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P0300

Ford Bronco GuideCritical Severity

P0300 on Ford Bronco: Symptoms, Causes & DIY Fix

Official technical diagnostic wire for fault code P0300 (P0300: Random or Multiple Cylinder Misfire Detected) specifically affecting Ford Bronco vehicles equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

DIY Parts Estimate

$100 - $600 (DIY: $30 - $120)

Bronco Direct Fit

Shop Labor Quote

$180 – $380

Based on $120/hr labor

Drivability Status

Not Drivable

Critical urgency level

Est. DIY Time

45 – 90 Min

Basic hand tools

Check P0300 On Another Ford Model:

Ford F-150 Ford F-250 Super Duty Ford Explorer Ford Mustang Ford Bronco Ford Ranger Ford Maverick

1. Symptoms of P0300 on Ford Bronco

When the Engine Control Module (ECM/PCM) on your Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP)) logs fault code P0300, drivers commonly observe:

Flashing Check Engine Light (CEL) on Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP))

Engine shaking, vibrating, or jerking at idle on Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP))

Noticeable loss of engine power when accelerating on Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP))

Strong gasoline smell from exhaust or poor fuel economy on Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP))

Stumbling or stalling at stoplights on Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP))

Ford Bronco OBD-II Port Location

The 16-pin diagnostic connector is located Beneath steering wheel lower shroud. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Ford Bronco

Historical warranty claims and technical repair bulletins for Ford Bronco point to the following failure distribution:

55%

Worn or fouled spark plugs and damaged spark plug wires (Ford OEM Part)

25%

Failing ignition coils or coil packs (Ford OEM Part)

12%

Clogged fuel injectors or low fuel rail pressure (Ford OEM Part)

Intake manifold vacuum leak (Ford OEM Part)

Low engine compression or faulty Camshaft/Crankshaft sensor (Ford OEM Part)

3. Step-by-Step DIY Repair Guide for Ford Bronco

Scan with OBD-II Scanner for Accompanying Codes

Plug a handheld OBD-II scanner into the 16-pin port under the dashboard. Check if specific cylinder codes like P0301 (Cylinder 1) or P0304 (Cylinder 4) accompany P0300. on the Ford Bronco equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

Required Tool: OBD-II Code Reader / Scanner

Inspect and Replace Spark Plugs

Remove the ignition coils, use a spark plug socket with ratchet to unthread spark plugs. Inspect electrode tips for carbon buildup, oil fouling, or burnt gaps. Replace with OEM iridium plugs gapped to spec. on the Ford Bronco equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

Required Tool: 5/8 Spark Plug Socket, Ratchet Extension, Gap Gauge

Test Ignition Coils

Perform an ignition swap test: Swap coil from a suspected misfiring cylinder to an adjacent cylinder. Clear codes and re-scan. If the misfire moves, replace the faulty coil. on the Ford Bronco equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

Required Tool: 10mm Socket, Multimeter

Check for Vacuum Leaks

Inspect PCV hoses, intake boot, and vacuum lines for cracking or hissing sounds while engine idles. Smoke test the intake if necessary. on the Ford Bronco equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

Required Tool: Carb cleaner spray or Smoke machine

Verify Fuel Delivery and Clear DTC Codes

Add a bottle of premium fuel injector cleaner (e.g. Chevron Techron). Clear the OBD-II codes with your scanner and take the car on a 15-minute drive cycle to confirm readiness monitors reset. on the Ford Bronco equipped with 2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP).

Required Tool: OBD-II Scanner

4. Ford Bronco P0300 FAQs

What causes code P0300 to trigger on a Ford Bronco?

On the Ford Bronco (2.3L EcoBoost (300HP) / 2.7L Twin-Turbo V6 (330HP) / 3.0L Raptor (418HP)), P0300 is most frequently caused by Worn or fouled spark plugs and damaged spark plug wires or Failing ignition coils or coil packs. Factory sensor degradation or wiring harness wear near the engine bay are common factors.

Can I safely drive my Ford Bronco with code P0300?

No. Driving with a flashing check engine light causes irreversible catalytic converter damage. Given that P0300 carries a Critical severity rating on Ford vehicles, we advise performing diagnostic scanning via the OBD-II port located beneath steering wheel lower shroud before extended highway driving.

Where is the diagnostic port located on the Ford Bronco?

The 16-pin OBD-II DLC connector on the Ford Bronco is situated beneath steering wheel lower shroud. It requires no special tools to plug in a standard scanner.

How much does it cost to fix P0300 on a Ford Bronco?

DIY replacement parts typically range between $100 - $600 (DIY: $30 - $120). If serviced at an authorized Ford dealership, expect an additional $120–$250 in professional labor based on their $120/hr hourly rate.