P0302 Code: Nissan Rogue (2021-2024) - Causes, Symptoms & Fixes

CODE MEANING AND SEVERITY

• What P0302 means: OBD-II trouble code P0302 indicates a misfire detected in cylinder 2. The engine control unit (ECU) monitors each cylinder for consistent combustion; when cylinder 2 isn’t firing correctly, the code P0302 is set.
• Severity for a 2021-2024 Nissan Rogue: A cylinder misfire can create rough running, reduced power, and vibrations. If the misfire persists, it can lead to increased fuel consumption, elevated emissions, and potential damage to the catalytic converter. It may also cause stalling in some conditions. Treat as a legitimate issue that requires diagnosis and repair, not a temporary nuisance.
• NHTSA data context (from the provided data): The supplied dataset for 2021-2024 Nissan Rogue shows one owner complaint of P0301 (cylinder 1 misfire) with stalling; no recalls are listed. This means the dataset there does not provide a P0302 record or Nissan-specific bulletin for this exact code. No recalls found in NHTSA database.

COMMON CAUSES ON NISSAN ROGUE

• Ignition system
  • Faulty spark plug on cylinder 2 (worn, fouled, or improper gap)
  • Defective ignition coil on cylinder 2 or a weak coil pack
  • Faulty ignition coil wiring/connectors or a corroded connector
• Fuel delivery and injection
  • Faulty or sticky fuel injector for cylinder 2
  • Low or unstable fuel pressure affecting injector performance
• Air and vacuum management
  • Vacuum leak near cylinder 2 intake path or around intake manifold/gaskets
  • Mass air flow (MAF) sensor or intake air leaks altering air-fuel mix
• Internal engine/valve issues
  • Low compression in cylinder 2 due to valve issue, piston ring wear, or head gasket problems (less common but possible)
• Electrical and sensor/ECU factors
  • PCM/control wiring faults, miscommunication, or intermittent sensor signals affecting cylinder 2
• Other related factors
  • Dirty or degraded fuel (fuel quality) or contaminated intake air
  • PCV system problems

SYMPTOMS

• Engine runs rough or shakes, especially at idle
• Loss of engine power or hesitation during acceleration
• Check Engine Light (CEL) on; continuous P0302 or intermittent misfire indications
• Increased fuel consumption or reduced miles per gallon
• Potential stalling or near-stalling situations in low-speed or idling
• Possible secondary codes such as P0300 (misfire detected in multiple cylinders) if there are intermittent issues

DIAGNOSTIC STEPS

Note: Use caution and proper safety practices. If you’re not comfortable with diagnostics, seek a professional.

• Step 0: Confirm and document

  • Retrieve trouble codes with a scanner, note whether P0302 appears alone or alongside other misfire codes (e.g., P0300, P0301, P0303, P0304).
  • Review freeze-frame data to see RPM, load, and engine conditions when the misfire occurred.

• Step 1: Visual inspection

  • Inspect the spark plug on cylinder 2 for wear, gap, oil fouling, or damage.
  • Inspect the ignition coil/coil-on-plug boot for cracks, heat damage, or corrosion at the connector.
  • Check the cylinder 2 fuel injector wiring connector and harness for damage or looseness.

• Step 2: Perform a controlled swap test (cylinder-to-cylinder swap)

  • Swap the spark plug and/or the ignition coil from cylinder 2 with another cylinder (e.g., swap coil from 2 to 3 or swap plugs if applicable) and re-scan after a drive.
  • If the misfire follows the spark plug or coil to the new cylinder, the component is likely defective (plug or coil). If the misfire remains on cylinder 2, suspect wiring, injector, compression, or a cylinder-specific issue.

• Step 3: Inspect and service the ignition components

  • Replace the spark plug on cylinder 2 if it’s worn, fouled, or has an incorrect gap. Use the OEM-recommended heat range and gap specification.
  • If the coil appears damaged or tests weak (via resistance checks or functional test), replace the coil on cylinder 2.

• Step 4: Check the fuel system for cylinder 2

  • Verify fuel pressure is within spec for the Rogue’s 2.5L engine using a proper fuel pressure gauge.
  • Test the injector for cylinder 2: listen for clicking with a stethoscope, perform a noid light test to confirm injector drive signal, or perform an injector balance/test to evaluate spray pattern and flow.
  • If injector performance is suspect, consider cleaning or replacing the injector for cylinder 2.

• Step 5: Air and vacuum integrity

  • Perform a vacuum leak test around the intake manifold, gaskets, PCV valve, and hoses near cylinder 2.
  • Check for intake manifold, throttle body, and MAF sensor cleanliness and proper operation.

• Step 6: Mechanical/engine health checks

  • If ignition and fuel systems test normal, perform a compression test (or a leak-down test) on cylinder 2 and compare to the other cylinders.
  • If compression is low in cylinder 2, investigate mechanical issues such as valve seating, piston ring wear, or head gasket concerns.

• Step 7: Electrical/ECU considerations

  • Inspect wiring harnesses and connectors to the ignition coil and injector for any damage or corrosion.
  • If all hardware checks out, consider ECU/PCM wiring concerns or software updates as a last resort, ideally under professional guidance.

