What does the Chinese generic fault code P0171:00 mean?

1 Answers
JohnAnn
07/29/25 8:01pm
The Chinese generic fault code P0171:00 indicates that the system (air-fuel ratio) is too lean. Below are the specific details about this fault code: 1. Possible causes: Air leak after the mass air flow (MAF) sensor, PCV system leak, faulty oxygen sensor, exhaust leak near the oxygen sensor, EGR leak, faulty MAF sensor, dirty fuel filter, insufficient fuel supply from the fuel pump, etc. 2. Solutions: Check the oxygen sensor; fuel regulation faults may lead to default operations such as harsh shifting, illumination of the ABS/traction control system indicator light, etc. Perform fuel system maintenance, run at high speed for a few kilometers, and finally replace the MAF sensor.
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