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Home >> Suzuki >> 2001 >> Swift GL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0134: Heated Oxygen Sensor No. 1 Circuit No Activity Detected >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST . If DTC P0134 is set, go to next step. If DTC P0134 is not set, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  2. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any DTC other than P0171, P0172 or P0134 are set, repair those DTCs first. If no other DTCs are set, go to next step.
  3. Connect scan tool. Start engine and allow it to reach normal operating temperature. Increase engine speed to 2000 RPM for at least one minute. Allow engine to return to idle. Rapidly increase engine speed 5-6 times repeatedly while monitoring HO2S No. 1 parameter on scan tool. If parameter reading does not vary from less than 0.3 volt to more than 0.6 volt, go to next step. If parameter reading varies from less than 0.3 volt to more than 0.6 volt, check fuel system. See DTC P0171: TOTAL FUEL TRIM IS GREATER THAN ALLOWED SPECIFICATION, OR P0172: TOTAL FUEL TRIM IS LESS THAN ALLOWED SPECIFICATION .
  4. Turn ignition off. Disconnect HO2S No. 1 connector and PCM 16-pin connector C22. Check for poor terminal contact at HO2S No. 1 connector and PCM 16-pin connector C22. If poor terminal contact is found, repair as necessary and go to DTC CONFIRMATION TEST . If connections are okay, check for open or short in Red wire between HO2S No. 1 harness connector terminal No. 2 and PCM 16-pin harness connector C22 terminal No. 13. See Figure. Also check for open or short in Light Green/Black wire between HO2S No. 1 harness connector terminal No. 1 and PCM 16-pin harness connector C22 terminal No. 9. See WIRING DIAGRAMS article. Repair as necessary. If wires are okay, replace HO2S No. 1 and go to DTC CONFIRMATION TEST .
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