Toyota Corolla Won't Start: Common Causes and Checks (Australia)

The Corolla has a reputation for being bulletproof, and it mostly is. But even a Corolla needs a healthy battery, fuel and a working starter to get going. Most Corollas on Australian roads are either the previous model (2013 to 2018) with a 1.8-litre petrol, or the current model (2018 on) with a 2.0-litre petrol or the 1.8-litre hybrid. The checks differ a little between petrol and hybrid, so we cover both.

If you'd like a ranked list of likely causes for your exact Corolla and symptoms, the DIY Mechanic app can work through it with you. The checks below are a good place to start.

Why won't my Corolla start?

Start with what actually happens when you try. Nothing at all, or rapid clicking, usually means an electrical problem. Cranking at normal speed without firing points more to fuel or ignition. On a hybrid, there's no cranking at all, so the clue is whether the READY light comes on.

• Flat or ageing battery: the most common cause by far, especially after the car has sat for a while or done only short trips.
• Key or key fob: a flat fob battery, a damaged key, or a security light flashing on the dash can stop the car being allowed to start.
• Push-button start not detecting the brake: you need your foot firmly on the brake for the button to start the car.
• Starter motor or connections: a single click with bright dash lights often points here, or to a loose or corroded battery terminal.
• Fuel supply: running out, a faulty fuel pump or a fuel pump relay can stop a petrol Corolla firing.
• Gear selector: an automatic must be in P (or N on some) before it will start.

My Corolla clicks but won't start. What does that mean?

Fast clicking with dim lights is the classic sign of a battery that's too weak to turn the starter. Try a jump start or booster pack. A single loud click with bright lights is different: the battery is probably fine, and the starter motor, its solenoid or the main cable is more likely. Check that both battery terminals are tight and clean before assuming the worst.

My Corolla Hybrid won't go into READY. What should I check?

• Foot firmly on the brake, then press the start button. The green READY light should appear on the dash.
• If nothing happens, or the dash just flickers, the small 12V battery is the most likely problem. The big hybrid battery doesn't wake the car up on its own.
• If you see a key not detected message, hold the key fob right up against the start button and try again. This works even with a flat fob battery on most Toyotas.
• If a hybrid system warning appears, that's a different fault. Our Toyota hybrid warning guide explains what to do.
• Your owner's manual shows the correct jump-start points for your model. Use those rather than guessing.

Corolla no-start symptoms and what they usually point to

Is it safe to jump start a Corolla?

Yes, following the steps in the owner's manual. Connect positive to positive, then the negative lead to a bare metal earth point away from the battery, not to the flat battery's negative terminal. On a hybrid, use the jump points the manual specifies. If the car starts but the battery is flat again a few days later, the battery or charging system needs testing, not another jump.

When should I call a mechanic?

Get help if the battery tests fine but it still won't start, if it cranks but never fires, if there's a strong fuel smell, or if a security or hybrid warning stays on. A workshop can test the battery and starter properly, read any stored fault codes and check fuel pressure, which saves you replacing parts that aren't faulty.

To narrow down the most likely cause for your Corolla before you book it in, start a free diagnosis preview below.