Ignition Coil Secondary Circuit Malfunction
The P2335 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 plug. This can be caused by a faulty ignition coil, damaged spark plug wires, a worn spark plug, or a shorted or open circuit in the secondary wiring. The issue can lead to misfires, reduced engine performance, and increased emissions.
01. Most Common Causes
- Faulty ignition coil
- Damaged or worn spark plug wires
- Worn or fouled spark plug
- Shorted or open secondary circuit wiring
02. Symptoms You Will Notice
- Engine misfire
- Check Engine Light on
- Rough idle
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect ignition coil, wires, and spark plugs for damage.
Step 3: Test ignition coil primary and secondary resistance with a multimeter.
Step 4: Swap ignition coil with another cylinder and see if code moves.
Step 5: Check spark plug condition and gap; replace if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive for long distances as it can cause catalytic converter damage due to unburned fuel.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the specific cause and vehicle.