P1315 Ignition Control - Cylinder No. 4 Circuit Malfunction

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: Camry, Corolla, RAV4, Tacoma

What does P1315 mean on a Toyota?

P1315 — Ignition Control - Cylinder No. 4 Circuit Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4, Tacoma.

Common causes of P1315

Failed cylinder 4 coil
Open ignition wiring to cylinder 4
Fouled plug
Corroded connector
ECM fault

How to fix P1315

Swap the cylinder 4 coil
Inspect the plug
Test circuit continuity
Check connectors
Replace the coil per findings