have a mechanic check your turbo.most will tell u that a turbo blows black smoke but can aslso blow white smoke when turbo is malfunctioning
Where is the leak coming from. Most likely you will need to replace the exhaust manifold gasket which will require removing the exhaust manifold.
check your coolant levels & if car overheating, might well be the cylinder head gasket is away.
Do you see white smoke coming out of your exhaust , even when the engine is warmed up ? If so , it could be a bad head gasket , a warped head , or a cracked head
White smoke from the exhaust pipe is a sign of coolant entering the combustion chamber. Commonly caused by a blown head gasket. STOP driving this vehicle until you have this repaired or you will destroy this engine.
it's in the down pipe coming from your exhaust manifold. you will have to remove the heat shield from the exhaust manifold to access it
The oxygen sensor is located in the exhaust manifold before the catalytic convertor. If you look down between the radiator and the exhaust manifold a few inches before the exhaust pipe connects to the exhaust manifold you will see the Oxygen sensor. The sensor will have 2 wires coming from it and it kinda looks like a sparkplug stuck into the exhaust manifold. There is 2 nuts that hold the oxygen sensor into the exhaust manifold.
By "exhaust manifold sensor" do you mean the O2 or oxygen sensor? The only sensor I know of on a exaust manifold is the O2 sensor and if you follow the manifold you will see 2 sensors sticking out they will have (usually) green wires coming from them
Bad head gasket? Oil mixing with coolant?
The head gasket is blown.
If there is oil coming from the exhaust manifold it generally indicates a bad valve stem seal or a worn out engine. (too much crankcase pressure)
The egr valve should be coming off of the exhaust manifold.
coolant leaking into the engine