P0301 on Lincoln
Cylinder 1 Misfire Detected
P0301 on Lincoln vehicles indicates cylinder 1 misfire detected. Au7o has documented this code across 2 Lincoln models — most commonly on MKX, Navigator. P0301 means the engine computer detected a misfire specifically in cylinder 1 — the spark didn't ignite the fuel properly, or the fuel/air mix didn't burn as it should. The computer detects this by sensing tiny variations in crankshaft speed each time a cylinder fires. A misfire wastes fuel, raises emissions, and can damage the catalytic converter if it's severe or persistent (a flashing check engine light usually warns of active, converter-damaging misfires). Because the code points to one specific cylinder, the cause is usually an ignition, fuel, or compression problem isolated to that cylinder. Typical repair costs on Lincoln range from $300 to $8,000, depending on the specific model and root cause.
Common Causes of P0301
- •Worn or fouled spark plug in cylinder 1
- •Failed ignition coil or coil pack for cylinder 1
- •Faulty or clogged fuel injector for cylinder 1
- •Vacuum or intake air leak affecting that cylinder
- •Bad spark plug wire (on applicable engines)
- •Low compression (worn rings, leaking or burnt valve, head gasket)
- •Carbon buildup on intake valves
- •Wiring or connector fault to the coil or injector
P0301 on Lincoln by Model
Lincoln MKX(1 issue)
- 2.7L EcoBoost Excessive Oil Consumption from Faulty Valve Guides2016-2017
2016-2017 Lincoln MKX models with the 2.7L EcoBoost V6 (engines built roughly April 2016 to January 2017) can suffer excessive oil consumption caused by defective cylinder head valve guides that let oil seep into the combustion chamber and burn off. Owners report burning roughly a quart every 3,000 miles, often accompanied by rough idle, misfires, and blue/white exhaust smoke. Ford addressed this in Technical Service Bulletin 19-2243, whose official remedy is replacement of both left and right cylinder heads. Fouled spark plugs from oil contamination commonly trigger cylinder-specific misfire codes.
Lincoln Navigator(2 issues)
- Navigator 5.4L 3V Triton Spark Plug Breakage on Removal2005-2008
The 5.4L 3-valve Triton V8 in 2005-2008 Navigator (and shared F-150/Expedition) uses a two-piece spark plug (Motorcraft SP-515/SP-546) that frequently snaps off in the cylinder head during removal. The lower portion stays welded into the head by carbon, leaving the upper electrode in the socket. Common at 60,000-100,000 miles when the first plug change is attempted.
- 5.4L 3-Valve Triton Spark Plugs Seize and Break in Cylinder Head2005-2008
Second- and third-generation Navigators with the 5.4L 3-valve Triton V8 use a unique two-piece spark plug whose long electrode shell extends below the threads. Carbon deposits cake into the gap over high mileage, gripping the plug so tightly that the shell breaks off during removal, leaving a portion seized inside the aluminum cylinder head. This turns a routine tune-up into a costly extraction job.
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View P0301 across all makes →Frequently Asked Questions
What does P0301 mean on Lincoln?▼
P0301 stands for "Cylinder 1 Misfire Detected." P0301 means the engine computer detected a misfire specifically in cylinder 1 — the spark didn't ignite the fuel properly, or the fuel/air mix didn't burn as it should. The computer detects this by sensing tiny variations in crankshaft speed each time a cylinder fires. A misfire wastes fuel, raises emissions, and can damage the catalytic converter if it's severe or persistent (a flashing check engine light usually warns of active, converter-damaging misfires). Because the code points to one specific cylinder, the cause is usually an ignition, fuel, or compression problem isolated to that cylinder. On Lincoln specifically, this code is documented across 2 models.
What causes P0301 on Lincoln vehicles?▼
Common causes on Lincoln: Worn or fouled spark plug in cylinder 1, Failed ignition coil or coil pack for cylinder 1, Faulty or clogged fuel injector for cylinder 1, Vacuum or intake air leak affecting that cylinder, Bad spark plug wire (on applicable engines). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0301 on a Lincoln?▼
Repair costs on Lincoln range from $300 to $8,000, depending on the specific model and root cause.
Which Lincoln models have P0301 documented?▼
Au7o has documented P0301 on 2 Lincoln models: MKX, Navigator.