• Step 8: Validation after repair

  • Clear codes, run the engine to operating temperature, and ensure P0302 does not return during a road test and multiple drive cycles.

RELATED CODES

• P0300: Random/Multiple Misfire Detected (misfires in more than one cylinder)
• P0301: Cylinder 1 Misfire Detected
• P0303: Cylinder 3 Misfire Detected
• P0304: Cylinder 4 Misfire Detected
• Other related codes to watch for if symptoms overlap: P0171/P0174 (fuel trim lean/rich conditions), P0305 (Cylinder 5 if present in V-engine variants), or P0306 (Cylinder 6 in V-configurations). For the Rogue 2.5L inline-4, focus primarily on P0300-P0304 family.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Note: Prices vary by region, vehicle trim, labor rates, and whether you use OEM or aftermarket parts. The ranges below reflect typical US shop pricing in 2025.

• Spark plug replacement (cylinder 2)

  • Parts: $2–$20 (depends on brand and heat range)
  • Labor: $50–$110
  • Total typical: $60–$130
  • When to do: if the plug is worn, fouled, or incorrect gap is detected

• Ignition coil replacement (cylinder 2)

  • Parts: $40–$120
  • Labor: $50–$150
  • Total typical: $90–$270
  • When to do: if coil is weak, damaged, or causes misfire after swap test

• Fuel injector service or replacement (cylinder 2)

  • Cleaning/ service (no disassembly): $40–$100
  • Injector replacement (if faulty): $120–$350 per injector (plus labor)
  • Total typical: $160–$500+
  • Note: If multiple injectors are suspected or if fuel pressure is low, cost can increase

• Fuel system and fuel pressure testing

  • Diagnostic/service time: $80–$150
  • Replacements tied to fuel pump or regulator are more expensive, often part of a larger fuel system repair

• Vacuum/PCV and gasket repairs

  • Parts: $10–$200 (depending on gasket and valve cover components)
  • Labor: $60–$200
  • Total typical: $70–$$400

• Compression/engine mechanical fixes (if needed)

  • Minor valve/seal work: $500–$1,500 (labor-dependent)
  • Major engine work or rebuild: $2,500–$6,000+
  • These are last-resort scenarios if a mechanical problem is confirmed

• Diagnostic-only costs

  • If you’re seeking a diagnosis without repair, expect diagnostic charges in the range of $80–$150 (or higher in some shops). Some shops roll diagnostic fees into the repair bill if you proceed with the repair.

DIY VS PROFESSIONAL

• DIY-friendly aspects

  • Replacing a faulty spark plug on cylinder 2 and possibly the ignition coil is within many home mechanics’ skill sets.
  • A basic swap test (coils/plugs) and visual inspection can be done with common hand tools and a basic OBD-II scanner.
  • Pros: lower labor cost, quick iterations, helpful learning experience.

• DIY limitations and cautions

  • Fuel system testing (pressure testing, injector balance) and compression tests require appropriate tools and knowledge.
  • If the misfire is due to valve, piston, or head gasket issues, professional diagnosis is essential.
  • Always disconnect the battery and follow safe procedures for high-voltage ignition components.

• When to go professional

  • If repeated misfire persists after swapping plugs/coils, or if you cannot confidently perform fuel pressure tests, compression tests, or leak-down tests.
  • If you observe rough running under load, stalling, or the CEL is on with multiple codes besides P0302.
  • If you’re not equipped for potential fuel system work or engine mechanical testing.

PREVENTION

• Regular maintenance

  • Replace spark plugs at the manufacturer-recommended intervals using OEM-recommended heat range and gap.
  • Use high-quality ignition coils as needed; avoid low-cost, questionable coils if trouble recurs.
  • Replace the air filter and ensure the MAF sensor is clean; dirty air intake can contribute to misfires.

• Fuel system care

  • Use good-quality fuel and consider a reputable fuel system cleaner (per manual guidance) occasionally to help keep injectors clean.
  • If fuel quality is uncertain or storage is poor, perform a fuel system cleaning or injector service as preventive maintenance.

• Vacuum and PCV health

  • Inspect hoses, gaskets, and PCV valve during routine maintenance for leaks or cracks.

• Driving habits

  • Avoid prolonged low RPM operation and abrupt high-load driving if you have a misfire history; allow the engine to reach proper operating temperature and avoid harsh driving until resolved.

• Software and sensors

  • Keep vehicle software updated as per Nissan service advisories. If a misfire is suspected due to sensor faults, a software update may be advised by a dealer.

Important notes based on the provided data

• The given NHTSA data for 2021-2024 Nissan Rogue includes one owner complaint of P0301 (cylinder 1 misfire) with stalling and two replaced cooling-system components without resolution noted. There are no recalls listed in the data you supplied.
• Because the data set does not contain a P0302 entry, diagnostic steps above focus on general misfire diagnosis for cylinder 2 and the Rogue’s typical maintenance and repair practices. If you have a P0302 code in your vehicle, treat it with the same diagnostic discipline described, but with emphasis on cylinder 2 components (plug, coil, injector, and cylinder health).