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Home >> Chevrolet >> 2001 >> Metro >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.3L >> Diagnostic Tests >> DTC P0135: Ho2S Performance - Sensor 1 >> Circuit Description

Circuit Description

Heated Oxygen Sensor (HO2S) heater reduces time required to enter closed loop operation, and allows accurate catalyst monitoring by maintaining a sufficiently high temperature.

When DTC sets, MIL will illuminate after 2 consecutive ignition cycles in which diagnostic runs with active fault. PCM will record operating conditions at time of failure and store information in FREEZE FRAME/FAILURE RECORDS data buffer.

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