DTC P0139: Secondary Ho2S-2 Slow Response

Clear Diagnostic Trouble Codes. See CLEARING DIAGNOSTIC TROUBLE CODES  . Start engine. Hold engine speed at 3000 RPM under no load condition with transaxle in Neutral or Park until radiator fan comes on. Using scan tool, check HO2S-2 output voltage with engine idling at 3000 RPM. If voltage stays within 0.3-0.6 volt for 2 minutes, replace secondary HO2S-2. If voltage does not stay within 0.3-0.6 volt for 2 minutes, problem is intermittent. System is okay at this time. Check for poor connections or loose wires at HO2S-2 and PCM connectors. See WIRING DIAGRAMS article. Repair as necessary. See WIRING DIAGRAMS article. Perform final procedure. See FINAL PROCEDURE  .