My 2002 Nissan Altima 2.5 engine has a trouble code P 0302 engine misfire cylinder 2 misfire. Whay could possibly be the cause of this.

Second one from the front of engine where the belts and pulleys are.

the fuel smell is from unburnt fuel in the cylinders not firing , i'd have to start with reading the OBD codes to help narrow down the component/s at fault but at a guess i'd think the ign coils are at fault but the OBD will pinpoint the issue

code p0302 refers to misfire detected cylinder 2===causes --engine mechanical fault--wiring---ignition/ fuel system---injector--ECT/MAF sensor---ECM
check the injector is working ok

how did you find out it is the injector causing the problem? the injectors are wired in series on these vehicles, it is possible that another faulty injector may be causing the problem. although it may be difficult to find if this happens intermittently. A scope test may be the only way to find the problem. Does the engine light come on with a misfire code on Cylinder #1? P0301 or r u just getting a random misfire code P0300 ? a bit more info on the vehicle may also be helpful........ engine size? # of cylinders 4 or 6 ?

Trouble Code: P0301

Cylinder No. 1, 2, 3 or 4 Misfire Detected

Trouble Code Conditions: Engine is running; atmospheric pressure, fuel level, battery voltage, engine speed, engine load are above minimal predetermined specifications; the engine is not in fuel cutoff and intake air temperature and coolant temperature are within normal operating ranges; there are no DTCs relating to ECT, CMP, CKP, MAP or IAT Sensor, to Crank rationality, to Crank Sensor Learn invalid, or to System Voltage. If total misfires detected are greater than 7% during the first 1000 rpm, or are over 3% after the first 1000 rpm, or are 25% during any 200 rpm with suspect cylinder misfire counter more than 80% and no other cylinder misfire counters above 80%, this DTC will set. The MIL will flash after first trip occurrence and will be steady after second trip.

Possible Causes:


Fuel system problems existErratic CMP or CKP Sensor signalsIgnition system problems existEngine mechanical problems existPCM has failed

Trouble Code: P0302

Cylinder 2 Misfire Detected

Possible Causes:


Air leak in the intake manifold, or in the EGR or PCV systemBase engine mechanical fault that affects only Cylinder 2Fuel delivery component fault that affects only Cylinder 2 (i.e., a contaminated, dirty or sticking fuel injector)Ignition system problem (coil or plug) that affects Cylinder 2

P0302 - is a cylinder #2 misfire. This could be a possible # 2 ignition coil or just the spark plug itself. What exactly is the "problem" that you are having?

Here is the cylinder arrangement for that engine.

These are cylinder misfire codes meaning ;
P-0300 = RANDOM OR MULTIPLE MISFIRE
P-0302 =CYLINDER #2 MISFIRE
P-0305 =CYLINDER #5 MISFIRE
Check spark plugs, wires, and coil(s)

17704/P1296/004758
if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 17704/P1296/004758 - Error in Mapped Cooling System Possible Symptoms

• Cold start issues

Possible Causes

• Coolant Temperature Sensor (G62) faulty
• Coolant Thermostat faulty

Possible Solutions

• Check Coolant Temperature Sensor (G62)
• Check Coolant Thermostat

16686/P0302/000770 Contents if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 16686/P0302/000770 - Cylinder 2 Misfire Detected Possible Causes

• Ignition system
• Fuel injectors
• Fuel pressure
• Running out of fuel
• EVAP canister purge valve
• Evaporative emission system
• Low compression
• Base engine problems
• Controle Module damaged

Special Notes

• This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.