P0300: Random Misfire
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
P0300 - RANDOM MISFIRE
| Description: | The random misfire DTC indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring. | ||
| Possible Causes: |
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| Diagnostic Aids: | One or more EGR passages may be blocked or partially blocked. If this is the case the misfire detection monitor indicates the EGR port to check for possible blockage. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | - | GO to PINPOINT TEST HD: MISFIRE DETECTION MONITOR Step 1. |