KNOWN FAULTS · Hyundai

Hyundai i20 (II) 1.0 T-GDi common problems.

2014–2020 · Petrol

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Applies if: Same type of direct-injection turbo engine (T-GDi).

Carbon on the injectors and intake of the T-GDi petrol enginesInjection / turbo

Engine / equipment: Hyundai and Kia 1.0 and 1.6 T-GDi direct-injection turbo petrol engines
Period mentioned: 2015 onwards
Symptoms: Loss of power, higher consumption, hesitation or rough idle, usually at high mileage.
Possible cause described: With direct injection, petrol does not wash the intake valves and carbon builds up on the injectors and intake. German guides mention it for the i20 III, Tucson IV and Picanto III (dirty injectors).
Check for the garage: Read misfire and fuel-trim codes; inspect the injectors and valves with a borescope; 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.

Applies if: Weak points of this model from inspections, breakdown statistics and recalls; anything specific to one engine is stated in the sheet.

Dual-clutch gearbox, carbon and electrics on the i20 IIKnown weak points

Engine / equipment: Hyundai i20 II (petrol and diesel)
Period mentioned: 2014–2020
Symptoms: The 1.2 feels sluggish pulling away; on the 1.0 T-GDI, carboned injectors and intake; with the 7-speed dual clutch, judder when pulling away and overheating warnings in traffic; a radio that freezes, bulbs that blow and the alternator.
Possible cause described: German and Polish used-car guides: a cheap car to run, mostly with minor faults; the 1.0 T-GDI direct injection encourages carbon build-up.
Check for the garage: Test the dual-clutch in traffic; check lights and alternator; clean the 1.0 T-GDI intake if it loses power.
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.

Applies if: Only with the 7-speed dual-clutch automatic (7DCT). Confirm the gearbox type.

Judder on the 7-speed dual-clutch gearbox (7DCT)Automatic gearbox

Engine / equipment: 7-speed dry dual-clutch automatic (7DCT)
Period mentioned: Approx. 2015–2021
Symptoms: Abnormal vibration or shudder when pulling away and at low speed, especially in traffic.
Possible cause described: Dual-clutch behaviour at low speed; Hyundai and Kia issued technical bulletins with new gearbox software (anti-judder logic) and, if that is not enough, a clutch replacement.
Check for the garage: At the dealer: run the judder test with the diagnostic tool, install the latest gearbox software and replace the dual clutch only if the judder remains.
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.