Code Definition

P1154 — Bank 2 Fuel Control Shifted Rich

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Generic

About P1154

P1154 is a manufacturer-specific powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1154 is stored, the module has detected a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1154 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This code is set when the powertrain control module (PCM) detects that the fuel control system for Bank 2 has shifted excessively rich and is unable to compensate within normal adaptive fuel trim limits. This may indicate excessive fuel delivery, restricted airflow, or oxygen sensor issues.

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