P0174
P0174 means "System Too Lean (Bank 2)". Severity: 🟡 Moderate. You can often drive short distances, but address it promptly to avoid further damage.
What the P0174 code means
| Code | P0174 |
| Definition | System Too Lean (Bank 2) |
| System | Powertrain (engine & transmission) |
| Type | Generic (SAE standard) |
| Subsystem | Fuel & Air Metering |
| Severity | 🟡 Moderate |
Common causes of P0174
- Vacuum leak
- Dirty MAF
- Weak fuel delivery
How to fix P0174
- Repair vacuum leaks
- Clean MAF
- Check fuel pressure
Always confirm the diagnosis with a scan tool and live data before replacing parts.
Is it safe to drive with P0174?
You can often drive short distances, but address it promptly to avoid further damage.
P0174, answered.
What does P0174 mean?
P0174 stands for "System Too Lean (Bank 2)". It is a generic (sae standard) OBD-II powertrain trouble code.
Is it safe to drive with a P0174 code?
You can often drive short distances, but address it promptly to avoid further damage.
What causes P0174?
Common causes include: Vacuum leak; Dirty MAF; Weak fuel delivery.
How do you fix P0174?
Typical fixes: Repair vacuum leaks; Clean MAF; Check fuel pressure. Always confirm the diagnosis before replacing parts.