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 ...

Trouble codes are never something car owners want to deal with. One that can cause some confusion is the P2195 code. In this guide, I look closer at what the P2195 trouble code means and what causes ...

Land Rover says some of its 2010-12 LR2 models may illuminate the Check Engine light and log O2 sensor trouble codes P2097 and P2099 in computer memory. If there are no drivability symptoms associated ...

The Check Engine Light has come on and you found a P0135 code with your compatible scanner. What’s next? After figuring out what this DTC means, you are ready to fix it. In this guide, we cover the ...

A closed loop control system for regulation of engine air-fuel ratio at the stoichiometric value is required for effective operation of a three-way catalytic converter. System performance depends ...

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 ...