2001 Oldsmobile Aurora 4.0L with engine code P0140

Question

I replaced several parts and i'm still receiving the p0140 code. I replaced both air diverter valves, secondary air injection pump, and the bank 1 rear oxygen sensor (upstream rear). I was just wondering if anybody has any other suggestions because i would like to fix the actual problem instead of buying parts which are not seeming to fix the problem.

Answer 1

HI there

Some things to check for with this code would be fuel pressure and the catalytic converter. The wiring for the sensor could be bad as well. Here is some more info for you.

P0140 OLDSMOBILE - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2
Read more: https://www.autocodes.com/p0140_oldsmobile.html