Banking Electricity Emissions Testing 
RepairSmith
JULY 17, 2024
Definition of OBD-II trouble code P0158: The P0158 code stands for “O2 Sensor Circuit High Voltage (Bank 2, Sensor 2).” ” It shows that the powertrain control module (PCM) detects a high voltage signal from the oxygen sensor located in Bank 2, Sensor 2. This is often called a “rich” condition.
RepairSmith
JANUARY 15, 2024
This warning light may even activate if your vehicle’s fuel pump has electrical issues, like damaged connections or a bad fuel pump relay. Failed Emissions Test A malfunctioning fuel pump delivering too much fuel could make the vehicle’s engine run rich, leading to a failed emissions test. Let’s find out.
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