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Acura DTC

Acura DTC P0158

Manufacture

Acura DTC

Code

P0158

Definition

Front Secondary HO2S (Bank 2, Sensor 2) Circuit High Voltage

Description

With the vehicle at operating temperature and driven between 1,000-3,000 rpm for at least 1 minute, the rear secondary HO2S output voltage is 1.270 V or more for at least 5 seconds. After current is applied to the rear secondary HO2S heater, if the rear secondary HO2S output continues to exceed the upper limit used during feedback control, a malfunction is detected and a DTC is stored. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.

Cause

  • Poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCMOpen circuit between the PCM and the secondary HO2S (Sensor 2)Faulty (Secondary HO2S (Bank 1, Sensor 2)Faulty PCM

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