Questions & Answers for: Mercedes-Benz how to check cat

...A few of the most common faults with these are : HFM sensor, turbo or blocked cats. the best way to check the cats are the remove them and tap them on the ground and if dust falls out then the cats ...

...check-engine light. The twin O2 sensors on each exhaust pipe are for emissions reasons. Your primary (pre-cat) O2 sensors help the engine determine how much fuel to inject, based on reading the level ...

...cat will make the exhaust more percussive for the mufflers downstream, which could cause them to wear out more quickly. Short answer is: check your local laws on exhaust modifications, and be ready ...

...a lot of misfires and you know everything is good (i.e. spark plugs & wires, etc...), you may want to check the cat converters as one may be plugged. you can use the front O2 ports to check

...check engine light if it was on but would not cause this,how did you blow cat out, theres no blow cat out,also did you use oe o2 sensor? hope you did not use a universal sensor those are junk, check ...

...cat of to save you damage your engine.do the easy things one way is to check with obd scaner to pin point watt it is or flush radiator fit new thermostat and radiator cup check your fans  and ...

...cat passenger side, code popped back up after replacing the sensor. any ideas? The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside ...

... or the oxygen sensors or their connections. or the temp sensors. Its highly unlikely to be the cat just a sensor fault you will need a mercedes star machine to check the cat fill level and ash ...

...noises are just heat shields that have come loose check under the bonnet and under the car for loose heat shields also the heat shield around the cat can corode and come lose hopevthis helps ...

...De cat done, map and intake sensor replaced, turbo acutator replaced. Had the injectors overhauled. check if there is any broken fuel hose line, "O" rings used for sealing the fuel feeding ...