Could be a bad ignition coil each cylinder has its own
Auto Zone will check your computer codes for FREE...
301 means #1 cylinder has a misfire check plug or coil
po301 means cylinder 1 misfire
Type your answer here... An engine cylinder misfire has been detected in cylinder # 4 firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
Trouble code P0301 means: Cylinder 1 Misfire Detected
Trouble code P0302 means: Cylinder 2 Misfire Detected
Trouble code P0301 means: Cylinder 1 Misfire Detected
P0303 : misfire cylinder #3
Was an intake manifold gasket for me.
Cylinder #1 misfire.
If the check engine light is flashing that means an engine cylinder misfire has been detected
If the check engine light is flashing that means an engine cylinder misfire has been detected