P0301 is better news than P0300, because your Escape has already done part of the diagnosis for you — it has named cylinder 1. On every Escape engine since 2013 the cylinders sit in a single inline row, and cylinder 1 is at the accessory-drive end of the block. What the code still does not say is which component in that cylinder failed: the plug, the coil, the injector, or the compression behind them. You can separate the first two for free in about fifteen minutes, and that is where this diagnosis should start on any engine.
Match the symptom
Select the closest observation. The result changes the first test; it does not name a part to replace.
Classic single-cylinder misfire. At idle nothing masks the missing contribution. Pull the freeze frame before touching anything — it records the conditions where the misfire actually happened.
Confirming the cylinder 1 repair held
Write down the freeze frame and the cylinder counters before clearing anything. Clearing first destroys the record of the conditions you need to reproduce in order to verify the repair.
Then drive the rpm, load and temperature window the freeze frame recorded and watch the cylinder 1 counter. Zero counts across those exact conditions is the proof. A dashboard that stays dark during a gentle drive is not, particularly for a fault that only appeared under load or when cold.
If the counter climbs again, save the new data rather than clearing and repeating. A misfire that returns under different conditions than before is telling you which system is actually failing, and that information disappears every time you reset the memory.
What can set P0301—and how to separate it
The order below is evidence-driven, not a universal probability ranking. Vehicle year, repair history, companion codes and the operating condition in freeze frame change where diagnosis should begin.
| Possible cause | Evidence that supports it | First useful test |
|---|---|---|
| Failing ignition coil on cylinder 1 | Misfire follows the coil when moved to another cylinder; carbon tracking in the boot; broken connector lock | Swap the cylinder 1 coil with a neighbour, clear the code and see whether the misfire moves with it |
| Worn or damaged spark plug | Cylinder 1 plug differs from the others — eroded electrode, cracked insulator, fouling or wrong gap | Remove it and compare directly against the other plugs and the specification for your engine |
| Injector fault on cylinder 1 | Misfire stays on cylinder 1 after plug and coil are eliminated; injector quiet or resistance out of line | Listen with a stethoscope, compare resistance, then run your scan tool's injector test |
| Vacuum leak affecting that runner | Positive fuel trims alongside the misfire; lean codes stored; hiss that changes on a smoke test | Smoke-test the intake rather than spraying flammable cleaner near a hot engine |
| Low compression on cylinder 1 | Misfire will not follow any component; relative compression down on that cylinder | Run relative compression from the scan tool, then a mechanical compression or leak-down test |
| Coolant intrusion (EcoBoost, specific years) | Coolant loss with no external leak, white smoke, sweet smell — most associated with cylinder 3 on the 1.6L but worth ruling out on any cylinder | Check coolant level and run a combustion-gas test before buying ignition parts |
The coil swap: fifteen minutes, no money
This is the highest-value test on the page and it costs nothing. Move the cylinder 1 coil to another cylinder and move that cylinder's coil into position 1. Label both so you do not lose track. Clear the code, then drive the conditions your freeze frame recorded.
If the code returns naming the cylinder that now holds the original coil, the coil is faulty and you have proved it without spending a penny. If it returns as P0301 again, the coil is fine — and you have eliminated the single most common cause for free. Either outcome moves the diagnosis forward, which is more than buying a part can claim.
Where cylinder 1 sits on each Escape engine
Every Escape engine from 2013 onward is an inline design — a three-cylinder on the 1.5L EcoBoost, a four-cylinder on everything else. There is only one bank, so cylinder numbering runs straight along the block from the accessory-drive end.
That makes cylinder 1 comparatively accessible on all of these engines, which is good news for the plug inspection and the coil swap. It is worth confirming the orientation for your specific engine before you start rather than assuming, particularly if you are used to working on a V-engine where the convention is different.
When a single-cylinder misfire is not an ignition problem
A misfire that refuses to move when you swap the coil and does not improve with a new plug is telling you something. At that point the fault is in fuel delivery to that cylinder or in the cylinder itself.
