DTC P0134: O2 Sensor 1/1 Stays At Center: Description
WARNING: This page is about a different car, the 2000 Plymouth Breeze, 2000 Dodge Stratus, and 2000 Chrysler Cirrus. However, it is still accessible from the selected car via links, so may be relevant.
Circuit is monitored with engine running for more than 2 minutes and engine coolant temperature 170°F (77°C) or more. DTC is set when upstream O2 sensor 1/1 signal voltage is .35-.55 volts for 1.5 minutes. Possible causes for DTC to set are: O2 sensor 1/1 ground circuit open, O2 sensor 1/1 signal circuit open, intermittent wiring harness failure, defective O2 sensor 1/1 or defective Powertrain Control Module (PCM).