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P015A

O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1

What this code means

Diagnostic trouble code P015A indicates: O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1. It was set by your vehicle's onboard diagnostics system and will typically keep the check engine light on until it's addressed.

ECUs that can switch off P015A

P015A is part of the Lambda / O2 OFF group. These ECUs support Lambda / O2 OFF, which switches it off:

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