Injectors are the next check — listen to them, compare resistance across cylinders, and use the scan tool's injector test if it has one. After that, compression. Relative compression from a scan tool is quick and non-invasive and will show a low cylinder without removing anything.
On an EcoBoost Escape there is one further possibility that belongs on the list: coolant entering the cylinder. It is most associated with cylinder 3 on the 1.6L, but if your coolant is disappearing with no visible leak, run the combustion-gas test regardless of which cylinder the code names.
Why you should not replace all the coils
- P0301 has already narrowed the fault to one cylinder — that is the code doing you a favour
- Replacing every coil throws that advantage away and multiplies the bill
- It disturbs healthy connectors that were working perfectly
- If the real cause is an injector or compression, new coils change nothing
- The coil swap test costs nothing and answers the same question definitively
Save these scan-data clues
Freeze frame is a snapshot of conditions when the PCM matured the fault. It can distinguish an idle-only problem from a load, cold-start or monitor-completion problem. Clearing first throws that context away.
- Misfire counters for every cylinder, confirming cylinder 1 genuinely dominates rather than merely leading
- Engine coolant temperature, separating a cold-start fault from a warm one
- Short and long-term fuel trim; positive trims alongside misfire suggest air or fuel rather than ignition
- Engine load and rpm when the counters climbed
- Any companion codes — a lean code, a cooling code or a second misfire code changes the order of work
- Vehicle speed and throttle position at the time of the fault
A practical diagnostic workflow
- 01Check coolant level first on an EcoBoost
Five minutes, no cost, and on some Escape EcoBoost engines it is the difference between an ignition repair and an engine problem. Low coolant with no visible leak means run a combustion-gas test before anything else.
- 02Save the freeze frame and all cylinder counters
Confirm cylinder 1 really is dominating. If two cylinders are climbing together, you are looking at something broader than one failed part and the diagnosis changes.
- 03Pull the cylinder 1 plug and compare
Lay it beside the others. A plug that looks different has usually already answered the question, and its deposits tell you more — sooty for rich, wet for no ignition, oily for oil intrusion.
- 04Swap the coil, not your money
Move the cylinder 1 coil to a neighbouring cylinder, label both, clear the code and drive. If the misfire follows the coil you have found it; if it stays you have eliminated it. Either way you have spent nothing.
- 05Inspect the boot and connector while it is out
Carbon tracking looks like a thin black line down the insulator and lets spark escape to ground. A broken connector lock lets the coil work loose. Both are cheap and both get missed.
- 06Test the injector on that cylinder
With plug and coil eliminated, listen to the injector, compare its resistance with the others, and use the scan tool's injector test where available.
- 07Check compression when nothing moves the fault
A misfire that will not follow any component is mechanical. Relative compression from the scan tool first, then a mechanical compression or leak-down test if it looks low.
- 08Verify with counters rather than the dash
After the repair, drive the conditions the freeze frame recorded and confirm the cylinder 1 counter stays at zero. A dark dashboard at idle is not proof for a fault that appeared under load.
Do not replace every coil and plug because one cylinder misfired. P0301 already named the cylinder, and blanket replacement throws that away while multiplying the cost. Swap the coil first — fifteen minutes, no money, and it either finds the fault or rules out the most likely one. And on an EcoBoost Escape, check the coolant before you buy any ignition part at all.
P0301 repair cost comparison
These are planning ranges gathered from public U.S. estimate data, not quotations. Your figure moves with local labour rates, model year, engine and whether the shop bills diagnosis separately. Use them to judge whether a quote is reasonable — not to decide what is wrong.
