The P1315 code in your 2020 Toyota Corolla indicates a malfunction in the fuel injector circuit for cylinder 2. This Toyota-specific code signals the ECU has detected an electrical problem with the cylinder 2 injector system.
Corolla Fuel Injection System
The 2020 Corolla's 2.0L Dynamic Force engine uses direct injection for maximum efficiency. Precise injector control is critical for the engine's combination of power and fuel economy.
Common Causes of P1315
- Cylinder 2 injector failure
- Wiring damage to injector
- Connector corrosion or damage
- ECU driver circuit failure
- Ground circuit problems
- High circuit resistance
Symptoms of Cylinder 2 Injector Issues
- Check engine light on
- Rough running engine
- Misfire on cylinder 2
- Poor acceleration
- Fuel smell in exhaust
- Reduced fuel efficiency
Direct Injection Advantages and Challenges
While direct injection provides excellent efficiency, the injectors operate in a harsh environment inside the combustion chamber. This can lead to deposit buildup and potential failures.