P0353 indicates that the powertrain control module (PCM) has detected an open circuit in the primary control circuit of ignition coil C (typically cylinder 3). This prevents the coil from firing the spark plug, causing a misfire and triggering the check engine light.
The most common cause is an internal open circuit in the primary winding of ignition coil C, which prevents current flow when the PCM attempts to fire the coil.
An open or high-resistance connection in the power, ground, or control wire between the PCM and the coil can mimic a coil failure.
Loss of power to the coil due to a blown fuse or open fusible link will cause an open circuit condition.
A weak or corroded ground path can prevent the coil from completing the primary circuit, triggering the code.
In rare cases, the internal driver transistor in the PCM that controls coil C fails open, but this is far less common than coil or wiring issues.
It is not recommended. The misfire can cause unburned fuel to damage the catalytic converter, and the engine may run poorly or stall, creating a safety risk.
No, but it is the most common cause. Wiring issues, poor connections, or blown fuses are also frequent. The PCM itself is rarely at fault.
No. Only the faulty coil (or the one indicated by the code) needs replacement. However, if other coils are old or show signs of wear, some choose to replace them proactively, but it is not required.
No. Many drivers are told to replace the PCM for this code, but that is almost always incorrect. The PCM driver failure is rare; always check the coil, wiring, and fuses first.