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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 106 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0133: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) Or DTC P0153: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Retrieve trouble codes. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any other codes are displayed other than DTC P0133 or P0153, diagnose and repair those codes first. If only DTC P0133 or P0153 is displayed, go to next step.
  2. Start engine and raise engine speed to 2500 RPM for about 90 seconds. Let engine idle. Using scan tool, monitor each heated oxygen sensor No. 1 output voltage. Voltage should alternate repeatedly between less than .4 volt and more than .55 volt. See Figure. If voltage is as specified, go to step  7. If voltage is not as specified, go to next step.
  3. Check for open or short circuit in wiring harness between ECM and suspect heated oxygen sensor. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. Repair wiring as necessary. If wiring harness is okay, go to next step.
  4. Ensure oil dipstick, oil filler cap, PCV system and all other air induction system components are intact and operating properly. If problem exists, repair as necessary. If problem does not exist, go to next step.
  5. Check fuel pressure. See FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is not within specification, repair as necessary. If fuel pressure is within specification, go to next step.
  6. Check fuel injectors. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING - GS300, GS430, IS300 & LS430 article. If problem exists, repair as necessary. If problem does not exist, replace suspect heated oxygen sensor.
  7. Perform test drive confirmation, then go to next step. See TEST DRIVE CONFIRMATION .
  8. Clear and recheck for DTCs. If DTC P0133 or P0153 is displayed again, replace ECM. If DTC P0133 or P0153 is not displayed again, problem is intermittent. Check component and ECM connections.
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