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 MISFIREManufacturer communications
9Original wording in English
FORD
Reported code forms P0300
Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300 and/or P0316 stored in the powertrain control module (PCM)…
FORD, LINCOLN
Reported code forms P0300
Some 2025-2026 Explorer/Aviator/Police Interceptor Utility non-hybrid vehicles built on 06-Feb-2025 and through 13-Dec-2025 may exhibit various drivability symptoms including a rough idle or hesitation shortly after…
FORD, MERCURY
Reported code forms P0300
MIL ON AND/ OR RUNS ROUGH/MISFIRE DTCS P0300-P0308 P0316 AND OR P0171/P0174 4.6L ENGINE. *EH
FORD, MERCURY
Reported code forms P0300
RUNS ROUGH OR MISFIRE - DIAGNOSTIC TROUBLE CODES P0300-P0308 OR P0316. *TT
FORD, MERCURY
Reported code forms P0300
SOME VEHICLES EQUIPPED WITH THE 4.0L SOHC ENGINE MAY EXHIBIT A CHECK ENGINE LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0300 (RANDOM MISFIRE) OR P0301. *TT
FORD, MERCURY
Reported code forms P0300
INFORMATION REGARDING MALFUNCTION INDICATOR LIGHT ILLUMINATING WITH DIAGNOSTIC TROUBLE CODE P0300/P0301.*YH
Check vehicle applicability
13A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | EXPLORER | 2026 |
| Ford | EXPLORER | 2025 |
| Ford | EXPLORER | 2005 |
| Ford | EXPLORER | 2004 |
| Ford | EXPLORER | 2003 |
| Ford | EXPLORER | 2002 |
| Ford | EXPLORER | 2001 |
| Ford | EXPLORER | 2000 |
| Ford | EXPLORER | 1999 |
| Ford | EXPLORER | 1998 |
| Ford | EXPLORER | 1997 |
| Ford | EXPLORER | 1996 |
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.