Question about 1998 Toyota Camry
Generic code too lean bank 1 vacuum leaks pcv fault exhaust leak ahead of o2 sensor blocked injector low fuel pressure faulty air flow sensor silicone poisioning on o2 sensor sorry thats all ive got good luck
Posted on Jun 07, 2010
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Posted on Jan 02, 2017
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PO171 OBD2 Code basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes.
his code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.
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