P0306 Cylinder 6 Misfire Detected

P0306 indicates a detected misfire on cylinder 6. The named cylinder narrows the search, but diagnosis still needs data under the conditions that set the code.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Ignition / Misfire
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not keep driving with an active cylinder 6 misfire; raw fuel in the exhaust can overheat and damage the catalyst.

Useful checks before replacing parts

Review misfire counters and freeze-frame data to see when cylinder 6 misfires.
Inspect plug, coil or wire, injector, compression, valve sealing, local intake sealing, and harness condition.
Confirm any repair by repeating the same load, RPM, and temperature range that originally triggered the code.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and fault area. They may share the same verification status as the source database.