P0358 - Ignition Coil H Primary/Secondary Circuit

The ECM detected a fault in ignition coil H primary or secondary circuit.

Code Overview

The ECM detected a fault in ignition coil H primary or secondary circuit.

Common Causes

• Failed ignition coil H
• Damaged wiring or connector at coil H
• Driver circuit fault

Diagnostic Steps

1. Inspect the coil H connector and wiring
2. Check coil power, ground, and trigger operation
3. Confirm the fault follows the coil before replacing parts

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.