Understanding how oxygen sensors work will help you diagnose problems without having to rely completely on a repair shop. Oxygen sensors act as low-voltage producers, such as how a microphone uses ...

Hello. I've had an ongoing problem with my 2008 Corvette for over a year. I have reoccurring fault codes of P0171 and P0174, fuel trim lean on bank one and two. I have had the car to four shops and ...

Q:I have a 1996 Corvette that gave me a recurring fault code (P0171 - "System Too Lean, Bank One") for more than a year. The code reader on my scanner indicated that the fuel pump was defective, so I ...

Q: The “check engine” light on my 1999 Honda Civic lit up. The parts store’s code reader indicated the upstream oxygen sensor heater, but also suggested that wire connections be checked. When I ...

I have a 2007 Toyota RAV4 I bought from a large car dealer. After two months the “Check engine” light came on. The Toyota dealer said it was a defective oxygen sensor, which I had replaced. The next ...

Q: I have a 2007 Toyota RAV4 I bought from a large car dealer. After two months the "Check engine" light came on. The Toyota dealer said it was a defective oxygen sensor, which I had replaced. The ...