Adaptive Fuel Diagnostic Trouble Codes Diagnostic Techniques: Notes
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DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC P0171/P0174 | System Too Lean Diagnostic Aids |
| DTC P0172/P0175 | System Too Rich Diagnostic Aids |
The Adaptive Fuel DTC Diagnostic Techniques help isolate the root cause of the adaptive fuel concern. Before proceeding, attempt to verify if any driveability concerns are present. These diagnostic aids are meant as a supplement to the Pinpoint Test. For a description of fuel trim, refer to FUEL TRIM .