Ignition Coil Primary Control Circuit High Voltage
The P2319 code indicates that the powertrain control module (PCM) has detected a voltage higher than expected in the primary control circuit of a specific ignition coil. This circuit controls the coil's ground path to fire the spark plug. A high voltage reading suggests a short to power, open circuit, or faulty coil driver within the PCM. This can cause misfires, reduced engine performance, and potential damage to the catalytic converter if left unresolved.
01. Most Common Causes
- Faulty ignition coil
- Short to voltage in the primary control circuit wiring
- Open circuit in the ignition coil primary wiring
- Failed PCM (internal driver)
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Reduced fuel economy
- Engine hesitation or lack of power
03. Step-by-Step Diagnosis
Step 1: Scan for codes and note which cylinder is affected.
Step 2: Visually inspect the ignition coil and wiring for damage, corrosion, or loose connections.
Step 3: Swap the suspect coil with another cylinder and see if the code follows.
Step 4: Test the primary circuit voltage at the coil connector with a multimeter (should be near battery voltage with key on).
Step 5: Check for continuity and shorts in the wiring between the PCM and coil connector.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the misfire can damage the catalytic converter and reduce engine performance.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on whether the coil, wiring, or PCM needs replacement.