Ignition Coil Secondary Circuit Malfunction
The P2326 code indicates a problem in the secondary circuit of the ignition coil, which is responsible for generating the high voltage needed to create a spark in the spark plugs. This can be caused by a faulty ignition coil, damaged spark plug wires, worn spark plugs, or wiring issues. The engine may misfire, leading to reduced power, poor fuel economy, and increased emissions.
01. Most Common Causes
- Faulty ignition coil
- Damaged spark plug wires or boots
- Worn or fouled spark plugs
- Open or shorted wiring in the secondary circuit
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Reduced engine power and acceleration
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect ignition coil, spark plug wires, and spark plugs for visible damage.
Step 3: Test ignition coil primary and secondary resistance with a multimeter.
Step 4: Swap ignition coil with another cylinder to see if misfire follows.
Step 5: Check wiring and connectors for corrosion or damage.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause engine misfire, reduced performance, and potential damage to the catalytic converter.
How much does it cost to fix?▼
The cost to fix P2326 typically ranges from $50 to $150 for parts (ignition coil, spark plugs, wires) plus labor if done by a shop.