I have had my mechanic replace multiple components in my EVAP system trying to resolve the following error codes which occur in no particular order within 24 hours after resetting my memory and cold starting.
P1133 - HO2S Insufficient Switching Bank 1 Sensor 1 P0133 - O2 Sensor Circuit Slow Response Bank 1 Sensor 1 P0130 - O2 Sensor Circuit Bank 1 Sensor 1 P0442 - EVAP System Leak Detected (small leak) P0455 - EVAP System Leak Detected (large leak)
No mechanical solution has worked so far. My only option is to replace the ECM which sounds pretty desperate and is expensive.
Any idea which component might be triggering these error codes? Maybe there is a component that my mechanic has overlooked.
My model is a Saturn Ion 2003