The Lemon IndexThe engine computer sees misfires that move around between cylinders instead of staying in one. Full P0300 page
14 owner complaints · the #5 code Honda Accord owners name · 7% of Honda Accord complaints that name a code (every car: 2.9%)
Middle of 46,000 miles · most between 2,100 and 95,000 (6 owners gave it)
Honda Accord owners named P0300 in 14 complaints to the U.S. government (NHTSA), most often on the 2018, 2019 and 2014 model years, at a middle of 46,000 miles. The part they name most is the spark plugs (2 complaints). Complaints are owner reports, not proof of a defect.
Honda Accord model years that report P0300
Owner complaints naming P0300, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
46,000 miles is the middle of what 6 owners entered. Half were between 2,100 and 95,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the spark plugs, in 2 of the 14 complaints (14%). 1 of those mention it being replaced or repaired, and 1 say the problem came back afterwards.
- Spark plugs2 complaints1 mentions a repair or replacement, 1 of them says the problem came back · what Honda Accord owners paid
4 complaints mention a recall.
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Symptoms owners describe with P0300
50% of these complaints say the check engine light came on.
- Shakes, runs rough or misfires71%10 of 14 complaints
- Loses power or goes into limp mode50%7 of 14 complaints
- Flashing check engine light21%3 of 14 complaints
- Stalls or shuts off21%3 of 14 complaints
- Warning lights and electrical faults21%3 of 14 complaints
- Brakes or ABS act up14%2 of 14 complaints
Share of the complaints naming P0300 whose text also describes each problem. A complaint can describe more than one.
Codes owners report with it
P0304 8 P0301 7 P0302 5 P0303 5
Other codes named in the same Honda Accord complaints, and in how many.
Repair costs
Honda Accord spark plug replacement cost
Recalls on these Honda Accord years
- Engine · 2014 · issued 2015
The affected vehicles may have been assembled with improperly torqued connecting rod bolts, which can cause the engine to lose power or leak oil. NHTSA 15V121000
1 recall for the same systems (engine) on the Honda Accord model years above. A recall for the same system isn't proof it's behind P0300. Recall work is free at any dealer: check a VIN at nhtsa.gov/recalls or with our VIN check.
Keep going
- P0300: meaning, causes and every car that reports it
- Honda Accord reliability by year
- 2018 Honda Accord problems and recalls
Other codes Honda Accord owners report
P0303 P0304 P0301 P0302 P0087 P0741
P0300 on other cars
Ford Escape (36) · Chevrolet Silverado (19) · Ford Fusion (19) · Honda CR-V (14) · Kia Soul (14) · Ford Edge (13) · Chevrolet Tahoe (11) · Ford F-Series (10) · GMC Sierra (10)
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What P0300 means
The engine computer sees misfires that move around between cylinders instead of staying in one. The engine may shake, stumble or feel down on power. If the check engine light flashes, the misfire is bad enough to overheat the catalytic converter: slow down and get it checked right away.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
- Worn spark plugs or ignition coils
- Vacuum leak
- Low fuel pressure or dirty injectors
- Engine mechanical problem (compression, valve timing)
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11762909, 11762060, 11747924, 11730158, 11683494, 11614869, 11558336, 11517233, 11510869, 11395939, 11353959, 11324367 and 2 more.
Quick answers
What does P0300 mean on a Honda Accord?
Random/Multiple Cylinder Misfire Detected. The engine computer sees misfires that move around between cylinders instead of staying in one. The engine may shake, stumble or feel down on power. If the check engine light flashes, the misfire is bad enough to overheat the catalytic converter: slow down and get it checked right away.
Which Honda Accord years have the most P0300 complaints?
In complaints to NHTSA, owners of the 2018 (5), 2019 (3), 2014 (2) Honda Accord named P0300 most (14 complaints in all, 2011–2024). Raw counts, not a failure rate.
What fixes P0300 on a Honda Accord?
Owners most often name the spark plugs (2 of 14 complaints). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does P0300 show up on a Honda Accord?
Owners who gave their mileage reported a middle of 46,000 miles; half were between 2,100 and 95,000 (6 owners).
Can I drive my Honda Accord with P0300?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Sources: NHTSA owner complaints that name P0300 on the Honda Accord, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.