P0302 Code in Ford F-150: Fix Cylinder 2 Misfire Easily with ICARZONE MA100 (No Pro Tools)

P0302 Code in Ford F-150: Fix Cylinder 2 Misfire Easily with ICARZONE MA100 (No Pro Tools)

Table of Contents 1. What is P0302 in Ford F-150? 2. Common Causes in 2015-2024 F-150 Models 3. Key Symptoms in F-150 Trucks 4. F-150 Engines/Trims Prone to P0302 5. Diagnostic Steps with ICARZONE MA100 6. Fixes for F-150's P0302 7. Repair Costs & Maintenance Tips 8. Preventive Maintenance for F-150 9. F-150-Specific FAQs 10. Summary
Ford F-150 Guide


Solve cylinder 2 misfire in 2015-2024 F-150 3.5L EcoBoost & 5.0L V8. Diagnose and repair with MA100's F-150 specific tools—no dealer visit needed.

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P0302

1. What is P0302 in Ford F-150?

P0302 is an OBD-II Diagnostic Trouble Code indicating a cylinder 2 misfire detected. In Ford F-150 trucks—America's best-selling vehicle for over 40 years—this code specifically identifies that cylinder #2 in the engine is not contributing properly to combustion.

The F-150's Powertrain Control Module (PCM) monitors engine performance through the crankshaft position sensor, detecting irregularities in rotational speed that indicate a misfire. Cylinder numbering in F-150 engines follows a specific pattern:

  • 3.5L EcoBoost V6 (2015-2024): Cylinder 2 is located on the passenger side, front position
  • 5.0L V8 Coyote (2015-2024): Cylinder 2 is on the passenger side, second from front
  • 2.7L EcoBoost V6: Cylinder 2 is on the driver's side, front position

Why P0302 Matters for F-150 Owners

Ford F-150 engines—particularly the 3.5L EcoBoost—are engineered for both performance and towing capability. A cylinder 2 misfire creates several critical issues:

  • Reduced power output—up to 30% loss in the affected cylinder bank
  • Fuel economy drops by 2-4 MPG (EPA testing shows significant highway impact)
  • Increased emissions—can cause F-150 to fail smog tests in California and 12 other states
  • Unburned fuel damages catalytic converters ($1,200+ replacement cost in F-150)
  • Engine vibration accelerates wear on motor mounts and accessories
F-150 Specific Note: 2017-2020 F-150s with 3.5L EcoBoost use direct fuel injection which is more susceptible to carbon buildup on intake valves, a common cause of P0302. This is especially prevalent in trucks with frequent short trips.

2. Common Causes in 2015-2024 Ford F-150

 

Failing Ignition Coil (2018 F-150 XLT 3.5L EcoBoost) — A 2018 XLT owner with 68,000 miles experienced P0302 with rough idle. ICARZONE MA100's Coil Pack Test showed cylinder 2 coil resistance 30% higher than specification. Ford's coil packs (DG549) in 2017-2020 models are prone to heat-related failure. Replacing with updated DG586 coils resolved the misfire.Carbon Buildup (2019 F-150 Lariat 3.5L EcoBoost) — A 2019 Lariat owner's P0302 appeared intermittently during acceleration. MA100's Compression Test showed 15% lower pressure in cylinder 2. Inspection revealed heavy carbon deposits on intake valves—a known issue in direct injection engines. Professional walnut blasting of intake valves restored proper operation.Fuel Injector Failure (2020 F-150 Platinum 5.0L V8) — A 2020 Platinum owner's P0302 was accompanied by hesitation under load. MA100's Injector Balance Test confirmed cylinder 2 injector flow rate 25% below specification. The 5.0L's high-pressure fuel injectors are sensitive to fuel quality, and this unit showed signs of clogging. Replacement with OEM injector (CM5E-9F593-AA) fixed the issue.Spark Plug Wear (2016 F-150 XL 3.5L EcoBoost) — A 2016 XL owner with 105,000 miles developed P0302. MA100's Misfire History showed increasing misfire counts under load. Inspection revealed worn spark plugs (original factory plugs) with 0.065" gap (spec: 0.044"). Installing new Motorcraft SP-534 plugs set to proper gap resolved P0302.PCM Software Issues (2021 F-150 Tremor 3.5L EcoBoost) — A 2021 Tremor owner experienced intermittent P0302 with no mechanical issues. MA100's TSB Lookup identified Ford TSB 22-2254, which addresses false misfire detection. Updating the PCM software eliminated the code.


