So, it is time for my tag renewal and in California we have to get a smog check first. They will fail you if your "Service Engine Soon" light is on. This is the second time I have had this problem with my 2002 Camaro Z28. I took it to a shop and they fixed it immediately, no charge, saying that at some point I must have left the gas cap off and it just needed to be reset. Four months later, the light has come on again. I had it diagnosed and the codes were P0410, P0442 and P1416. The service agent told me that P0442 was probably due to a small evap system leak. He showed me my gas cap and there were lots of cracks in the seal on the inside. He suggested I buy a new gas cap from the dealership, which I did. The light has still not gone off. What could possibly be the cause of the other two codes? Is there a way to "clear" the codes and see if the problem persists? If so, is there a way I can do this myself? I am pretty clueless when it comes to cars. I need to do this soon, as my tag renewal is up in two weeks. I am also unemployed, so car repairs are not in my budget right now. Any help you could give me would be greatly appreciated!!!! Thanks in advance.

 

You need a OBDII scanner to read and clear the codes, and a repair manual to fix the problems properly

P0410 Secondary Air System fault
Common Problems That Trigger the P0410 Code:
Defective Check Valve(s)
Faulty Air Pump or Air Pump Relay
Faulty air control solenoids or vacuum lines
System may be restricted or plugged with carbon
Common Misdiagnoses:
Air Pump Check Valves function, but are slightly restricted
Air Pump is replaced when the relay is the problem
Parts are replaced when the the system is restricted or plugged with carbon

P0442 Evaporative System Malfunction, Small Leak
Common Problems That Trigger the P0442 Code:
Defective or damaged fuel cap
Distorted or damaged Fuel Tank Filler Neck
Small tear or puncture in the Evaporative system hose(s) and/or Carbon Canister
Defective Fuel Tank Sending Unit gasket or seal
Small split in a seam of the Carbon Canister
Defective Evaporative Vent Valve and/or Evaporative Purge Valve
Defective or damaged Fuel Tank
Defective Fuel Tank Pressure Sensor
Defective Leak Detection Pump
Slightly loose and/or worn clamps or hardened O-rings anywhere in the EVAP system
Common Misdiagnoses:
Fuel cap
Evaporative Purge Valve
Evaporative Vent Valve

DTC P1416 Secondary Air Injection (AIR) System Bank 2
The PCM monitors the heated oxygen sensor (HO2S) voltages in order to diagnose the AIR system.

During the AIR test, the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors the HO2S voltages and monitors the short-term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low, and the short term fuel trim should go high.

If the PCM determines that the HO2S voltages for both banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 for bank 1 or P1416 for bank 2 in order to indicate on which bank the AIR system is inoperative

P0410 and P1416 are related and are indicating that the O2 sensors are not seeing fresh air being blown into the exhaust. Make sure the AIR pump operates when the engine is first started. If it runs (sounds like a small vacuum cleaner) make sure the plumbing to the exhaust is not clogged or leaking, and that the check valves are not stuck closed.