P0301 Code: Chevrolet Cruze (2016-2019) - Causes, Symptoms & Fixes

No recalls found in NHTSA database for this make/model/year. No NHTSA complaints were listed for P0301 on a 2016–2019 Chevrolet Cruze in the data you provided. This guide leverages general automotive diagnostic knowledge alongside the Cruze’s common configurations to help you diagnose P0301 on a 2016–2019 Cruze.

CODE MEANING AND SEVERITY

• What P0301 means: P0301 is an OBD-II stored/misfire code indicating a combustion misfire in cylinder 1. The engine control module (ECM/PCM) detects that cylinder 1 is not producing normal combustion.
• Why it matters: A persistent misfire can cause rough idle, loss of power, and increased emissions. If left unresolved, it can damage the catalytic converter and other exhaust sensors, and in turbo engines can stress the turbo and exhaust system.
• Severity range:
  • Mild, intermittent misfire: rough idle, occasional stumble, minimal power loss, possible temporary MIL illumination.
  • Persistent misfire: noticeable loss of power, rough operation, poor fuel economy, potential catalytic converter stress, may trigger CEL and driving restrictions if the condition worsens.
• Notes for Cruze: In the 2016–2019 Cruze (commonly 1.4L turbo Ecotec in North America), cylinder 1 misfires are most often linked to ignition or fuel delivery on that cylinder, but mechanical causes (compression) are possible as well.

COMMON CAUSES ON CHEVROLET CRUZE

• Ignition subsystem
  • Faulty ignition coil on cylinder 1 or a bad coil boot/connector.
  • Faulty spark plug on cylinder 1 (worn, fouled, or mis-gapped).
  • Spark plug boot or coil harness damage causing weak/no spark.
• Fuel delivery subsystem
  • Faulty or dirty fuel injector for cylinder 1 (clogged spray pattern or intermittent spray).
  • Low fuel pressure or fuel delivery issue affecting cylinder 1.
• Air and vacuum
  • Intake manifold vacuum leak near cylinder 1, or a leak elsewhere affecting cylinder balance.
  • Dirty or failing mass airflow (MAF) sensor or dirty throttle body causing incorrect fuel Trim.
• Mechanical/related
  • Low compression in cylinder 1 due to valve or piston issues, head gasket leak, or ring wear.
  • Carbon buildup on intake/injector affecting cylinder 1 performance (less common, but possible).
  • Wiring or PCM/control issues (less common but possible in older/high-mileage units).
• Other related items
  • Spark plug/coil compatibility issues after maintenance; incorrect torque on spark plug, or cross-threading.
  • Aftertreatment or exhaust concerns can amplify symptoms, but primary P0301 causes are typically ignition, fuel, or compression on cylinder 1.

SYMPTOMS OF P0301 (COMMON IN Cruze)

• Check Engine Light or MIL illuminated with code P0301 stored.
• Rough idle, engine shake, or vibration when stopped.
• Reduced engine power, hesitation, or limp-like feel under acceleration.
• Decreased fuel economy and slightly higher exhaust emissions.
• Possible misfire symptoms more noticeable at idle or under load (e.g., climbing hills) and sometimes only at certain temperatures or RPM.
• In turbo-equipped Cruzes, you may notice a stumble or less responsive throttle response if misfire is persistent.

DIAGNOSTIC STEPS (PROCEDURE SUMMARY)

Note: Begin with basic safety and data collection. Use a capable scan tool and, if possible, a data stream that shows misfire counters, fuel trims, and rpm.

• Step 1: Verify the code and context

  • Confirm P0301 is current and not a pending code. Note freeze-frame data (RPM, speed, load) to understand operating conditions when misfire occurred.
  • Check related codes (P0300, P0302, P0303, P0304, P0305) to see if misfire is cylinder-wide or isolated to cylinder 1.

• Step 2: Visual inspection

  • Inspect spark plug on cylinder 1: condition, gap, fouling, oil contamination.
  • Inspect ignition coil for cylinder 1 and its wiring/connector for cracks, corrosion, or wear.
  • Inspect around cylinder 1 for vacuum leaks (vacuum hoses, intake manifold gasket, PCV path).
  • Check for oil on the spark plug or signs of coolant/oil leaks.