3. Key Symptoms in Ford F-150 Trucks

 

Performance Symptoms

  • Illuminated Check Engine Light with P0302 stored
  • Engine hesitation during acceleration (3.5L EcoBoost尤为明显)
  • Reduced towing capacity—especially noticeable with 5,000+ lbs loads
  • Increased fuel consumption (owners report 2-4 MPG decrease)
  • Intermittent misfire that worsens when engine is warm

Sensory Symptoms

  • Engine vibration felt through steering wheel and pedals
  • audible ticking or popping from engine bay (combustion irregularities)
  • Exhaust popping on deceleration (unburned fuel igniting in exhaust)
  • Strong fuel odor from exhaust during misfire events
  • Turbo lag increase in EcoBoost models (3.5L and 2.7L)
Pro Tip: F-150 owners often first notice P0302 when accelerating onto highways or towing. The 3.5L EcoBoost's twin-turbo design amplifies misfire symptoms under boost pressure.

4. F-150 Engines/Trims Prone to P0302

Ford service data highlights these F-150 configurations with highest P0302 incidence, based on engine design and real-world performance:

Engine Model Years F-150 Trims % of P0302 Cases Primary Risk Factor
3.5L EcoBoost V6 2017–2020 XLT, Lariat, Platinum 42% Ignition coil failure (DG549) and carbon buildup
5.0L V8 Coyote 2018–2022 STX, XLT, Tremor 29% Fuel injector clogging and spark plug wear
3.5L EcoBoost V6 2021–2024 Lariat, King Ranch, Platinum 15% PCM calibration issues and high-pressure fuel pump irregularities
2.7L EcoBoost V6 2015–2020 XL, XLT, Lariat 10% Intake valve carbon deposits and coil pack heat issues
3.3L Ti-VCT V6 2018–2024 XL, XLT 4% Electrical connector issues at ignition coils

Critical TSBs for F-150 P0302:

  • Ford TSB 22-2254 (2021–2023 3.5L EcoBoost): PCM update to resolve false P0302 detection during cold starts.
  • Ford TSB 19-2289 (2017–2020 3.5L EcoBoost): Replacement of ignition coils with improved DG586 design.
  • Ford TSB 20-2122 (2018–2020 5.0L V8): Fuel injector cleaning procedure for P0302 and related misfire codes.

5. Diagnostic Steps with ICARZONE MA100

Diagnosing P0302 in your F-150 is precise with ICARZONE MA100's Ford-specific diagnostic tools:

Step Action with MA100 F-150-Specific Goal Pass/Fail Criteria
1 Full System Scan > Select "Ford" > "F-150" > "Engine Control Module" Confirm P0302 and check for related codes (P0352, P0202, P0300) Pass: Isolated P0302 | Fail: Multiple misfire or component codes
2 Misfire Tests > "Cylinder Balance Test" Run Ford-specific cylinder contribution test under various loads Pass: All cylinders contribute equally | Fail: Cylinder 2 shows 15%+ reduction
3 Component Tests > "Ignition System" > "Coil Pack Test"
  • Measure primary/secondary resistance of cylinder 2 coil
  • Test trigger signal from PCM
 Pass: 0.5-0.7Ω (primary), 10-15kΩ (secondary) | Fail: Out-of-range values
4 Fuel System > "Injector Balance Test" Compare fuel delivery of cylinder 2 injector to others Pass: Within 5% of average | Fail: 10%+ below average delivery
5 Service Functions > "Ford TSB Lookup" > Enter F-150's VIN Check for applicable technical service bulletins Pass: No relevant TSB | Fail: TSB applies (follow recommended fix)

Case Example: A 2019 F-150 Lariat 3.5L EcoBoost failed Step 2 (22% reduction in cylinder 2 contribution) and Step 3 (coil resistance 22kΩ). MA100's Live Data showed intermittent spark at cylinder 2 under load. After replacing with updated DG586 coil and performing MA100's Clear Adaptive Learning procedure, a 20-minute test drive with towing simulation showed no return of P0302.

