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

Vauxall astra po304 put a coil pack on still miss firing on no 4 cylinder

po304

ponijac po304

NothIng

IT RAN 10 TO 20 SECONDS, NO MISFIRE, THEN TURNS OFF INJECTOR PULSE TO #4. ALSO TURNS ON TRACTION CONTROL LIGHT. GOOD COMPRESSION @ 140 LBS. WILL SMOKE AT IDLE WHILE MISFIRING. CHAGED ECM, RAN GREAT FOR 4 MIN. THEN SAME ISSUE.

Toyota Corolla
I have toyota corolla 2010 with po304 code, tried to check and inter change all ignition coil but still it's the same code showing up. My vsc light blinks . I don't know what the problem is and I don't feel and see other any symptoms, need help


car ok on idle but misfires when put in drive. scanned and it showed a p0304 code.

2008 hyundai accent 1.6 liter - 120,000 miles Sudden rough idle - check engine light on code po304 No repairs attempted

Hyundai Accent
2003 1.6L DOHC. Replaced spark plugs, wires, coils. Ran 5 quarts of Berrymans B12 through 5 tanks of gas. Cleared and reset computer. Light returned, intermittent. Noticed it only turns on after it warms up and at idle. Only code for cylinder #4 comes up, no other. Am continuing to troubleshoot, towards vacuum leak, or MAF, or Purge Valve, then will try Cam and Crank position sensors, Although it would seem to me that these items would cause wide spread misfiring and not just on #4.


flashing check engine light

Toyota Corolla I have toyota corolla 2010 with po304 code, tried to check and inter change all ignition coil but still it's the same code showing up. My vsc light blinks . I don't know what the problem is and I don't feel and see other any symptoms, need help

Toyota Corolla
Toyota Corolla I have toyota corolla 2010 with po304 code, tried to check and inter change all ignition coil but still it's the same code showing up. My vsc light blinks . I don't know what the problem is and I don't feel and see other any symptoms, need help


Rough running engine ,knocking noise coming from engine intermittren

bogs down when getting on free way or going up hill

Dodge 1500
It started back barn


520204'1



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Other Comments

P0882 The transmission don't change gears

P0842 Check engine light came on. Diagnostic shows code p0843. Xc90 volvo 2004

P0702 p0949

P0974 Suzuki XL7
p0974


P0705 p0974



Other Check Engine Light Codes

P0037   HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
P0157   O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0221   Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Performance Problem
P0224   Throttle/Pedal Position Sensor/Switch 'B' Circuit Intermittent
P0286   Cylinder 9 Injector Circuit High
P0745   Pressure Control Solenoid 'A'
P0749   Pressure Control Solenoid 'A' Intermittent
P0877   Transmission Fluid Pressure Sensor/Switch "D" circuit Low
P0878   Transmission Fluid Pressure Sensor/Switch "D" circuit High
P0931   Gear Shift Lock Solenoid Control Circuit High




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