Service Code - P0161

Question

Could this code be from faulty exhaust such as converters needing replaced or incorrect size of an exhaust system? I seam to think from these posts about this code that the problem is only the sensor itself. Does this sensor not detect fuel air ratios or anything else for exhaust problems and or incorrect fuel air ratio?

Answer 1

Yes, exhaust leaks or faulty catalytic converter can affect how the sensor works. If no leaks are present the the O2 sensor is usually the problem, which is very common.

Comments

Could perhaps incorrect exhaust size throw a code? I'm wondering how I could correctly run true duals from cats back with a stock tune and keep or even gain power and gas mileage.