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 wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0300RANDOM MISFIRE DETECTEDManufacturer communications
8Original wording in English
FORD, MERCURY
Reported code forms P0300
MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0316 OR P030X - NO CRANK BATTERY DISCHARGED. *TT
FORD, MERCURY
Reported code forms P0300
COLD ENGINE HARD START/NO START AND/OR SLIGHT SURGING AT IDLE. DIAGNOSTIC TROUBLE CODE P0300 (MISFIRE). 3.0L 2-VALVE ENGINE (GAS AND FFV). *TT
FORD, MERCURY
Reported code forms P0300
MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0300 (RANDOM MISFIRE DETECTED). *TT
FORD, MERCURY
Reported code forms P0300
SOME VEHICLES EQUIPPED WITH 3.0L 2V ENGINE BUILT DURING JULY AND AUGUST 1997 MAY EXHIBIT A RANDOM MISFIRE CODE P0300. THIS MAY BE CAUSED BY THE DRIVEN SPROCKET IN THE TRANSAXLE. *TT
FORD, MERCURY
Reported code forms P0300
SOME VEHICLES EQUIPPED WITH 3.0L 2V ENGINES BUILT DURING JULY AND AUGUST 1997 MAY EXHIBIT A RANDOM MISFIRE CODE P0300. THIS MAY BE CAUSED BY THE DRIVEN SPROCKET IN THE TRANSAXLE. *TT
FORD, MERCURY
Reported code forms P0300
MALFUNCTION INDICATOR LAMP (MIL) - DIAGNOSTIC TROUBLE CODES (DTCS) P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, AND/OR P0308 STORED IN MEMORY. *TW
Check vehicle applicability
5A 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.