P0351 Hyundai Elantra
Ignition Coil A Primary/Secondary Circuit Malfunction · Powertrain Code · High · Repair: Easy
What is P0351?
The ignition coil for cylinder 1 has an electrical fault.
When the Hyundai Elantra triggers code P0351 (ignition coil a primary/secondary circuit malfunction), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Hyundai Elantra.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Hyundai Elantra.
Common Causes on Hyundai Elantra
- Failed ignition coil on cylinder 1
- Ignition coil connector corrosion or poor connection
- ECM ignition driver circuit failure
- Wiring harness damage to coil 1 power or signal wire
Symptoms
- Check Engine Light on
- Misfire on cylinder 1
- Rough idle
- Loss of power
- Engine vibration
Notes for Hyundai Elantra
Hyundai ignition coils are coil-on-plug design; always inspect the spark plug boot for carbon tracking when replacing.