If an engine light is still on after replacing a fan's radiator sensor in a RFW engine the coolant sensor should also be checked. If the coolant sensor is bad it will send an error code to the car's computer.
Faulty sensor get it replaced if not check to make sure wire isn't shorting out
Why you had replaced the air mass sensor? the light was on before the replacement the light is one you have a malfunction on your engine or maybe the fault for the air mass sensor is stored on engine control unit. The best is check the engine with the StarDiagnisis on dealer Mercedes
I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?
Good Chance this is caused by a faulty O2 Sensor. I had the engine light stuck on in my 2002 Montana and replaced rear O2 sensor and it turned it off.
If these two lights come on together then the extra traction sensor is broken and needs to be replaced when the sensor is fixed the check engine light will go off and the ets light will work properly again.
If your vehicle has a bad sensor the check engine light will come on. Otherwise they should be replaced as recommended by your service manual.
Could be the knock sensor.
There are 2 knock sensor on the 5.3L engine. And they are under the intake manifold. To get to them you will have to remove the whole top of the engine- INTAKE MANIFOLD. Why do you think they need replaced???? check engine light came on for 2 sensor
Not sure if this will help but try this answer on another site. http://answers.yahoo.com/question/index?qid=20060623092709AAKy5vf
There isn't one; If the coolant level is ok, and the warning light still comes on, you have a defective sensor that needs to be replaced. It is located on the passenger side of the radiator with the wires running back towards the engine. Usually.
If an Explorer engine oil change soon light stays on, the sensor needs replaced. The sensor may also need reset by holding the button down for five seconds.
On our '92 the light comes on when the water level in the resovor is low. If you have the correct level of coolent possibly your sensor could be bad. Try filling the plastic resevior if it is low. There is a sensor on top of it that makes the light come on even though the temp is not hi.