How do I fix the code P0171 on my Honda?
How do I fix the code P0171 on my Honda? If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists, the front oxygen (O2) sensor may need to be replaced. What does p0171 and po174 mean? A continual low voltage reading indicates a lean fuel mixture, too much oxygen. The optimal ratio is 14.7:1 (air:fuel). When your powertrain/engine control module receives a reading that...