The Lemon IndexCylinder 6 is not firing properly, so the engine runs rough and loses some power.
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.
Spark plug or ignition coil on cylinder 6. Then: fuel injector on cylinder 6; vacuum leak near that cylinder.
Owners named P0306 in 91 complaints to the U.S. government, most often on the Jeep Wrangler.
Cars owners report it on
Complaints that name P0306, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2012 Ford F-Series · 2004 Toyota 4Runner · 2013 Jeep Wrangler · 2017 Chrysler Pacifica · 2016 Honda Pilot · 2019 Honda Pilot
The details
What P0306 means
Cylinder 6 is not firing properly, so the engine runs rough and loses some power. A flashing check engine light means the misfire is serious enough to damage the catalytic converter, so slow down and get it checked right away.
Can I drive with P0306?
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.
67% of the owner complaints that name P0306 also say the car shakes, runs rough or misfires. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0306
- Spark plug or ignition coil on cylinder 6
- Fuel injector on cylinder 6
- Vacuum leak near that cylinder
- Low compression (valve or piston ring problem)
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Shakes, runs rough or misfires: 67% of complaints
- Loses power or goes into limp mode: 23% of complaints
- Stalls or shuts off: 21% of complaints
- Transmission slips or shifts hard: 13% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0306 most
2012 Ford F-Series (3), 2004 Toyota 4Runner (3), 2013 Jeep Wrangler (3), 2017 Chrysler Pacifica (3), 2016 Honda Pilot (3), 2019 Honda Pilot (3).
Related codes
P0305 P0307 P0304 P0308 P0303 P0309 P0302 P0301
Quick answers
What does P0306 mean?
Cylinder 6 Misfire Detected. Cylinder 6 is not firing properly, so the engine runs rough and loses some power. A flashing check engine light means the misfire is serious enough to damage the catalytic converter, so slow down and get it checked right away.
Can I drive with P0306?
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.
What causes P0306?
Spark plug or ignition coil on cylinder 6; Fuel injector on cylinder 6; Vacuum leak near that cylinder; Low compression (valve or piston ring problem).
Counts: NHTSA owner complaints whose text names P0306. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.