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




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When did your Check Engine Light Come On?
Does your Car Start?
Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0325 Nissan Maxima
Sometimes when the car slows to a stop, the car dies. Idle set at 900 rpm. Car starts back right away.


P0325 Nissan Maxima
Sometimes when the car slows to a stop, the engine shits off. Can start it right backmupmafter.


P0180 engine lights not deleted

P0180 Volkswagen Touareg
p0180


P0304 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




Other Check Engine Light Codes

P0071   Ambient Air Temperature Sensor Range/Performance
P0392   Camshaft Position Sensor 'B' Circuit Low Input (Bank 2)
P0416   secondary Air Injection System Switching Valve 'B' Circuit Open
P0630   VIN Not Programmed or Mismatch - ECM/PCM
P0795   Pressure Control Solenoid 'C'
P0836   Four Wheel Drive (4WD) Switch Circuit
P0849   Transmission Fluid Pressure Sensor/Switch 'B' Circuit Intermittent
P0859   Traction Control Input Signal High
P0917   Gear Shift Position Circuit High
P0977   Shift Solenoid "B" Control Circuit High




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