P030C

Ignition A Control Signal Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Misfires
Unstable engine operation
Power reduction
Increased fuel consumption

Causes

Ignition coil malfunction
Wiring harness damage
Short circuit in control circuit
ECU malfunction

How to Fix

Check the condition of the ignition coil
Inspect the wiring harness for damage
Check control circuit for short circuit
Test the ECU for faults

Related codes

P0301 P0302 P0303 P0304