 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 2020 Dodge
- 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 2020 Dodge, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Dodge
Dodge P0300 on 5.7L and 6.4L Hemi engines with MDS is a known issue—the MDS (Multi-Displacement System) lifter solenoids fail and leave cylinders in deactivated mode, causing P0300. This is diagnosable by checking which cylinders show misfire data with a scan tool. On Dart 1.4T MultiAir, the MultiAir electrohydraulic actuator (oil control valve) can cause P0300 when the OCV for a specific cylinder fails—a MultiAir-specific code often accompanies P0300. On Durango 3.6L Pentastar, coil-on-plug boot seal failure (same as Jeep) is the common cause.
Most commonly affected models