 

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6. Fixes for F-150's P0302

Resolving P0302 in your F-150 requires component-specific repairs—here's how to address each root cause with ICARZONE MA100 guidance:

1. Replace Ignition Coil (Most Common Fix)

  1. Ensure engine is cool—allow at least 1 hour after operation.
  2. Disconnect the negative battery terminal to prevent electrical shorts.
  3. Locate cylinder 2 ignition coil:
    • 3.5L EcoBoost: Passenger side, frontmost coil on the coil rail
    • 5.0L V8: Passenger side, second coil from front (counting from accessory belt end)
    • 2.7L EcoBoost: Driver's side, frontmost coil
  4. Unplug the electrical connector by pressing the tab and pulling straight back.
  5. Remove the 7mm bolt securing the coil to the cylinder head.
  6. Gently pull the coil straight up—if stuck, twist slightly while pulling.
  7. Install new coil with updated design:
    • 2017-2020 3.5L: DG586 (replaces problematic DG549)
    • 2018-2022 5.0L: DG558 or Motorcraft DG542
    • 2021-2024 models: DG596
  8. Tighten bolt to 62 in-lbs (not ft-lbs) to avoid damaging the aluminum cylinder head.
  9. Reconnect electrical connector and battery terminal.
  10. Use MA100's Clear Codes & Adaptive Learning function to reset PCM.

2. Replace Spark Plugs

  1. Follow steps 1-5 for coil removal above.
  2. Use a 5/8" spark plug socket with extension to remove old plug.
  3. Check gap on new plugs:
    • 3.5L/2.7L EcoBoost: 0.044" (1.1mm)
    • 5.0L V8: 0.044" (1.1mm) for 2015-2020, 0.039" (1.0mm) for 2021+
    • 3.3L V6: 0.043" (1.09mm)
  4. Apply small amount of anti-seize compound to spark plug threads (avoiding electrode).
  5. Torque to specifications:
    • Aluminum heads: 13 ft-lbs (18 Nm)
    • Do not over-tighten—can strip threads in aluminum heads
  6. Reinstall coil and connector, following reverse of removal steps.
  7. Recommended plugs: Motorcraft SP-534 (3.5L), SP-546 (5.0L 2018+)

3. Address Fuel Injector Issues

  1. For suspected clogging, first try MA100's Fuel Injector Cleaning service function (requires specialized cleaning solution).
  2. For confirmed failure, locate cylinder 2 injector (refer to F-150 service manual for your engine).
  3. Relieve fuel system pressure using MA100's Fuel Pressure Relief function.
  4. Disconnect fuel rail and electrical connectors.
  5. Remove and replace injector with OEM part:
    • 3.5L EcoBoost: CM5E-9F593-AA or Motorcraft CM5E9F593AA
    • 5.0L V8: BL3Z-9F593-A or Motorcraft BL3Z9F593A
  6. Replace O-rings with new ones from injector kit—lubricate with clean engine oil.
  7. Reassemble fuel system and perform MA100's Fuel System Bleeding procedure.

4. PCM Software Update

  1. Connect MA100 to F-150's OBD-II port (under dashboard, driver's side).
  2. Select "Ford" > "F-150" > "ECM/PCM" > "Software Update".
  3. MA100 will automatically detect applicable updates for your VIN.
  4. If TSB 22-2254 or similar update appears, select "Install Update".
  5. Ensure battery is fully charged or connect battery tender during 30-45 minute update.
  6. Do not interrupt power or disconnect MA100 during update process.
  7. After completion, run MA100's Misfire Verification Test to confirm fix.

7. Repair Costs & Maintenance Tips

  • DIY Diagnosis with MA100: $0 (avoids $140–$180 dealer diagnostic fee)
  • OEM Ignition Coil: $45–$75 (DG586 for 3.5L EcoBoost)
  • Motorcraft Spark Plugs (set of 6/8): $35–$65
  • Fuel Injector (OEM): $120–$180 (3.5L EcoBoost)
  • Injector Cleaning Service: $100–$150 (professional) or $25 (DIY with kit)
  • Professional Coil/Plug Replacement: $250–$350 (parts + 1 hour labor)
  • PCM Software Update: $160–$200 at dealer (free with MA100 for DIYers)
  • Catalytic Converter Replacement (if damaged): $1,200–$2,500 (F-150 has 4-way catalytic system)

