P0412 and P0140
04-11-2006, 10:44 PM
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P0412 and P0140 I scanned my car with OBD2 and got these codes:
P0412 - Secondary Air Injection Valve A Circuit
P0140 - O2 Circuit - No Activity Detected (Bank 1, Sensor 2)
Which O2 sensor is bank 1 ,sensor 2? What about the secondary air injection valve A circuit? Any info? Help would be appreciated!
P0412 - Secondary Air Injection Valve A Circuit
P0140 - O2 Circuit - No Activity Detected (Bank 1, Sensor 2)
Which O2 sensor is bank 1 ,sensor 2? What about the secondary air injection valve A circuit? Any info? Help would be appreciated!
04-12-2006, 09:55 PM
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Check for leaks and it sounds like you might have a bad O2. One way to do it is if you know somebody with HPTuner you could check the voltage coming from the sensor. If it's not producing any voltage it could be shorted to ground somewhere. It's a possibility the wire insulator was burn't through by the exhaust. The connector could have come unplugged... too many variables. You won't have voltage without the car running by the way. An O2 sensor uses a metal that reacts to air. If air isn't present it won't create voltage.
