rich-running fuel control concern
P0172 usually means the engine computer may be correcting for a mixture that appears richer than expected.
Article vehicle: 2015-2025 Ford F150 2.7 EcoBoost
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P0172: rich-running fuel control concern
Vehicle-specific published guides for this diagnostic trouble code.
P0172 Diagnostic Guide
P0172 may mean the PCM is seeing bank 1 as too rich and may be correcting fuel delivery in the lean direction as far as it can.
Article vehicle: 2015-2025 Ford F150 2.7 EcoBoost
Read diagnostic guide