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Powertrain

P1603

Code meaning and manufacturer information

OBD-II / DTC

Reference meaning

What does this code mean?

The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.

A code identifies a detected condition, not a part that must automatically be replaced.

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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Before replacing a part

Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.

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Manufacturer communications

10

Original wording in English

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24-01-018H ↗

HYUNDAI

Certain 2020-2021MY Accent (HC) vehicles may experience an illuminated warning light due to the following Diagnostic Trouble Codes (DTC) listed below: • TCU DTC Codes: P0730, P0731, P0741, P0867, P1603 Follow the procedure in TSB 24-01-018H (or latest version) to perform the TCU update, and, if necessary, replace the IVT (Intell…

24-01-014H ↗

HYUNDAI

Certain 2020-2021MY Accent (HC) vehicles may experience an illuminated warning light due to the following Diagnostic Trouble Codes (DTC) listed below: • TCU DTC Codes: P0730, P0731, P0741, P0867, P1603 Follow the procedure in TSB 24-01-018H (or latest version) to perform the TCU update, and, if necessary, replace the IVT (Intell…

23-01-019H ↗

HYUNDAI

Certain 2020-22MY Venue (QX) vehicles may experience a check engine light or malfunction indicator light due to Diagnostic Trouble Codes (DTC) listed below. Perform the TCU update, and, if necessary, replace the IVT (Intelligent Variable Transmission) to resolve this condition. • TCU DTC Codes: P0730, P0731, P0741, P0867, P1603

22-01-030H ↗

HYUNDAI

Certain 20MY Elantra (AD/ADa) vehicles may experience an illuminated check engine warning light due to Diagnostic Trouble Codes (DTC) listed below. Perform the Transmission Control Unit (TCU) update, and, if necessary, replace the IVT (Intelligent Variable Transmission) to resolve this condition. This update also includes the so…

Check vehicle applicability

51

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

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MakeModelModel year
HyundaiACCENT ↗2021
HyundaiACCENT ↗2020
HyundaiELANTRA ↗2020
HyundaiVENUE ↗2026
HyundaiVENUE ↗2021
HyundaiVENUE ↗2020
ScionIQ ↗2013
ScionIQ ↗2012

Code meaning and manufacturer information

Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.

EEPROM Malfunction

Can I keep driving?

A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.