P0175
Medium SeveritySystem Too Rich (Bank 2)
Fuel System
What Does P0175 Mean?
Bank 2 is running rich. If P0172 is also present, look for shared causes like fuel pressure or MAF sensor.
Common Fix
Replace leaking injector or fix fuel pressure
Estimated Cost (DIY)
$30 - $200
Symptoms
- ⚠️Black smoke
- ⚠️Poor fuel economy
- ⚠️Fuel smell
- ⚠️Rough running
Common Causes
How to Diagnose P0175
- 1Check fuel pressure
- 2Inspect injectors
- 3Check O2 sensor bank 2
- 4If P0172 also present, focus on shared components
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0175.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0175 on this vehicle.
Open the exact repair flow most commonly associated with P0175 on this vehicle.
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Exact Vehicle Hubs
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Related Codes
Bank 1 is running rich — too much fuel relative to air. The ECM cannot trim enough fuel out to compensate.
Same as P0171 but on bank 2. If both P0171 and P0174 are present, the issue is likely shared (MAF, fuel pump, or large vacuum leak).
Upstream O2 sensor bank 2 reads too high (rich).
Frequently Asked Questions
- Is P0175 the same fix as P0172?
- Same diagnostic approach but on bank 2. If both banks rich, focus on shared causes like fuel pressure regulator.
- How do I find a leaking injector?
- With the engine off, pressurize the fuel rail and watch for fuel dripping from injector tips. Or use a stethoscope to listen for clicking patterns.
Related Repair Guides
If your vehicle has triggered P0175, these DIY repair guides may help: