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p0174
Moderate
Maserati · Sedans & Sports Cars
System Too Lean (Bank 2)
Quick Answer
Error code P0174 on your Maserati Sedans & Sports Cars means: System Too Lean (Bank 2). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
2023-G2023-GC2023-GT2023-GRC2023-LVT2023-MC202023-MC20C2023-QP
Likely Causes
  1. Faulty oxygen sensor on bank 2
  2. Fuel pressure insufficient
  3. Vacuum leak on engine intake
  4. Mass air flow sensor malfunction
  5. Bad fuel pressure regulator
How to Fix It
1
Retrieve diagnostic codes with OBD-II scanner
2
Measure fuel pressure at fuel rail
3
Test oxygen sensors functionality
4
Perform smoke test for vacuum leaks
5
Replace fuel filter if necessary
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 filter
Vacuum hoses
Related Error Codes
P0171P0300P0420P0430P0455
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