DTC P0138

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Circuit Description

Mini Mech

The rear heated oxygen (HO2S 2) sensor consists of a zirconia electrolyte between 2 platinum plates. When the reaches approximately 318°C (600°F) it becomes an electrical source that responds to the oxygen content in the exhaust. The powertrain control module (PCM) prod...

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Document Tags

Document Title: DTC P0138

circuit

rear

oxygen

sensor

approximately

exhaust

voltage

when

seconds

diagnostic