Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

Modern vehicles are pretty complicated pieces of tech. Apart from emissions and other vital functions, the engine control system relies heavily on several sensors to regulate performance. That is ...

Smarter fault detection: AI-assisted scanners and apps now analyze sensor data, run tests, and suggest targeted repairs instead of just listing codes. DIY tools expand: Bluetooth OBD2 adapters and ...

Your oxygen (O2) sensors are small but mighty — they help your engine run efficiently, cut emissions, and prevent costly damage. With the right OBD-II scanner and a bit of know-how, you can decode ...

The average age of all vehicles on the road is rising, as are their ensuing repair costs. Today’s cars, trucks and SUVs are loaded with technology, none the least of which is an onboard diagnostic ...

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 ...