- 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.
KNOWN FAULT · Kia
Dual-clutch gearbox not engaging second gear and 12 V lithium battery overcharging (Niro II hybrid)
Sources are not verified in real time and no entry confirms that your car is affected.
Has this happened to you?
Anonymous answer, no personal data.
Frequently asked questions
How much does it cost to repair this fault?
Free under warranty or the service campaign.
A rough figure from the original database, not an up-to-date quote.
Calculate estimateHow is it checked?
Read codes P074A73 and P1BB2 and ask Kia by VIN whether bulletin TRA106 and the battery update have been applied.
What are the 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.
Which cars and years does it affect?
- Brands
- Kia
- Engine / equipment
- Second-generation Kia Niro hybrid and plug-in hybrid with the 6-speed dual-clutch gearbox
- Period mentioned
- 2022–2023
Taking it to a garage?
Models with this entry
- Kia Niro (II)2022–2026
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