i please the engine is not running good and if you accelerate the engine is not accelerate and the code is p0171
po343 is camshaft sensor 1 bad and po171 is bank1 sensor bad, in English po343 cam sensor is mounted on back of engine and hard to get to, the po171 is bank 1 o2 sensor easy to replace.
System to lean (bank 1). There is a good chance you have a vacuum leak under the hood.
P0171, system too lean (bank 1). P0174, system too lean (bank 2). Start with checking for a vacuum leak.
The PO171 and PO181 codes refer to diagnostic trouble codes (DTCs) related to vehicle emissions and fuel system performance. Specifically, PO171 indicates a "System Too Lean (Bank 1)," meaning the engine is receiving too much air or not enough fuel, while PO181 relates to "Fuel Composition Sensor Range/Performance Problem," indicating issues with the fuel composition sensor's readings. Both codes can trigger the check engine light and may require further diagnosis to determine the underlying issues, such as vacuum leaks, fuel delivery problems, or sensor malfunctions.
leaking intake gaskets...
PO171 = system adaptive fuel too lean (bank 1) PO174 = system adaptive fuel too lean (bank 2)
system to lean bank one 02 sensor ?
po171--- system to lean (bank # 1)
P0171 System too Lean (Bank 1)
Fuel injection system, fuel trim to lean (bank 1)
Code P0171 means System to lean (bank 1)
Trouble code P0171 Means: System too lean (bank 1)