P0301 on a Toyota Camry
P0301 means cylinder 1 Misfire Detected. On the Camry, a few causes come up far more than others.
What P0301 usually means on a Camry
P0301 pins the misfire to cylinder 1 on a Camry. Because it's cylinder-specific, the fix is usually simple — the coil, plug, or injector on that one hole. On the 2AZ-FE, oil fouling can affect any cylinder but often shows first where a plug is already weakest. A single-cylinder miss feels like a light shake at idle and can flash the light under hard acceleration.
Most common causes on the Camry
- Failed coil on cylinder 1
Swapping the No.1 Denso coil with a neighbor is the classic test; if the misfire moves, the coil is bad.
- Fouled or worn plug on cylinder 1
A single oil- or carbon-fouled plug will trip P0301 and is cheap to rule out.
- Injector issue on cylinder 1
A clogged or leaking injector starves or floods that one cylinder.
- Low compression on cylinder 1
A burned valve or worn ring on a high-mileage 2AZ-FE shows as a persistent single-cylinder miss.
What P0301 costs to fix on a Camry
A single coil and plug are inexpensive and quick on the four-cylinder, and cylinder 1 on the 2GR-FE V6 is on the accessible front bank. The bill only grows if a compression test comes back low — that's internal engine work rather than a bolt-on part.
Year, engine and mileage change the answer. Start a case and Redline weighs these causes against what your car shows, then names the check that would settle it.
Other codes on the Toyota Camry
Related symptoms
Toyota Camry problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0301 behavior is covered on the main P0301 page. Confirm with a scan tool before buying parts.
P0301 on your Camry?
Every problem becomes a Case. Tell Redline what your Camry is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.