Nissan Micra K11 silhouetteK11

DTC P0133 HEATED OXYGEN SENSOR 1 (FRONT) (RESPONSE MONITORING); Diagnostic Procedure

EF & EC-7118prose procedure
Continued from EF & EC-7117
CG10, CGA3

Diagnostic Procedure

Step 1 — INSPECTION START

  1. 1
    Turn ignition switch "OFF".
  2. 2
    Loosen and retighten engine ground screws. (See NEF147A)
  3. 3
    Disconnect heated oxygen sensor 1 (front) harness connector. (See NEF153A)
  4. 4
    → GO TO 2.

Step 2 — CHECK INPUT SIGNAL CIRCUIT

  1. 1
    Disconnect ECM harness connector.
  2. 2
    Check harness continuity between ECM terminal 12 and heated oxygen sensor 1 (front) harness connector terminal 1. Refer to wiring diagram. Continuity should exist.
  3. 3
    Check harness continuity between ECM terminal 12 (or terminal 1) and ground. Continuity should not exist.
  4. 4
    Also check harness for short to power.
  5. 5
    OK or NG: - OK → GO TO 3. - NG → Repair open circuit or short to ground or short to power in harness or connectors.

Step 3 — CHECK HEATED OXYGEN SENSOR 1 (FRONT)

  1. 1
    Refer to "Component Inspection", EC-7119.
  2. 2
    OK or NG: - OK → GO TO 4. - NG → Replace heated oxygen sensor 1 (front).

Step 4 — CHECK INTERMITTENT INCIDENT

  1. 1
    Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
  2. 2
    → INSPECTION END.
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See also

EC-7119 · EC-7070

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