We do not have a full sheet for this code yet, with its causes and checks. What you see here comes from the OBD2 code standard.
System
Engine and transmission (P)
Code type
Manufacturer-specific code: its exact meaning depends on the make.
What do I do now?
If the engine light flashes, the car loses a lot of power, overheats or the brakes fail, stop somewhere safe and call for assistance.
If the car drives normally, book a garage and show them this code: its exact meaning and the cause depend on each model.
Tell us what you notice: the diagnosis takes the code, your car and the symptoms into account.
Where is it on the car?
This code does not point to the engine, the brakes or the transmission: you will see the X-ray car with no area marked.
Related faults in the database
Dual-clutch gearbox not engaging second gear and 12 V lithium battery overcharging (Niro II hybrid)Gearbox
Engine / equipment
Second-generation Kia Niro hybrid and plug-in hybrid with the 6-speed dual-clutch gearbox
Period mentioned
2022–2023
Symptoms
Fault light and code P074A73 (second gear will not engage); on the hybrid, loss of power with “Check hybrid system, stop safely”, hybrid-system, service and charging warning lights and beeping for about ten seconds.
Possible cause described
Kia technical bulletin TRA106 (February 2023) for model-year 2023 Niro hybrids and plug-in hybrids built from 14/6/2022 to 12/12/2022: the clutch actuator and gearbox control unit earth bolts are tightened and the gearbox software is updated. In addition, service campaign SC335 (February 2025, superseding ELE318/SA553) updates the battery management software on Niro hybrids built from 21/6/2022 to 6/2/2023, because the 12 V lithium battery can overcharge (code P1BB2) and reduce power.
Check for the garage
Read codes P074A73 and P1BB2 and ask Kia by VIN whether bulletin TRA106 and the battery update have been applied.
Cost cited in the source
Free under warranty or the service campaign.A rough figure from the original database, not an up-to-date quote.