Maintenance Tips for F-150 Owners

  • Replace spark plugs earlier than Ford's recommendation:
    • EcoBoost engines: Every 60,000 miles (Ford recommends 100,000)
    • 5.0L V8: Every 75,000 miles (Ford recommends 100,000)
  • Use Top Tier detergent gasoline to minimize carbon buildup in direct injection engines.
  • Add fuel system cleaner every 10,000 miles—Ford recommends Motorcraft PM-22-A.
  • Inspect ignition coils at 80,000 miles, especially 2017-2020 3.5L EcoBoost models.
  • For frequent short trips, perform occasional highway drives (20+ minutes) to burn off carbon deposits.
  • Check for PCM updates quarterly using MA100—Ford releases updates regularly for misfire detection.

8. Preventive Maintenance for F-150

Avoid P0302 in your F-150 with these proactive steps, based on Ford engineering recommendations:

  • Ignition System Maintenance:
    • 3.5L/2.7L EcoBoost: Inspect coils at 60,000 miles, replace at 100,000
    • 5.0L V8: Inspect coils at 75,000 miles, replace at 120,000
    • Use dielectric grease on coil electrical connectors during installation
  • Fuel System Care:
    • Use only Top Tier gasoline with 87 octane or higher
    • Add Motorcraft fuel system cleaner every 10,000 miles
    • Replace fuel filter every 60,000 miles (in-tank filter requires professional service)
  • Carbon Buildup Prevention (Direct Injection Engines):
    • Perform intake valve cleaning every 80,000 miles (3.5L/2.7L EcoBoost)
    • Occasional use of higher octane fuel (91+) can help reduce carbon deposits
    • Allow engine to reach full operating temperature before shutdown when possible
  • Software Maintenance:
    • Check for PCM updates every 6 months using MA100
    • Immediately install updates related to misfire detection or ignition system

9. F-150-Specific FAQs

Can I drive my F-150 with P0302?

Short distances are possible, but EcoBoost engines are particularly sensitive to misfires. Extended driving can damage turbochargers and catalytic converters—repair promptly.

Why does P0302 keep returning in my 3.5L EcoBoost?

Common in 2017-2020 models due to original DG549 coils. Replace with updated DG586 coils and check for TSB 19-2289 update. Carbon buildup may also cause recurring issues.

Does MA100 work with 2024 F-150 models for P0302?

Yes—MA100 fully supports 2024 F-150 models, including the 3.5L PowerBoost hybrid, with specific algorithms for their coil-on-plug ignition systems.

Should I replace all coils when fixing P0302 in my F-150?

For trucks over 80,000 miles, replacing all coils is recommended—especially in 3.5L EcoBoost. Coils often fail sequentially, and labor cost is similar for one vs. all on EcoBoost engines.

How does towing affect P0302 in my F-150?

Towing increases cylinder pressure and heat, making misfire symptoms more pronounced. The PCM may enter limp mode to protect the engine when towing with active P0302.

Can bad gas cause P0302 in F-150 EcoBoost?

Yes—3.5L/2.7L EcoBoost engines are sensitive to fuel quality. Contaminated or low-octane fuel can cause misfires under boost. Use MA100's Fuel Quality Test to check.

10. Summary

P0302 (Cylinder 2 Misfire Detected) is a common issue in 2015-2024 Ford F-150 models, particularly affecting 3.5L EcoBoost and 5.0L V8 engines. Caused by ignition coil failure, spark plug wear, fuel injector issues, or carbon buildup, P0302 leads to reduced performance, decreased fuel economy, and potential catalytic converter damage if ignored.

The ICARZONE MA100 simplifies F-150-specific diagnosis with tools like cylinder balance tests, coil resistance checks, and Ford TSB lookup. Most P0302 cases are resolved with ignition coil or spark plug replacement—avoiding expensive dealer visits. By following preventive maintenance steps (e.g., earlier spark plug replacement and using Top Tier fuel), F-150 owners can maintain optimal engine performance and prevent P0302 issues.

Fix P0302 in Your Ford F-150 with ICARZONE MA100

MA100 includes F-150-specific misfire tests, coil diagnostics, and Ford TSB updates—perfect for 3.5L EcoBoost, 5.0L V8, and other popular engine options. Diagnose and repair your truck with professional-grade tools.

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