P0304 OBD Engine Code Logo   Code #P0304 -
Cylinder 4 Misfire Detected

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A Check Engine Code of P0304 means that there was a misfire, specificially for Cylinder #4. You should check your spark plugs and spark plug wires and probably replace them, especially if have a Straight 4 Cylinder engine (very easy) or if Cylinder 4 is easily accessible. You should also check your catalytic converter to ensure its working properly and check your coils as well. You should also make sure that you wires are in the correct order as well.

Chevrolet Silverado 1500
Codes P0304, P0200, P0174


Suzuki Verona
What is the code p0304


Hyundai Accent
reduced power and idles rough


Lincoln Continental
MIS FIRES


Ford Expedition
replaced all spark plugs now has misfire # 4 cylinder


Toyota Tacoma
2001 yeay


car stumbles in drive and check engine light on

runs rough

Fiat Punto
code P0 304 ????


po304

Kia Optima
2004 kia optima po304 just started misfiring changed plug had core pack checked so it is geting fire but dont know if it is something else or what


Kia Sedona
idles rough


Po304 tried new wire new plugs new coil for spark plugs. Throttle position sensor. Still acting up why?

check engine light on, engine looses power on accerlation

Chevrolet Tahoe
Truck with vibrate and shake on eceleration getting on the freeway and up hills.


Suzuki SX4
Misfire in mid rpm range, half power at best, not safe to drive until repaired.


Ford Ranger
Definite miss, replaced wires, coil pack plugs and injector, with no improvement. Compression is low 90 psi in #4 cylinder.


Mush lighte on so far

Nissan Altima
Light on Sunday off Monday check it Sunday at auto store


Nissan Altima
Did get a tune up 2 year ago


check engine light came on suddenly. started missing really bad. this was on a weekend. after a day of driving light went off and it was only missing once in a while? check code showed po304?

Jeep Grand Cherokee
2011: driving about 30 mph. no noticeable symptoms. car still starts


Chrysler Town and Country
misfire


P0304

Nafa

Nafa

P0304

BMW 330i
P0304


Toyota Tercel
CILINDER 4 MISFAIRE


engine light on

2001 toyota corolla Code PO304. Intermittent misfire of cylinder 4. Changed spark plugs, coil, fuel injector, and performed a compression test. All cylinders 210.

Toyota Corolla
Light came on about 2 weeks ago. Car has no problem starting. Has a rough idle but seems to smooth out when driving.


p0304 p0328 p0331 bmw 325 ci 2005

replaced plugs,wires cap, rotor,upgraded spider injection to multiport injection ,replaced #4 plug twice always has black spot on center insulator check spark to #4 cylinder with test light when running it's getting spark keep getting po304 code after code is cleared out. engine malfuction light comes on when I leave it idle to long

GMC 1500
after I put a new plug in #4 cyl it idles smooth until misfire code comes on, than it has a slight rough idle


Also have dtc code p0133



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Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0135 rough idle when cold, poor gas mileage sometimes will set check engine Light at start up when cold

P0743 Volkswagen Golf
not shifting


P0561 p0561

P0174 Lexus ES 330
P0300 TRANSMISSIYA


P0174 Lexus ES 330
P0174




Other Check Engine Light Codes

P0126   Insufficient Coolant Temperature for Stable Operation
P0250   Turbo/Super Charger Wastegate Solenoid 'B' High
P0306   Cylinder 6 Misfire Detected
P0314   Single Cylinder Misfire (Cylinder not Specified)
P0326   Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
P0455   Evaporative Emission Control System Leak Detected (gross leak)
P0610   Control Module Vehicle Options Error
P0649   Speed Control Lamp Control Circuit
P0839   Four Wheel Drive (4WD) Switch Circuit High
P0871   Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance




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