• Step 3: Spark and ignition checks

  • Swap test: Move the spark plug and/or ignition coil from cylinder 1 to another cylinder (e.g., swap cylinder 1 with cylinder 3) and clear codes. If the misfire follows the plug/coil, the component is at fault.
  • If not easily swappable (coil-on-plug setup), test coil resistance with a multimeter and inspect secondary resistance per service data.

• Step 4: Fuel delivery checks

  • Check fuel pressure with a reliable gauge to ensure spec pressure is being delivered to the rail.
  • If possible, test injector operation (sound/noid test, voltage at injector when the cylinder is commanded to fire; inspect injector resistance for cylinder 1).
  • Swap test: If feasible, swap the cylinder 1 injector with another cylinder’s injector and see if the misfire follows the injector.

• Step 5: Compression and mechanical checks

  • Perform a compression test on cylinder 1 and compare with the other cylinders. A significant deviation indicates mechanical issues (piston, rings, valves, head gasket).
  • If compression is low, consider a wet compression test or a leak-down test to isolate the issue.

• Step 6: Data and sensor checks

  • Review fuel trims (short and long term) at idle and when it’s misfiring. Consistently high or leaning trims may indicate fueling or air intake path issues.
  • Check MAF, MAP/ BARO, and EGR operation for aberrant readings that could cause a misfire-like condition.
  • Inspect engine harnesses and connectors to the coil and injector for corrosion or damage.

• Step 7: Decide on repair path

  • If ignition is at fault: replace coil on cylinder 1 or spark plug on cylinder 1 as indicated by test results.
  • If fuel delivery is at fault: replace injector (cylinder 1) or repair fuel supply issues, and recheck fuel pressure.
  • If mechanical issue is found: address compression/valve/piston problems; this may require more extensive engine service.
  • After any repair, clear codes and perform a road test to ensure the misfire no longer occurs.

RELATED CODES

• P0300: Random/Multiple Cylinder Misfire Detected
• P0302: Cylinder 2 Misfire
• P0303: Cylinder 3 Misfire
• P0304: Cylinder 4 Misfire
• P0305: Cylinder 5 Misfire (if applicable to other engines in the Cruze family; some markets have 4-cylinder engines, so P0305 may not apply on all configs)
• P0351 to P0354: Ignition Coil Primary/Secondary Circuit Malfunctions (if coil 1 or its circuit is suspected)
• P0131/P0133 (rarely linked directly but can appear with sensor-related fuel mixture issues)

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices are approximate ranges in USD for typical North American market service work on a 2016–2019 Chevrolet Cruze. Actual prices vary by region, shop rate, and exact engine configuration (1.4L turbo is common for this model).

• Spark plug replacement (cylinder 1)

  • Parts: $2–$20 per plug (expect 1 plug for cylinder 1; 4 plugs total if you do a full set)
  • Labor: 0.5–1.0 hours
  • Typical total: $60–$180 per cylinder set; often $100–$220 for all four if doing all plugs

• Ignition coil replacement (cylinder 1)

  • Parts: $40–$150 for a single coil (OEM higher)
  • Labor: 0.4–1.0 hours
  • Typical total: $100–$250

• Fuel injector replacement or cleaning (cylinder 1)

  • Parts: $100–$250 for a new injector
  • Labor: 1.0–2.0 hours
  • Typical total: $200–$600
  • Note: Cleaning with a fuel system additive is cheaper but less certain than replacement if the injector is truly clogged.

