Repair Procedures

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: A new converter with less than 100 miles on it may set P0420 due to out-gassing of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition.

Catalytic Converter Replacement (RPO L61) or Catalytic Converter Replacement (RPO LE5) or Catalytic Converter Replacement (RPO LSJ)
Heated Oxygen Sensor 2 Replacement
Exhaust Leakage
Restricted Exhaust