What does code P0174 mean on a Hyundai and is it safe to drive?
P0174: System Too Lean (Bank 2). Here's what it means on your Hyundai, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Same as P0171 but for bank 2. The engine is running too lean on the side that contains cylinder 2.
Common causes for your Hyundai
- Vacuum leaks affecting bank 2
- Faulty MAF or O2 sensor
- Fuel delivery issues
Symptoms
- Check Engine Light
- Rough idle, hesitation
- May appear with P0171 on V6/V8 engines
Typical fixes
- Smoke test for vacuum leaks
- Inspect intake gaskets and hoses
- Check fuel pressure and filter
Repair cost range
For a Hyundai, repairs for P0174 often fall between $100 and $600, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Hyundai
Hyundai V6 P0174 Bank 2 lean is often caused by a vacuum leak at the intake manifold gasket or a contaminated mass airflow sensor. On the 3.3L Lambda V6, the MAF sensor can pick up oil residue from the PCV system—clean the MAF before replacing it.
Most commonly affected models
Santa Fe V6 3.3L 2007–2012Azera 3.3L 2006–2011Tucson V6 2005–2009