Why is the rear O2 sensor not active?
Normally this sensor will switch between high and low voltage at a noticeably slower rate than the front sensor. This is normal. If the signal received from rear (#2) O2 sensor indicates that the voltage has “stuck” between .425V to .474 V, the PCM determines this sensor is inactive and this code will set.
Where does the PCM use oxygen sensor 2?
The PCM uses the signal received from Oxygen sensor 2 (#2 indicates aft of catalytic converter, #1 indicates pre-converter) to read efficiency of TWC. Normally this sensor will switch between high and low voltage at a noticeably slower rate than the front sensor.
What should the bank 1 O2 sensor voltage be?
Using a scan tool, watch the Bank 1, sensor 2, o2 sensor voltage. Normally the voltage should switch slowly above and below .45 volts. If it does, the problem is likely intermittent. You’ll have to wait for the problem to surface before you can accurately diagnose.
How to check OBD-2 sensor circuit no activity?
Visually check the Bank1,2 harness connector for melting or chafing of the harness or the connector. Repair or replace as needed 3. Turn ignition on, but engine off. Disconnect the O2 sensor connector and check for 12Volts at the Heater Circuit supply and for proper ground on the heater circuit ground circuit.
Can a bad O2 sensor be removed without a socket?
Detect Bad O2Sensor. This is the first step in the process of removing your vehicle’s oxygen sensors without o2 sensor socket. Some vehicles come with more than one O2 sensor, so you need to detect which (if not all) of the O2 sensors have failed.
Where are the O2 sensors on my car?
If a vehicle being serviced is not covered in the charts, inspect the exhaust system in the general locations to find the applicable O2 sensors. NOTE: If equipped with dual exhaust systems, there may be up to 4 or 5 O2 sensors in the exhaust system.
How big is the nut on an O2 sensor?
What Size Socket Is An O2 Sensor. That’s easy; the nut on the O2 sensor is 22mm so the o2 sensor socket size is 22mm and can easily be removed using a 7/8 wrench. How Much Does It Cost To Fix Oxygen Sensor? What it costs to fix your vehicle’s oxygen sensor is mostly dependent on your car.
Is the O2 sensor on the Boxster a downstream sensor?
The friendly folks at Auto Zone diagnosed it as a O2 sensor. I don’t recall the code at the moment, will follow up with that later. At first he was not sure if it was an ‘upstream’ or ‘downstream’ sensor….further questioning led him to say ‘upstream’ but not real sure he got it right.