P0304 means the # 4 engine cylinder is misfiring
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On a 1998 Ford Explorer :
4.0 liter V6 engine ( OHV and SOHC )
firewall
3 - 6
2 - 5
1 - 4
front of vehicle
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5.0 liter V8 engine
firewall
4 - 8
3 - 7
2 - 6
1 - 5
front of vehicle
the code p0304 is cylinder 4 misfire detected
Code P0304: Misfire at cylinder 4 detected.
A misfire has been detected in engine cylinder # 4
My Chilton repair manual shows OBD II code P0304 as ( misfire detection monitor and / or circuit fault ) and my Haynes repair manual shows OBD II code P0304 as ( cylinder no. 4 misfire detected )
Trouble code P0304 means: Cylinder 4 Misfire Detected
OBD code P0304 is Cylinder Four Misfire.
You need a OBD2 scanner/code reader to get stored codes and to erase them
Tansmission O/D band failure.
Trouble code P0304 means:Cylinder 4 misfire detected
bad vehicle speed sensor
a key...or the clicker? OR The code is on the door lock module that is located just ahead of the jack.
Trouble code P0304 means:Cylinder 4 misfire detected