How to fix P0171 obd2 code
This code means a lean fuel mixture condition detected by too much presence of oxygen in your exhaust. This is monitored by your oxygen sensor mounted in your exhaust manifold. This is also similar to P0174 fault code. This fault code can be caused by dirty mass sensor wiring element contaminated by the presence of oil in your air filter. Cleaning the mass sensor element and replacing the air filter will fix this problem. If the fuel filter has not been changed for a while, now is the time to do it.
To verify this code, make sure you have the following symptoms before doing anything:
Hesitation, lack of power, detonation and sometimes surging. If after doing the repairs suggested above, the code remains, try these:
NOTE: It is understood that the engine has been checked for vacuum leak before doing these repairs. Also, check vacuum hoses for cracks and vacuum reading if possible. For assistance, contact ATS.
