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DTC P0140 HEATED OXYGEN SENSOR 2 (REAR) (PLAUSIBILITY); DTC Confirmation Procedure; Overall Function Check

EF & EC-7140prose procedure
Continued from EF & EC-7139
CG10, CGA3

DTC Confirmation Procedure

With CONSULT-II

  1. 1
    Start engine and warm it up to normal operating temperature. If 1st trip DTC is detected, go to "Diagnostic Procedure", EC-7142.
  2. 2
    Turn ignition switch "OFF" and wait at least 1 second.
  3. 3
    Let it idle for at least 3 minutes.
  4. 4
    If DTC is detected, go to "Diagnostic Procedure", EC-7142.

Overall Function Check

Use this procedure to check the overall function of the heated oxygen sensor 2 (rear) circuit. During this check, a 1st trip DTC might not be confirmed.

With GST

  1. 1
    Start engine and warm up engine to normal operating temperature.
  2. 2
    Stop engine and wait at least 1 second.
  3. 3
    Set voltmeter probes between ECM terminals 39 and ground.
  4. 4
    Restart engine and check the voltage when revving engine up to 4,000 rpm under no load at least 10 times. (Depress and release accelerator pedal as soon as possible.) The voltage should be below 0.56V at least once during this procedure.
  5. 5
    If NG, go to "Diagnostic Procedure", EC-7142.
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See also

EC-7142

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