Fastrthnu

Hello, I scanned my 2002 Camaro SS yesterday because the engine light was on of course and 3 seperate codes came up. I Know what the codes stand for after looking it up, but was wondering if these are all related somehow and also, if these are problems that I can fix myself and how? Thank you

shoebox

You posted in the LT1 forum. The folks in the LS1 forum probably have better suggestions.

Injuneer

Moving............................................ .................

Fastrthnu

Sorry, didn't realize I was in the LT1 thread...thanks

Marc 85Z28

P0141 is for bank 1 sensor 2 O2 sensor heater circuit
P0161 is for bank 2 sensor 2 O2 sensor heater circuit
P1416 is for a failed bank 2 AIR system low/no flow detected

For P0141 and P0161: Disconnect both catalyst monitors (rear oxygen sensors... after cat) and measure the resistance on the heater side. You should see about 1 ohm. If you have an open circuit, you have a failed sensor. If you have continuity across the heater circuit, check for power to the sensor. Remember, you are checking the heater side of the sensor!

For P1416: Replace the AIR check valve on bank 2 - preferrably both banks - they are failure prone.

Fastrthnu

Thank you for the reply...I'm not sure where the o2 sensors are located or the air check valve? can someone tell me if replacing the o2 sensors is something I can do myself? I've never messed with emissions on any car so this is new to me. thank you

Marc 85Z28

The catalyst monitors (rear O2 sensors) are located in the exhaust system, after the catalytic converters. All you should need to replace them is a 7/8" wrench. The pink wire leading to the sensor is heater power, the black wire is heater ground. Test the sensor side for an open circuit. Or... you could just replace both sensors and see what happens, but I usually don't recommend throwing parts at a vehicle.

For the AIR check valves: they are in the engine bay. Each exhaust manifold has a small metal tube bolted the the front to which the check valve mounts on. The valve is connected on the other side with a rubber hose. The valves rust and seize. They can be a major PITA to replace. Best bet is to remove the metal pipe and check valve as an assembly (unbolt the 10mm bolt at the manifold). Usually it is necessary to heat the valve with a torch to remove it from the pipe.

Fastrthnu

Thank you...so when purchasing the o2 sensors...are they specific to the rear or front? Are they universal because all of them on the advance auto parts website have the same part number...thank you again

Marc 85Z28

The front and rear sensors are not the same.

Fastrthnu

Thank you guys