p0174
Moderate
Infiniti · SUVs
System Too Rich (Bank 2)
Quick Answer
Error code P0174 on your Infiniti SUVs means: System Too Rich (Bank 2). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check oxygen sensor output voltage
2
Measure fuel pressure at fuel rail
3
Test mass airflow sensor
4
Inspect air intake for leaks
5
Replace oxygen sensor if needed
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
Fuel pressure gauge
Mass airflow sensor
Air intake hose
Related Error Codes