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Home >> Chrysler >> 2006 >> Crossfire Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0123 To P0141 >> Diagnosis And Testing >> P0138 - O2 Sensor 1/2 Circuit High >> When Monitored and Set Condition
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When Monitored and Set Condition

  1. When Monitored: With the engine running between 1000 and 2000 RPM, engine load between 15% to 50%, closed loop mode, the three way catalytic converter temperature is greater than 380°C (716°F), and the O2 sensor heater must be ON for at least 220 seconds to enable the signal inactive portion of the test.
  2. Set Condition: O2 Sensor voltage is greater than 1.5 volts for approximately 5 seconds.
Possible CauseS 
O2 SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
ENGINE EXHAUST LEAK
O2 SENSOR
POWERTRAIN CONTROL MODULE

For a complete Powertrain Control Module Circuit Diagram, (Refer to ENGINE - SCHEMATICS AND DIAGRAMS) .

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