The Ignition Coil, also known as a Spark Coil, is a critical component of a vehicle’s ignition system. It functions as a transformer, converting the standard 12 volts supplied by the vehicle’s electrical system into the 25,000 to 30,000 volts (or higher) required to produce a spark at the spark plug.
This high-voltage spark ignites the air-fuel mixture within each cylinder, ensuring efficient combustion, smooth engine performance, and optimized power output. Without a properly functioning ignition coil, the engine may misfire, run roughly, or fail to start entirely.
How It Works:
- The ignition coil receives low-voltage current from the battery.
- Inside the coil, magnetic induction amplifies that current to a much higher voltage.
- This high-voltage current is delivered to the spark
- plug, igniting the air-fuel mixture.
- The process repeats thousands of times per minute, powering the engine’s combustion cycle.
Modern vehicles use various coil configurations such as coil-on-plug, pencil coils, or coil packs, depending on the manufacturer’s ignition design.
Product Features & Benefits from Walker Products:
- Exact OE Fit: Designed as a direct-fit replacement for fast and easy installation.
- OE Replacement Quality: Built to meet or exceed OEM specifications for performance and durability.
- High-Temperature Resistant: Advanced materials withstand extreme heat and vibration.
- Improved Combustion Efficiency: Ensures consistent, powerful spark output for smoother performance.
- Comprehensive Coverage: Fits a wide range of domestic and import vehicles from 1960 to current models.
- Reliable Performance: Reduces misfires, improves fuel economy, and restores engine smoothness.
Symptoms of a Failing Ignition Coil:
- Engine misfires or rough idle.
- Loss of power and poor acceleration.
- Hard starting or no-start conditions.
- Reduced fuel efficiency.
- Illuminated Check Engine Light (CEL).
Ignoring coil failure may lead to catalytic converter damage or emission system faults, so early diagnosis and replacement are recommended.
Common Check Engine Light (CEL) / OBD-II Codes
The following OBD-II codes are commonly associated with ignition coil circuit or performance issues. These may appear if a coil is malfunctioning, shorted, or failing under load:
- P0350 – Ignition Coil Primary/Secondary Circuit Malfunction
- P0351 – Ignition Coil “A” Primary/Secondary Circuit
- P0352 – Ignition Coil “B” Primary/Secondary Circuit
- P0353 – Ignition Coil “C” Primary/Secondary Circuit
- P0354 – Ignition Coil “D” Primary/Secondary Circuit
- P0355 – Ignition Coil “E” Primary/Secondary Circuit
- P0356 – Ignition Coil “F” Primary/Secondary Circuit
- P0357 – Ignition Coil “G” Primary/Secondary Circuit
- P0358 – Ignition Coil “H” Primary/Secondary Circuit
- P0360 – Ignition Coil “J” Primary/Secondary Circuit
- P0361 – Ignition Coil “K” Primary/Secondary Circuit
- P0362 – Ignition Coil “L” Primary/Secondary Circuit