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02 sensor

  1. P0150 O2 Sensor Circuit Malfunction

    Care, Maintenance, and Troubleshooting
    I replaced this sensor and I still have the check engine light on and the same code. I replaced the top sensor on the driver side. I have a 2003 mrs. I would appreciate any help or suggestions. Also if I hook up the scan tool and clear the code I read close to the same voltage on all three...
  2. PPE Cat + Defouler + PPE Resistor = P0174 Lean Bank 2

    Care, Maintenance, and Troubleshooting
    I am pretty sure I have figured this one out, but thought I would get a second opinion as well as throw it up in the forums. After getting my PPE-Cat, I went out and bought a code reader, a few spark plug de-foulers, and got PPE to send me their inline resistor. Well, now that the ECU has...