Hello,
I have a 2014 QX60 with 150k miles on it. The car has a loud idle from inside the cabin. The engine sounds kind of like an exhaust leak or a diesel engine. I get an occasional check engine light with the code P0420 Catalyst System Efficiency Below Threshold Bank1. The Catalytic converters are 1.5 years old, new O2 sensors, New Y pipe on exhaust, spark plugs 1.5 years old. My mechanic has said that the sound is not from an exhaust leak, but he is not sure where it is coming from without additional diagnostics being ran. I have also cleaned the MAF sensor, and cleaned the throttle assembly and PCV valve. If Iput my hand on the engine cover and the Air intake manifold, I can feel a vibration that matches the sound I hear in the cabin of the car. At this point, I am not sure what to check next. Does anyone have any ideas?
Thanks,
I have a 2014 QX60 with 150k miles on it. The car has a loud idle from inside the cabin. The engine sounds kind of like an exhaust leak or a diesel engine. I get an occasional check engine light with the code P0420 Catalyst System Efficiency Below Threshold Bank1. The Catalytic converters are 1.5 years old, new O2 sensors, New Y pipe on exhaust, spark plugs 1.5 years old. My mechanic has said that the sound is not from an exhaust leak, but he is not sure where it is coming from without additional diagnostics being ran. I have also cleaned the MAF sensor, and cleaned the throttle assembly and PCV valve. If Iput my hand on the engine cover and the Air intake manifold, I can feel a vibration that matches the sound I hear in the cabin of the car. At this point, I am not sure what to check next. Does anyone have any ideas?
Thanks,