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Getting P2A03 error code

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Old 03-23-2017, 03:46 PM
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Getting P2A03 error code


Sometimes Im getting P2A03 error code. I've read a lot of posts and the main cause is exhaust leak. Im planning to replace my gaskets soon. Also, planning to clean MAF sensor as well.
Can someone have a look at my sensors parameters below? Are they Okay?
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Old 04-01-2017, 01:35 PM
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I think it's a problem that the voltages are not the same for the #1 sensors on banks 1 & 2. Notice that the #2 sensor voltages are about the same. I suggest replacing the bank 2 sensor and following the self-learning process. Or maybe just try the self-learning process first to see if that helps.
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Old 04-01-2017, 07:07 PM
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Looks like it's running a little bit rich. Try unplugging the MAF (It will set a code) and see what the readings are. The car should run in a default state.

The first set are A/F sensors, so you can probably swap sides to see if the error code moves. The rear O2 sensors verify the A/F sensors are working correctly.

I used SeaFoam to find my exhaust leaks.
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Old 05-18-2017, 03:14 AM
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Thanks a lot for your help! I didn't try a self-learning process, but the error is not appearing now. Iet's see what will be further. Maybe it was just a glitch Checked O2 sensors using scanner and seems they are working as expected.
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