2022 Honda P0300: What It Means & Is It Safe to Drive?
P0300 on the 2022 Honda: 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 2022 Honda
- 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 2022 Honda, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Honda
Honda P0300 on K24 and R18 engines is frequently caused by a melted or corroded ignition coil harness connector—the coil connector on cylinder 1–4 can melt from exhaust heat proximity. Inspect all four connectors before buying parts. On Accord V6 3.5L J35, the rear three coils (cylinders 4–6) are difficult to access and are often skipped during tune-ups, leading to ignition failure. Honda spark plugs should be replaced at 30k–60k intervals; extended plug intervals cause electrode erosion and P0300.
Most commonly affected models