P0300 on a 2015 Nissan Rogue
P0300 is a generic OBD2 powertrain code for random or multiple cylinder misfire. Unlike P0301 through P0308, it does not point to one specific cylinder, so the cause can be ignition, fuel, air, sensor, or mechanical.
Not your vehicle? See general P0300 info.
Most common causes on the 2015 Nissan Rogue
Ranked from 546 NHTSA owner complaints filed for this vehicle.
- 1
Electrical Harness or Power Relay Issues
High severityLoose pins in the power relay box or damaged wiring harnesses can cause intermittent voltage drops to the ignition coils or fuel injectors, leading to random misfires and engine stalling.
Reported in 2 NHTSA complaints - 2
Cracked Plastic Intake Manifold / Vacuum Leaks
Medium severityThe plastic intake manifold can crack or warp, allowing unmetered air into the engine. This creates a lean air/fuel mixture that causes random misfires and rough idling.
Reported in 1 NHTSA complaint - 3
Faulty Oxygen (O2) Sensor
Medium severityAn upstream oxygen sensor that provides inaccurate readings will cause the engine computer to incorrectly adjust the air/fuel ratio, potentially leaning out the mixture enough to cause random misfires.
Reported in 1 NHTSA complaint - 4
Engine Control Module (ECM) Software or Hardware Issue
Medium severityOutdated ECM software or internal module faults can lead to improper timing, fuel delivery, or spark control, resulting in engine stalling and random misfire codes.
Reported in 1 NHTSA complaint - 5
Worn Spark Plugs
Low severitySpark plugs are a standard wear item. As the electrodes wear down, the spark weakens, leading to incomplete combustion and random misfires across multiple cylinders.
Common cause - 6
Faulty Ignition Coils
Medium severityIgnition coils degrade over time due to engine heat and electrical stress. A weak or failing coil-on-plug will fail to ignite the air/fuel mixture properly, triggering a P0300 code.
Common cause - 7
Dirty or Failing Mass Air Flow (MAF) Sensor
Medium severityA contaminated MAF sensor incorrectly measures the amount of air entering the engine. This causes the ECM to inject the wrong amount of fuel, leading to a lean condition and random misfires.
Common cause - 8
Low Fuel Pressure or Clogged Fuel Injectors
High severityIf the fuel pump is failing or injectors are clogged, the engine will not receive enough fuel. This lean condition affects all cylinders, triggering a random/multiple cylinder misfire code.
Common cause
These causes are aggregated from NHTSA owner complaints and general repair knowledge — this is not a diagnosis. P0300 on your car still needs shop confirmation before any repair.
Common symptoms
- Flashing or steady check engine light
- Rough idle
- Shaking under acceleration
- Loss of power
- Fuel smell from exhaust
What to check before replacing parts
Scan for cylinder-specific misfire codes
Look for: A companion P0301–P0308 pins the misfire to one cylinder — start there. P0300 with no cylinder code points at something hitting several at once: fuel pressure, a large vacuum leak, or timing.
Inspect the spark plugs and coils
Look for: Pull the plugs: black/sooty = rich, oily = oil intrusion, white/blistered = lean or overheating, cracked porcelain or an out-of-spec gap = replace. Then swap a coil to another cylinder — if a cylinder-specific code follows the coil, the coil is bad.
Check fuel trims for a vacuum leak
Look for: High positive short- and long-term trims (worst at idle, improving as RPM rises) mean unmetered air is getting in. Smoke-test the intake and listen for hissing.
Verify fuel pressure
Look for: Compare running/cranking pressure to the vehicle spec. Low or dropping pressure starves multiple cylinders and reads as a random misfire — suspect the pump, filter, or regulator.
Compression / leak-down test if ignition and fuel check out
Look for: A cylinder 15%+ below the others, or leak-down hissing from the intake (intake valve), exhaust (exhaust valve), or oil filler (rings), means the misfire is mechanical — not a swap-in part.
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