What does this code mean?
P0300 indicates random or multiple-cylinder misfire. P0301–P0308 identify the numbered cylinder. Ignition, fuel delivery, compression, air leaks or mechanical timing can cause misfire. Use misfire counters, freeze-frame data and appropriate tests to narrow the cause. A flashing malfunction light can signal a misfire that may damage the catalyst.
Sources and interpretation [1]
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
11Original wording in English
AUDI
Reported code forms P0306
This bulletin provides information when the MIL is illuminated, cylinder misfires; P0300, P0301, P0302, P0303, P0304, P0305, P0306
AUDI
Reported code forms P0306
This bulletin provides information for when the MIL is illuminated, DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306.
AUDI
Reported code forms P0306
This bulletin requests that technicians create a Pending Service Solutions record in the Pending Service Solutions Database in instances where there are misfires with DTCs P0300 through P0306.
AUDI
Reported code forms P0306
This bulltin provides information for when the MIL, cylinder misfires, DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306.
AUDI
Reported code forms P0306
This bulletin provides information for when the MIL is on and DTCs P0300, P0301, P 0302, P0303, P0304, P0305, or P0306 may be stored.
AUDI
Reported code forms P0306
This bulletin requests that technicians open a PSS record when the MIL is illuminated and DTCs P0300 - P0306 may be stored.
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Sources and interpretation
These explanations are editorial summaries of the linked manufacturer material. PDF page numbers count from the first file page. Original publications are in English; translations are reference aids. A cited edition is not a claim that it is the manufacturer's latest instruction.
- 01 13 14 / 2033805 · Engine, Misfire Diagnostic Aid ↗
Volkswagen Group of America · PDF page(s) 1, 2 ·
- 2024–2025 MY OBD System Operation Summary for Gasoline Engines ↗
Ford Motor Company · PDF page(s) 9, 10 ·
Source check date · 2026-10-27
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.