What does code P0174 mean on a Volvo and is it safe to drive?
P0174: System Too Lean (Bank 2). Here's what it means on your Volvo, 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 Volvo
- 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 Volvo, 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 Volvo
Volvo B6294T inline-six P0174 Bank 2 lean (rear cylinders 4–6) often comes from a cracked intake manifold boot or a failing MAF sensor. The B6294T's intake air temperature sensor can also give incorrect readings that affect fueling. Clean the MAF and inspect the air intake hose for cracks.
Most commonly affected models
XC90 B6294T 2003–2014S80 B6294T 2007–2012XC70 T6 2008–2014