Q: In my vehicle, the check engine light comes on and then goes off and it is now back on. I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a ...
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Wideband O2 sensors and why tuners recommend them
Wideband O2 sensors play a pivotal role in the realm of automotive tuning, providing precise measurements of the air-fuel ...
I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a problem with the oxygen sensor. I replaced the oxygen sensor and the light never went out. I ...
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