P2319 indicates that the powertrain control module (PCM) has detected a higher-than-expected voltage in the primary control circuit of ignition coil G. This typically points to a short-to-voltage condition, a faulty coil, or a wiring problem rather than a failed PCM.
Internal short in the coil's primary winding can cause excessive voltage draw, triggering the high-voltage code.
A chafed or melted wire in the coil harness contacting a 12V source can raise the primary circuit voltage above the expected level.
Corrosion, bent pins, or loose terminals can create intermittent high-resistance or short conditions that the PCM interprets as high voltage.
A failed ignition driver within the PCM can cause an incorrect voltage reading, but this is uncommon and should only be considered after thoroughly testing wiring and coils.
No, P2319 is a primary circuit voltage fault, not a secondary (spark plug) issue. However, a severely fouled or shorted spark plug can sometimes cause excessive current draw that indirectly damages the coil, but the code itself points to the coil or its wiring.
Almost never. The PCM is rarely the cause. Most cases are fixed by replacing the ignition coil or repairing a shorted wire. Only consider PCM replacement after thoroughly testing all other components and verifying the PCM output is faulty.
It means the PCM sees a voltage on the coil's primary control circuit that is higher than expected when the circuit should be off or at a lower level. This usually indicates a short to battery voltage or a failed coil driver.
It is not recommended. The misfire can cause catalytic converter damage and drivability issues. Have the problem diagnosed and repaired promptly.