trouble code P0155 (heated oxygen sensor)
12-21-2003, 02:43 PM
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trouble code P0155 (heated oxygen sensor)
My car issued code P0155 today. Got it scanned at autozone...the morons couldnt even tell me what it meant exactly. It was something like oxygen sensor bank 2. Does this mean I have a bad sensor...or did one of my O2 sims go bad? Any ideas?
12-21-2003, 09:43 PM
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P0155 = Heated Oxygen Sensor (HO2S) heater circuit Bank 2 Sensor 1
That means the heating element in the pre-cat O2 sensor on the passenger side is not working. The sensor may be working, but the heating element isn't. Could be a problem with the wires that supply +12V to the heating element in the sensor, a bad pin on the harness connector, or a burned out heating element in the sensor. You could check the wiring harness with a volt meter to see if you get +12V across the black and brown wires in the harness connector. If you have the voltage there, the sensor is bad.
That means the heating element in the pre-cat O2 sensor on the passenger side is not working. The sensor may be working, but the heating element isn't. Could be a problem with the wires that supply +12V to the heating element in the sensor, a bad pin on the harness connector, or a burned out heating element in the sensor. You could check the wiring harness with a volt meter to see if you get +12V across the black and brown wires in the harness connector. If you have the voltage there, the sensor is bad.
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