| Repair | Parts only | Shop total | DIY difficulty | Notes |
|---|---|---|---|---|
| Coolant and combustion-gas check | Low — test fluid | Modest add-on | Easy with a kit | First step on any EcoBoost Escape with misfire |
| Coil swap diagnostic | $0 | Part of diagnosis | Easy — 15 minutes | Identifies or eliminates the most common cause at no cost |
| Single ignition coil | Moderate | Typically under an hour of labour | Easy | Replace the one you proved faulty, not the whole set |
| Spark plug (single or set) | Low per plug | Access is straightforward on inline engines | Easy to moderate | A full set is reasonable as maintenance, but it is not a diagnosis |
| Injector diagnosis and replacement | Higher on direct-injection engines | Get a quote | Advanced on EcoBoost | Only once plug and coil are eliminated by testing |
| Compression or leak-down testing | $0 | Standard diagnostic charge | Moderate with a gauge | Where the misfire refuses to follow any component |
Why the model year changes the test
Misfire on an Escape is not one problem with one answer. The naturally aspirated 2.5L behaves like a conventional engine and is usually cured by ignition or fuel parts. Certain EcoBoost engines have a documented coolant-intrusion history where misfire is the first visible symptom of something far more serious. Identify your engine and model year before you spend anything, because on some of these vehicles the correct first step is a cooling-system check rather than a coil.
- Every Escape engine from 2013 onward is inline, so cylinder 1 sits at the accessory-drive end of the block and there is no second bank. The 1.5L EcoBoost is a three-cylinder; the rest are four-cylinders.
- On the 1.5L three-cylinder, losing one cylinder costs a third of the engine's output rather than a quarter, which is why the symptom feels more severe on that engine.
- Certain 2013–2016 1.6L EcoBoost engines have a documented coolant-intrusion problem centred on cylinder 3. If your coolant is dropping, run a combustion-gas test regardless of which cylinder the code names.
- Spark plug specifications and service intervals differ between the naturally aspirated and turbocharged engines. Turbocharged engines are harder on plugs, so gap growth causes misfire sooner.
P0301 FAQ
Where is cylinder 1 on a Ford Escape?+
At the accessory-drive end of the block. Every Escape engine since 2013 is an inline three or four cylinder with a single bank, so the cylinders run in a straight line from there.
Can I drive with P0301?+
Briefly and gently if the light is steady. Stop if it is flashing. On an EcoBoost Escape, check the coolant level first — misfire with coolant loss is a reason not to drive at all.
Should I replace the coil or the plug first?+
Inspect the plug first because it costs nothing and often shows the fault. Then swap the coil to another cylinder. Between those two free steps you will identify most P0301 faults.
How much does it cost to fix P0301 on an Escape?+
Usually modest — a plug or a single coil. It becomes expensive only when the cause is an injector, low compression, or coolant intrusion, which is exactly why the free tests come first.
What if the misfire moves to another cylinder after the coil swap?+
Then the coil is faulty and you have proved it without spending anything. Replace that one coil rather than the set.
Why did P0301 come back after new plugs and coils?+
Because the fault was never in the ignition system. A misfire that survives both is usually an injector or a compression problem — and on an EcoBoost, possibly coolant entering the cylinder.
Is P0301 worse on the 1.5L three-cylinder?+
It feels worse. Losing one cylinder of three removes a third of the engine's output, so the roughness and power loss are more pronounced than on a four-cylinder.
Can a vacuum leak cause a single-cylinder misfire?+
Yes, if it feeds one intake runner or one injector seal. The tell is positive fuel trims alongside the misfire, and a smoke test finds it quickly.
Ford diagnostic references
These documents explain Ford monitor operation. Exact pinpoint tests, connector views and specifications must be selected for the truck's VIN and model year in current service information.
01Ford 2017 gasoline OBD operation summaryFord EVAP, misfire, fuel and comprehensive-component monitor descriptions↗02Ford 2024–2025 gasoline OBD operation summaryFord monitor logic, enabling conditions and drive-cycle requirements↗03P0300 on 2015–2022 Ford Escape: random misfire causes and fixesDocuments the EcoBoost coolant-intrusion pattern behind misfire on this platform↗04NHTSA technical service bulletin searchPublic database for confirming whether a bulletin covers your VIN and model year↗05Ford owner manuals and warranty guidesOfficial year- and VIN-specific manual lookup for your vehicle↗