1 0f 2 P0171/ 2nd code says pending on a Toyota 2002 camry

Question

Code p0171 (bank 1 to lean) 1of 2, 2nd pending but no code displayed. Current miles 219000. 02 sensors and catalytic converter were replaced last time check engine came on between 100000 to 150000 miles

Answer 1

Hi there,

The lean code can be caused by a bad mass air flow sensor, intake manifold leak, exhaust leak, or low fuel pressure. It is possible as well that the O2 sensor is causing the issue even though it had been replaced a while back.