p0174
Moderate
Cadillac · SUVs
System Too Lean (Bank 2)
Quick Answer
Error code P0174 on your Cadillac SUVs means: System Too Lean (Bank 2). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Use OBD2 scanner to verify code
2
Test fuel pressure at fuel rail
3
Inspect air intake for leaks
4
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
Diagnostic scanner
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