P2316 indicates that the powertrain control module (PCM) has detected a voltage higher than expected on the primary control circuit of ignition coil F. This usually points to a short to battery voltage in the coil’s driver circuit or an internal fault within the coil itself, causing the PCM to see an abnormal high‑voltage condition.
An internal short inside the coil’s primary winding can cause the control circuit to see battery voltage instead of the low‑voltage driver signal, triggering the high‑voltage code.
Damaged insulation, chafed wires, or a connector that has contacted a power source can feed unwanted voltage onto the PCM’s control line for coil F.
Corrosion or a poor connection can create abnormal resistance or voltage spikes that the PCM interprets as a high‑voltage condition.
The transistor or driver inside the PCM that switches the coil’s primary circuit can fail and stick high, though this is far less common than coil or wiring issues.
Although rare, a fault in the fuse or power distribution module can feed abnormal voltage back into the control circuit, setting the code.
PCM replacement is rarely required for this code. The most common causes are a faulty ignition coil or a short in its control wiring. Only after those are ruled out should the PCM driver circuit be considered.
No. P2316 relates to the primary control circuit of the ignition coil, not the secondary side or spark plugs. Spark‑plug issues will set different misfire codes.
Driving with this code can lead to engine mis‑runs, loss of power, and possible stalling. It is advisable to diagnose and repair the issue promptly to avoid further damage or unsafe driving conditions.