I drive a 2004 Toyota Highlander. This PO138 code for oxy sensor 1 bank 2 came on a few weeks ago then turned off. It turned on again today after driving for a minute, it seemed to run ok but smelled pretty bad when I got out. Could driving with this code on or could I potentially damage my car?

  • funhousefrankenstein@alien.topBEnglish
    1·
    1 year ago

    Careful, don’t get caught in a wild goose chase: P0138 is Bank 1 (toward the firewall), Sensor 2 (Downstream sensor)

    Anyway, do you mean there’s a bad exhaust smell, or something like an electrical fire smell?

    If you have a basic OBD2 scan tool with a live-data feature, run the engine and check if your B1S2 voltages are higher than 1.2 volts for more than 10 seconds. If so, you’d proceed with an electric wiring/connector inspection & diagnosis.

    If the voltage response isn’t stuck above 1.0 volts, start the diagnosis by assuming a bad sensor (Bank 1 Sensor 2).