Air intakeGeneric OBD-II codeUrgency: Monitor

P0507 on Hyundai: causes and affected engines

P0507 means: idle control system: speed higher than expected.^[1][2] Hyundai has 6 documented faults that can trigger it, across 6 engines, including 1.0 T-GDI, 1.6 GDI / T-GDI, 1.1 and 1.4 CRDi and 2.0 / 2.4 GDI and T-GDI (Theta II). Only a diagnosis can confirm the cause on your car.

Documented faults

that can trigger it

Engines

used by Hyundai, with at least one of them

Hyundai models

with at least one of these faults

Urgency

Monitor

Reviewed on 29 October 20263 sources How we work

Documented faults in Hyundai engines that can trigger P0507

Grouped by engine or model, from most to least important. These are faults with carbon build-up in the intake and with the intake flaps: not all of them will necessarily set the code, and only a diagnosis confirms the cause on your car.

1.0 T-GDI

In Bayon, i20 II, i20 III, i30 III, Kona I and Kona II

- Medium severityFrequency: CommonIntakeCarbon build-up on the intake valves and coking of the injectorsThe direct injection on the 1.0 T-GDI does not wash the intake valves with fuel, so over the kilometres carbon builds up on them and on the injectors. It causes loss of power, jerking and higher fuel consumption; it is fixed by cleaning the manifold and valves, without damaging the engine.

1.6 GDI / T-GDI

In i20 III, i30 II, i30 III, ix35, Kona I, Tucson III and 2 more models

- Medium severityFrequency: CommonIntakeCarbon build-up on the intake valvesBeing pure direct injection, with no port injectors to wash the valves, the 1.6 GDI and T-GDI build up intake carbon with mileage: unstable idle, jerking or loss of power. A design trait of all direct injection, not a manufacturing fault.

1.1 and 1.4 CRDi

In i20 I, i20 II, i30 II and ix20

- Medium severityFrequency: OccasionalInjectionCarbon build-up on the common-rail injectorsThe common-rail injectors on the 1.1 and 1.4 CRDi accumulate carbon deposits with urban use and short trips, which can make cold starting harder and cause jerking; German buying guides cite it as typical wear, not as a design fault specific to the engine.

2.0 / 2.4 GDI and T-GDI (Theta II)

In i30 III, Kona I and Santa Fe III

- Medium severityFrequency: OccasionalIntakeCarbon build-up on the intake valves of direct-injection Theta II enginesAs with any direct injection, petrol does not wash over the intake valves and deposits build up. A German guide to the Sorento XM 2.4 GDI associates them with loss of power and higher consumption and recommends using cleaning additives regularly.

2.0 CRDi (D4EA)

In Elantra I, Santa Fe I, Santa Fe II, Trajet and Tucson I

- Medium severityFrequency: OccasionalInjectionCarbon build-up in the common-rail injectors with town drivingThe common-rail injectors of the 2.0 CRDi D4EA can build up carbon with town driving and short journeys, making cold starting harder; it is documented for the Hyundai Tucson I and it is reasonable to expect it in the other cars with this engine.

Smartstream 1.6 T-GDi

In Kona I, Kona II and Tucson IV

- Low severityFrequency: RareIntakeCarbon build-up on the intake valves due to direct injectionBecause the petrol is injected directly into the cylinder, nothing cleans the intake valves and they can accumulate carbon over the miles. It is a general characteristic of direct injection; we have found no data specific to the 1.6 T-GDi Smartstream.

Common causes of P0507 on any make

From most to least likely, according to the sources.

1Vacuum leak or unmetered air entering after the throttle: cracked intake hose, PCV or brake servo hose, or manifold gasket.^[1][3]
2Throttle body dirty or sticking from carbon build-up, or idle air control (IAC) valve stuck open.^[1][2][3]
3Dirty mass airflow (MAF) sensor or incorrect coolant temperature signal.^[2][3]
4EVAP purge valve stuck open, letting vapours into the intake.^[1]

What to check first

The first diagnostic steps, from the most likely and cheapest to check to the most expensive.

1Use the diagnostic tool to check that the idle really is higher than the target and when it happens: cold, warm or with the air conditioning on.^[1]
2Look for unmetered air leaks with a smoke test on the intake: hoses, PCV, brake servo, gaskets and EGR.^[1][3]
3Clean the throttle body and the IAC valve, and carry out the throttle relearn with the tool if it is electronic.^[1][3]

Full guide to P0507: symptoms, diagnosis and whether you can drive

Frequently asked questions

Which Hyundai engines have faults that can trigger P0507?

1.0 T-GDI (1 fault), 1.6 GDI / T-GDI (1 fault), 1.1 and 1.4 CRDi (1 fault), 2.0 / 2.4 GDI and T-GDI (Theta II) (1 fault), 2.0 CRDi (D4EA) (1 fault) and Smartstream 1.6 T-GDi (1 fault). Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

What does code P0507 mean on a Hyundai?

Idle control system: speed higher than expected. The ECU has detected that the actual idle speed is consistently above the target it calculated itself, with a tolerance that AutoDTCs puts at around 200 rpm. It is a generic OBD-II code: it means the same on a Hyundai as on any other make.^[1][2]

Can I keep driving with P0507?

Monitor. According to the sources it will not leave you stranded, but a high idle raises consumption and can punish the automatic gearbox when engaging; get it repaired soon.^[1][3]

Sources

Every fact on this page links to its source. If you find an error, let us know.

P0507 – AutoDTCsAutoDTCs · Technical documentation · consulted 29 October 2026
OBD Fehlercode P0507CarWiki.de · Technical documentation · consulted 29 October 2026 · in German
P0507: OBD2 diagnostic trouble codeCarista · Technical documentation · consulted 29 October 2026