Replaced both bank 1 & 2 heater o2 sensors with TDK brand, goes from low voltage when cold and to high voltage when warmed up and lean condition code, replaced a very greasy k&n filter and cleaned air flow tube up to throttle body opened flapper and cleaned out some greasy film from inside throttle body, could mass airflow be problem with these codes and if so how should I clean it or replace. Thanks for any help with this
How to clean maf sensor, trouble codes p0051 when cold, p0052 when warm, p0071 on 2002 Dodge Ram 1500
by bad911 in Ione, CA on March 29, 2012
ANSWER by csubak30 , March 29, 2012
Mass airflow could be issue but may not be only problem. Remove the sensor and clean with MAF cleaner (they sell it at parts stores) and reinstall. This sounds like it could be the ambient air sensor http://www.autozone.com/autozone/parts/2002-Dodge-RAM-1500-1-2-ton-2WD/Sensor-Ambient-Air-Temperature/_/N-jhazrZ9iz0h?filterByKeyWord=ambient+air+sensor&fromString=search Should be by front grille near the bottom. This can cause a p0071 code for rich/lean running condition.