P0301 identifies physical cylinder 1 misfire but does not name a coil or injector. Confirm cylinder 1 on the exact 3.3L, 3.8L or 3.6L layout, inspect the labeled plug, perform one controlled ignition test, then test injector contribution and compression if the count stays. Bulletin 18-104-15 includes P0301 for a specified 2012 3.6L/DG2 software branch, while the X56 cylinder-head extension lists P0300 and even-cylinder codes—not P0301.
Match the symptom
Select the closest observation. The result changes the first test; it does not name a part to replace.
Stop loading.
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 |
|---|---|---|
| Cylinder 1 plug fouled/worn/cracked | Abnormal deposit/gap | Labelled plug |
| Ignition component/circuit | Controlled test follows | Targeted ignition test |
| Injector fault | Count stays/contribution differs | Balance/command |
| Compression/valvetrain | Low mechanical contribution | Compression/leak-down |
| Cam/crank timing fault | P0016/P0340/sync data | Correlation diagnosis |
Use the counter to control one swap
Label cylinder 1 components and record the misfire count under its original cold, idle or load condition. Move only a testable ignition component, then watch whether the count follows rather than replacing an entire set by assumption.
If the fault remains on cylinder 1, return the known-good component and evaluate the plug, injector command and flow, local intake leakage, compression and leak-down. Continued swapping destroys the control comparison.
Read the plug before discarding it
Compare plug 1 with another cylinder and keep both positions labeled. Raw-fuel wetness, heavy oil ash, unusual steam cleaning, a cracked insulator or excess gap each suggests a different next test.
A new plug may temporarily change how the engine runs without explaining why the old one fouled. Photographing the deposit preserves evidence for injector or mechanical diagnosis after reassembly.
Two bulletins have different code boundaries
Bulletin 18-104-15 includes P0301 among several diagnostic improvements for the specified 2012 RT 3.6L/DG2 combination. Verify build configuration and current PCM calibration before considering it.
The X56 bulletin instead names P0300, P0302, P0304 and P0306 and directs leakage testing of even cylinders. P0301 alone must not be converted into an automatic left-head replacement; mechanical testing must prove any cylinder fault.
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.
- Exact VIN, platform, model year and engine sales code
- All confirmed, pending and permanent companion codes
- RPM, load, coolant temperature and vehicle speed
- Relevant commanded and actual scan data
- Recent service, repairs and symptom conditions
- Manufacturer bulletin and current software/VIN status
A practical diagnostic workflow
- 01Identify engine and cylinder 1
Use exact diagram.
- 02Preserve condition
Capture cold/load counters.
- 03Inspect plug
Keep labeled.
- 04Test ignition once
Watch whether count moves.
- 05Test injector and sealing
If it stays.
- 06Check timing companions
Do not ignore correlation.
- 07Retest
Verify original conditions.
Do not replace the most commonly named component from P0301 alone. Confirm the exact engine, preserve evidence and complete the manufacturer test sequence before ordering parts.
Why the model year changes the test
Town & Country OBD-II coverage crosses several minivan generations, with 3.3L and 3.8L pushrod V6 engines in earlier vans and the 3.6L Pentastar in 2011–2016 RT models. Cylinder numbering, catalyst banks, oil-pressure hardware, cam signals and EVAP routing change with that engine boundary. Decode the VIN, identify the engine and verify build date before using a bulletin or parts catalog.
- Cylinder 1 location and ignition hardware differ between pushrod and Pentastar V6 engines.
- 18-104-15 includes P0301 only for its defined 2012 RT 3.6L/DG2 application.
- 09-002-14 Rev. B does not list P0301 as a qualifying X56 code.
- P0340/P0016 companions raise cam/crank synchronization priority.
P0301 FAQ
Is P0301 always a coil?+
No.
Can I drive?+
Not with flashing MIL or shaking.
Can I swap coils?+
Yes when engine hardware supports it.
What if it stays?+
Test injector and compression.
Can valves cause it?+
Yes.
Why check timing codes?+
They may explain the misfire.
Should I clear first?+
No.
What confirms repair?+
No cylinder 1 counts under original conditions.
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.
01Chrysler Bulletin 18-104-15 — 2012 RT 3.6L PCM updateApplies to 2012 Town & Country/Grand Caravan 3.6L with DG2 transmission and lists P0420, P0430 and P0300–P0306↗02Chrysler Bulletin 09-002-14 Rev. B — X56 cylinder-head extensionFor listed 2011–2013 3.6L vehicles, including LD Charger and RT Town & Country; applies to P0300/P0302/P0304/P0306 with leakage-test criteria↗03Stellantis/Mopar service informationFactory VIN-, platform-, engine-sales-code and calibration-specific service information↗04Mopar vehicle informationOfficial owner manuals and model-year warning, fluid, engine and operating information↗