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Terms memorize DTC (code R0138)
After entering the system in a closed loop control, and after 3 minutes of the engine control unit for 0.5 to check the rear oxygen sensor signal. If two cycles of driving voltage signal rear oxygen sensor is greater than 1,058 V, the computer displays the code R0138 and lights warning light engine management system. The output of this code indicates an excessively high voltage signal rear oxygen sensor.
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