P0175
Medium SeveritySystem Too Rich (Bank 2)
Fuel System
P0175 — Instant Answer
System Too Rich (Bank 2)
Severity: MEDIUM SEVERITY
Meaning: Bank 2 is running rich. If P0172 is also present, look for shared causes like fuel pressure or MAF sensor.
Safe to drive? Usually yes with caution, but confirm root cause before long trips.
Estimated repair cost: $30 - $200
Most common causes:
- 1. Leaking fuel injector bank 2 (35-45% of cases)
- 2. Faulty O2 sensor bank 2 (10-25% of cases)
- 3. High fuel pressure (10-25% of cases)
- 4. Dirty MAF sensor (10-25% of cases)
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 Procedures for P0175
System Too Rich (Bank 2) Found 58 OEM service manual procedures.
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
11 51 000 Removing and installing/replacing the coolant pump (X5 M) - Replacement: Prepare the coolant pump
Showing 8 of 58 procedures
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0175.
OEM Manual Evidence
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Exact Repair Workflows
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Related Symptoms
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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.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07