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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0136 & DTC P0156 >> Circuit Description
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Circuit Description

Heated oxygen sensor monitors exhaust gas oxygen content and delivers an input signal to ECM. ECM uses input signal to determine fuel injection system operation. DTC is set when oxygen sensor remains at .35 volt or more, or .55 volt or less during vehicle operation once engine is at normal operating temperature. Possible causes are:

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