P03FE

Ignition L Control Signal Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Misfires
Reduced engine power
Increased fuel consumption
Unstable idle
Check Engine light comes on

Causes

Ignition coil malfunction
Wiring harness damage
Poor connections or corroded contacts
Engine control module (ECU) malfunction
Open or shorted signal circuit

How to Fix

Check the condition of the ignition coil
Inspect the wiring harness for damage
Check connections and contacts for corrosion
Check the signal using an oscilloscope
Replace faulty components (coil, wiring harness, ECU)

Related codes

P0300 P0301 P0302 P0303 P0304