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P0138-O2 SENSOR 1/2 CIRCUIT HIGH (CONTINUED) 2. (K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE Start the engine and allow the engine to idle. Disconnect the 1/2 O2 Sensor harness connector. Measure the voltage on the (K141) O2 Sensor 1/2 Signal circuit in the NOTE: Measure the voltage in reference to ground, not the (K904) Is the voltage above 0 volts? Yes >> Repair the short to battery voltage in the (K141) O2 Sen- sor 1/2 Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 3 3. (K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO BATTERY VOLTAGE Turn the ignition off. Disconnect the C2 PCM harness connector. Ignition on, engine not running. Measure the voltage on the (K904) O2 Return Downstream circuit in Is there any voltage present? Yes >> Repair the short to battery voltage in the (K904) O2 Return Downstream circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 4 9 - 182 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |