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Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> External Pages >> Different car >> Section 518 (Powertrain Diagnostic Procedures) >> Diagnostic Procedures >> DRIVEABILITY - NGC - Diagnostic Tests >> P0133-O2 Sensor 1/1 Slow Response, P0139-O2 Sensor 1/2 Slow Response >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
  1. GOOD TRIP EQUAL TO ZERO
  2. EXHAUST LEAK
  3. O2 SIGNAL CIRCUIT
  4. O2 RETURN CIRCUIT
  5. O2 SENSOR