What does code P0174 mean on a Kia and is it safe to drive?
P0174: System Too Lean (Bank 2). Here's what it means on your Kia, 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 Kia
- 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 Kia, 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 Kia
Kia V6 P0174 on the 3.5L Delta platform typically points to a vacuum leak or dirty MAF sensor. The intake plenum gaskets on older Delta V6 engines can harden and leak, causing a lean condition on Bank 2. Clean the MAF first; if fuel trims don't improve, smoke test for vacuum leaks.
Most commonly affected models
Sorento V6 3.5L 2003–2009Sedona V6 3.5L 2002–2005Cadenza 3.3L 2014–2019