P1361 – Ignition Coil Secondary Circuit (Toyota)

Description

The ECM detected a malfunction in the ignition coil secondary circuit affecting spark output.

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Symptoms

Engine misfire
Rough idle
Poor acceleration
Hard starting
Check engine light

Causes

Faulty ignition coil
Secondary winding failure
Damaged wiring
Connector corrosion
ECM ignition driver fault

Diagnosis

Test ignition coil
Inspect wiring
Check connectors
Measure secondary resistance
Scan for related codes

Repair

Replace ignition coil
Repair wiring
Clean connectors
Replace ECM if needed