• Fuel system pressure test and related checks

  • Parts: n/a (service)
  • Labor: 0.5–1.5 hours
  • Typical total: $75–$150

• Compression test / leak-down test

  • Parts: n/a
  • Labor: 0.5–1.5 hours
  • Typical total: $60–$180

• Vacuum/air path repair (intake gasket, PCV, hoses)

  • Parts: $10–$100 (depends on gasket/hoses)
  • Labor: 0.5–1.5 hours
  • Typical total: $80–$250

• Mechanical repair (head gasket, valve, piston, ring repair)

  • Parts: highly variable; gasket kits, bore/valve work
  • Labor: 4.0–12.0+ hours depending on severity
  • Typical total: $1,000–$4,000+ (often a major engine job)

• Comprehensive ignition/fuel path replacement (if multiple components fail)

  • Combined parts: $150–$800
  • Labor: 1.0–3.0 hours
  • Typical total: $400–$1,200

Notes:

• These ranges reflect typical shop pricing in 2025 and assume standard labor rates (often $80–$150 per hour depending on region and shop).
• If the misfire is resolved by replacing a single coil or a single spark plug, overall cost will be toward the lower end. If it requires injector replacement or engine mechanical work, costs will be higher.

DIY VS PROFESSIONAL

• DIY suitability (for motivated, mechanically inclined enthusiasts)
  • Doable tasks:
    • Inspect and replace cylinder 1 spark plug.
    • Inspect or swap ignition coil on cylinder 1 to verify coil fault.
    • Basic vacuum leak checks with soapy water or spray around intake gaskets (careful with turbocharged models).
    • Quick fuel trims observation with a scanner to identify obvious fueling issues.
  • More advanced tasks (recommended to a professional):
    • Fuel injector testing/replacement on cylinder 1.
    • Fuel rail pressure checks or injector pulse testing.
    • Compression or leak-down testing to diagnose mechanical issues.
    • ECU/wiring harness diagnosis for intermittent electrical faults.
• When to call a pro
  • If you are not comfortable with high-pressure fuel system work or compression testing.
  • If ignition and basic fuel checks do not identify the fault after reasonable troubleshooting.
  • If you suspect mechanical engine issues or a possible head gasket, valve, or piston problem.
  • If you’re experiencing repeated misfires across multiple cylinders after initial fixes.
• Tools to consider owning or having access to
  • OBD-II scanner with live data and misfire counters
  • Spark plug socket, torque wrench
  • Basic multimeter for coil testing
  • Fuel pressure gauge or noid light for injectors
  • Compression tester and optionally a leak-down tester
  • Safety equipment and proper ventilation for fuel-system work

PREVENTION

• Regular maintenance
  • Follow Chevrolet/GM recommended service intervals for spark plugs (typical life for many GM spark plugs is around 100,000 miles for long-life plugs; check your owner’s manual for exact specification on your engine).
  • Replace ignition coils sparingly if they show signs of weakness (misfire during ignition switch-on tests, increasing misfire counts in scanning data).
  • Replace air filters and clean MAF sensor as needed to ensure accurate air measurement.
  • Keep fuel system clean with a reputable fuel system additive only as recommended; do not rely solely on additives to cure a mechanical misfire.
• Fuel quality and driving habits
  • Run quality fuel; avoid frequent low-fuel operation if possible, as debris from tanks can accumulate and clog injectors.
  • Avoid aggressive driving for long periods if you’re fighting misfires; allow the engine to reach proper operating temperatures and cycles to prevent carbon buildup.
• Spark plugs and ignition system care
  • Use the correct type and gap for the Cruze’s spark plugs (as specified by GM). Use OEM or equivalent quality plugs.
  • Avoid overtightening spark plugs; use proper torque to prevent cross-threading or seizing.
• Monitoring and early action
  • If warning lights appear or rough idle returns, diagnose early to prevent catalyst damage and avoid further engine stress.

Data limitations and cautions

• The data provided shows no recalls or official complaints for P0301 on the 2016–2019 Cruze. No recalls found in NHTSA database and no owner complaints for this issue combination in the given data. This means the guide uses general diagnostic knowledge and Cruze-specific characteristics rather than model-year-specific NHTSA alerts. If you see new NHTSA information or TSBs (Technical Service Bulletins) specific to your vehicle, those should take precedence.
• Engine configurations vary by market; the Cruze’s common 1.4L turbo is the typical target for P0301 on this model/year, but always verify cylinder numbering and wiring for your exact engine code (RPOs may differ by region).