P1300: Ion Current Combustion Control System
Short answer: P1300 means “Ion Current Combustion Control System”. Below is what it means on each of the 3 cars we cover, with a link to the full page for each car.
P1300 on each car
| Car | Meaning on this car | Confidence |
|---|---|---|
| Toyota Passo (1st gen) | Ion Current Combustion Control System (P1300/36) | high |
| Toyota Vitz (1st gen) | Igniter / ignition signal circuit (P1300/14) | medium |
| Toyota Corolla (9th gen, E120) | IGNITER CIRCUIT MALFUNCTION(NO.1) (P1300/14) | high |
| Toyota Corolla (9th gen, E120) | IGNITER CIRCUIT MALFUNCTION(NO.1) (P1300/14) | high |
| Toyota Corolla (9th gen, E120) | IGNITER CIRCUIT MALFUNCTION(NO.1) (P1300/14) | high |
Symptoms
- After the engine has been warmed up, when the signal from the ion current combustion control system is not inputted to the EFI ECU while the engine is running
- After the engine has been warmed up, when the signal from the ion current combustion control system is inputted continuously to the EFI ECU while the engine is running
- When the signal f
Likely causes
- Open wire or short circuit for ion system circuit
- Ignition coil
- Spark plug
- EFI ECU
What to check, in order
- Is the ignition system normal?
- Is the signal from the ion current combustion control system normal?
- Is the combustion system normal?
- Is the harness between the ignition coil and the EFI ECU normal?
- Is the ignition coil is normal?
- Is the EFI ECU normal?
Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.