P0303 on HONDA ACCORD
What P0303 Means on Your HONDA ACCORD
Real HONDA ACCORD Owner Reports (Source: NHTSA Complaints Database)
"For the 2nd time since 2008, i've had to replace the sparkplugs due to pcm issues. the engine light will come on and gives an error code of p0303. unfortunately you can only go to honda to have the computer updated, and they will try to sell additional services."
"While driving at about 55 mph on route i-287 in morristown, nj, the car began to shake badly and the engine made a loud rumbling noise. i got the car to my local service station in morristown, where my mechanic told me that one of my spark plugs had failed to function, having been badly oil fouled."
"Burning oil excessively since i have had the car. i never got a recall notice. having to add a qt or better a week. june 12 it stalled out all the way home from work. that was a sunday. just checked the oil on thursday. oil was okay in thursday. on sunday no oil to show on dipstick."
"On 4/5/19, my wife's honda pilot ex experienced severe engine problems on the road in fairview tn resulting in an inability to accelerate, hesitation when the gas pedal was depressed, and a flashing 'check engine' light."
"While driving, my 2018 Honda Accord suddenly lost power and went into limp mode with no prior overheating or warning signs. The acceleration dropped instantly, and the vehicle nearly caused an accident as it seized up in traffic."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0303 on HONDA ACCORD
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.