p0174
Moderate
Cadillac · Sedans
System Too Lean (Bank 2)
Quick Answer
Error code P0174 on your Cadillac Sedans means: System Too Lean (Bank 2). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Scan vehicle with OBD2 to confirm code
2
Inspect vacuum hoses for leaks or damage
3
Check oxygen sensor condition on bank 2
4
Perform fuel pressure test
5
Verify intake system integrity
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
Vacuum hose
Fuel filter
Gasket sealant
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