Replaced O2 sensors cannot clear codes

2009 MAZDA 6
189,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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BARENNA12
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I replaced the O2 sensors, but cannot clear the error codes in the ECU. I tried 'clear codes' using a diagnostic tool and I tried disconnecting the battery and draining it. The codes remain in the ECU without starting the car up.
Nov 16, 2017 at 8:22 AM
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PATENTED_REPAIR_PRO
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If you cannot clear the codes, then most likely that means that replacing the O2 sensors did not fix the problem. Error codes do not always mean a sensor is bad, it just refers to the circuit, so it could be a problem with the circuit wiring.
Nov 16, 2017 at 2:06 PM
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STEVE W.
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What are the actual codes you have? What tool are you using to clear them?
Nov 16, 2017 at 2:18 PM
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