2023 Acura P0300: What It Means & Is It Safe to Drive?
P0300 on the 2023 Acura: 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 Acura
- 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 Acura, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Acura
Acura P0300 on J35/J37 V6 engines is most often caused by a melted ignition coil harness connector—the coil connectors on the rear bank (cylinders 4–6) are near the firewall and corrode or melt from heat cycling. Inspect all six connectors for cracked or melted plastic before replacing coils. On RDX 2.3T K23A1, P0300 under boost is usually a boost leak from the intercooler hose couplers. On MDX with SH-AWD, ensure the rear differential oil cooler isn't contributing excess heat to the transmission tunnel area near the coil connectors.
Most commonly affected models