2003 Pontiac Aztek AWDFACTORY OEM SERVICE PROCEDURE

Inspection/Maintenance System DTC Table

INSPECTION/MAINTENANCE SYSTEM DTCS

System DTCs Required To Set System Status To YES
Catalyst P0420 
Exhaust Gas Recirculation P0401 , P0404 , P0405  Or P1404 
Evaporative Emission P0440 , P0442 , P0446  Or P1441 
Oxygen Sensor P0133 , P1133  Or P1134 
Oxygen Sensor Heater P0135  Or P0141 
Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.