Multiple codes p0101, p0141, p0140

[highlander44]

hi Guys. started out with just the p0101 code. Bought the mass air flow cleaner and cleaned sensor. now 3 codes are up! Help. could a faulty mass air flow sensor cause all of this?

 

[kschumake83]

0140 and 0141 are both for the passenger side, after the cat 02 sensor. I would look for vacuum leaks after the maf and then replace your rear o2 sensor. The ac delco sensors are inexpensive on amazon, less than you would pay for a pos Bosch one at a parts store.

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[highlander44]

P codes

Hi thanks for your reply, I tried some mass airflow sensor cleaner and the lights stayed off for a while then came back on. I ended up replacing my mass airflow sensor as well as both O2 sensors behind the catalytic converters. So for all is good. Thanks