OBD-II code P2361 indicates that the engine computer has detected that the combustion pressure in cylinder 11 is below the minimum acceptable threshold. This is monitored by an in-cylinder pressure sensor and usually points to a sensor issue, a lack of fuel or spark, or a mechanical failure within that specific cylinder.
The in-cylinder pressure sensor itself can degrade or fail internally, sending an inaccurately low pressure reading to the engine computer.
Corroded, frayed, or disconnected wiring and connectors to the cylinder 11 pressure sensor can cause a false low-pressure signal.
A clogged or electrically failed fuel injector on cylinder 11 will not deliver fuel, resulting in no combustion and therefore low cylinder pressure.
A failed ignition coil or fouled spark plug on cylinder 11 prevents combustion, causing a dramatic drop in cylinder pressure.
Severe issues like a burned exhaust valve, broken piston rings, or a head gasket leak specific to cylinder 11 will result in a genuine loss of compression.
No, replacing the PCM is almost never the correct fix for this code. Drivers are sometimes told to replace the PCM, but that is usually a misdiagnosis; the code is virtually always caused by a faulty sensor, a wiring issue, or a localized cylinder problem.
Cylinder 11 refers to the specific engine cylinder where the fault is detected. This numbering is based on the manufacturer's firing order and is typically found on larger V-configuration engines, such as V10s or V12s.
It is not recommended. The code indicates low combustion pressure, which usually causes a misfire that can damage the catalytic converter over time, or it may indicate a severe internal engine mechanical failure.
Engines that set this code are equipped with specialized in-cylinder pressure sensors that monitor combustion pressure in real time, allowing the computer to detect when the pressure drops below the expected threshold.