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Old 01-31-2023, 05:52 PM
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Marvin_Rall Marvin_Rall is offline
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Marvin_Rall Marvin_Rall is offline
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Join Date: Jan 2023
Location: 3678 Hillcrest Lane Anaheim, CA 92801
Posts: 8
Real Name: Marvin S. Rall
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Installing anti-fouler fixes to correct a P0420 code can have unintended consequences, such as the loss of low-end torque that you have experienced. The down-stream oxygen (O2) sensor can have an impact on fuel management and air/fuel ratios, which could contribute to the loss of power. It's possible that the O2 sensor is now spaced too far away due to the anti-fouler fix, which could be affecting its readings. I would recommend having a professional diagnose the issue and determine the best course of action to avoid any potential damage to your engine.

Last edited by Marvin_Rall; 02-13-2023 at 05:42 PM.
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