These 12 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 12 times.
| Code | Definition | Repair coverage |
|---|---|---|
| P0171 | System Too Lean Bank 1 | 3 ranked fixes |
| P0174 | System Too Lean Bank 2 | 3 ranked fixes |
| P2096 | Post Catalyst Fuel Trim System Too Lean Bank 1 | 3 ranked fixes |
| P2098 | Post Catalyst Fuel Trim System Too Lean Bank 2 | 3 ranked fixes |
| P2177 | System Too Lean Off Idle Bank 1 | 3 ranked fixes |
| P2179 | System Too Lean Off Idle Bank 2 | 3 ranked fixes |
| P2187 | System Too Lean at Idle Bank 1 | 3 ranked fixes |
| P2189 | System Too Lean at Idle Bank 2 | 3 ranked fixes |
| P2191 | System Too Lean at Higher Load Bank 1 | 3 ranked fixes |
| P2193 | System Too Lean at Higher Load Bank 2 | 3 ranked fixes |
| P2E68 | System Too Lean During Cylinder Deactivation Bank 1 | 3 ranked fixes |
| P2E6A | System Too Lean During Cylinder Deactivation Bank 2 | 3 ranked fixes |
This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:
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