The ECM detects an open or blown fuse on the ignition coil primary supply circuit A. Affected coils receive no operating voltage.
Medium severity. Can I keep driving?Drive as little as possible. If you feel jerking or the light flashes, stop: a misfire can damage the catalytic converter.
Most likely causes
- Primary supply fuse blown by short circuit
- Shorted ignition coil drawing excess current
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: easy
- It can trigger limp mode.
- It affects emissions.
What each character of P2C30 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- C: Subsystem depends on the code range
- 30: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2C30?
Drive as little as possible. If you feel jerking or the light flashes, stop: a misfire can damage the catalytic converter.
What causes code P2C30?
The most common causes are: primary supply fuse blown by short circuit; shorted ignition coil drawing excess current.
Related codes
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.