P038A

Ignition I Control Signal Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Misfires
Unstable idle
Reduced engine power
Difficulty starting the engine

Causes

Broken or damaged wiring harness
Ignition coil malfunction
Poor contact in connectors
Malfunction of the control module (ECU)

How to Fix

Check the integrity of the ignition control circuit
Inspect connectors and contacts for oxidation or damage
Test the ignition coil for functionality
Check the ignition control signal using an oscilloscope
Replace faulty components (coil, wiring, ECU if necessary)

Related codes

P0300 P0351 P0352