This code is oxygen sensor heater circuit range/performance(bank2,sensor1)
the ECM detects the heated oxygen sensor internal resistance is not in specs for 6 seconds code sets
disconnect O2 sensor,switch ignition on engine not running and measure the voltage with a multi meter between O2 sensor reference signal circuit and low reference signal circiut(vehicle side of wiring) should read 350-550mV
possibly O2 sensor broken(faulty) replace
801 views
Usually answered in minutes!
×