2011 Infiniti P0300: What It Means & Is It Safe to Drive?
P0300 on the 2011 Infiniti: 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.
PowertrainHigh urgency
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 2011 Infiniti
- 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 2011 Infiniti, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Infiniti
Infiniti VQ35/VQ37 P0300 is commonly associated with timing chain stretch on higher-mileage models. Rattling at cold startup combined with P0300 is a strong indicator; ignition coils and spark plugs should still be ruled out first.
Most commonly affected models
G35 2003–2007G37 2008–2013FX35 2003–2008