VW Golf GTI P0171: Meaning, Causes, Fixes and Driving Risks
P0171 means the engine computer has detected a lean fuel-trim condition on Bank 1—too much air relative to fuel, or not enough fuel for the measured air. On a VW Golf GTI, the code identifies a condition, not the part that caused it. An intake leak, inaccurate airflow measurement or a fuel-delivery problem are among… Read More: VW Golf GTI P0171: Meaning, Causes, Fixes and Driving Risks »