Monitored & Set Conditions

DTC P0134 and P0140 are monitored with engine running for more than 121 seconds, coolant temperature more than 150.8°F (66°C) and engine in closed loop fuel control mode. On DTC P0140, vehicle speed must be more than 40 MPH. DTC will set when O2 sensor signal voltage is .35-.58 volt for 30 seconds, then 1.5 volts for 60 seconds. DTC P0134 is a one-trip fault, and DTC P0140 is a 2-trip fault. See TRIP INDICATOR  under ON-BOARD DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM.