P0358 — Ignition Coil H Primary Control Circuit/Open

P0358: Concerns the primary control circuit of ignition coil H, including an open-circuit condition.

Meaning, symptoms, causes and checks

Concerns the primary control circuit of ignition coil H, including an open-circuit condition. The letter H should remain a coil identifier until the vehicle's own mapping is known.

Affected system: Powertrain

Symptoms

  • Uneven running, misfires and reduced power.

Possible causes

  • Faulty coil, damaged wiring or poor contacts.

What to check

  • Identify coil H using service information and inspect wiring and connections.

Also written as: P0358-00, P035800, PO358 (some scan tools add the fault-type byte, e.g. -00).