OBD codes / P0301 / Chevrolet Equinox
P0301 on a Chevrolet Equinox
Cylinder 1 Misfire Detected
2.4L Ecotec four (LEA/LAF), 3.6L V6, and later turbo fours.
What P0301 usually means on a Equinox
P0301 isolates the misfire to cylinder 1. On the Equinox the usual causes are that cylinder's ignition coil or spark plug, but on the 2.4L Ecotec an oil-fouled plug from the engine's consumption is a distinctive and common reason a single cylinder misfires. The classic test is to swap the cylinder-1 coil to another cylinder and see if the misfire follows. Checking the plug for oil fouling is especially worthwhile on the 2.4 before assuming the coil is at fault.
Most likely causes on this model
- Failed coil or worn plug on cylinder 1
The everyday single-cylinder misfire cause. Swap the coil to confirm, and inspect the plug for wear or fouling.
- Oil-fouled plug on cylinder 1 (2.4L Ecotec)
The 2.4's oil consumption can foul cylinder 1's plug specifically, misfiring until the plug is cleaned or replaced and the consumption addressed.
- Injector fault on cylinder 1
A dirty or leaking injector skews fueling to cylinder 1 and causes a persistent misfire, more likely on the direct-injected turbo engines.
- Compression loss on cylinder 1
A leaking valve or worn rings produce a misfire ignition parts will not fix; on a 2.4 with heavy oil consumption, worn rings are a real possibility, so a compression test is worthwhile.
What it costs on a Equinox
A coil and plug for cylinder 1 is inexpensive, and on most Equinox engines that is the whole repair. On a 2.4 Ecotec, a fouled plug pointing to oil consumption means the real fix may be larger, and low compression from worn rings would be a major engine repair. Inspecting the plug and checking oil use first tells you which path you are on.
Fixing it
Swap the cylinder-1 coil and recheck. If the plug is oil-fouled on a 2.4, address the oil consumption too, and if compression is low, investigate the rings before spending on more ignition parts.
For the full step-by-step diagnosis order (any vehicle), see the main P0301 guide.
Year, engine and mileage change the answer. Get a diagnosis for your Equinox — it weighs these causes against your exact configuration and real complaint data.
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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.