Ignition coils and carbon on the 1.2 turbo (8NR-FTS)

Engine / equipment

1.2 turbo petrol (8NR-FTS): Auris, C-HR and Corolla

Period mentioned

2015–2022

Symptoms

Poor acceleration and strong jerking, misfires and limp mode; at high mileage, loss of power and higher consumption from carbon on injectors, valves and intake.

Possible cause described

The coils fitted up to mid-2018 have a suspected manufacturing defect; Toyota usually replaces them as goodwill. Direct injection encourages carbon build-up.

Check for the garage

Read misfire codes and check the coil date; ask for a goodwill replacement; clean the intake if there are deposits.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database