Medium and Heavy Trucks
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Hi, my name is Doug.
I will need the MID numbers to those codes and which ones are active and inactive.
I will also need the last six digits of the truck VIN.
Does this engine have 1 or 2 EGR valves?
OK, it looks like there is an "open" on the delta switch. Coming out of the EGR cooler is a rubber tube and it goes to an elbow & metal tube that is vertical, and then crossover to the intake mixer. So that vertical tube is called the Venturi tube, connected to the Venturi tube in the front is a EGR differential sensor. This sensor has had a big problem with the plug in harness wires rubbing thru at plug area or the 2 small holes in sensor become plugged. Your codes look like there is an electrical short and changing the sensor most of the time helps. Its a very common problem, with the short it will bring down any sensor on this circuit and set active codes. You can take it off and check harness going into sensor, you will have to remove the protective covering at connection point. Wires will make contact to sensor and start to rub thru then is over.
I hope this helps and please rate my service for you today.
The rubbing would be wright when the wires come out of the sensor connector, it will look like a cut in the wire as the 3 wires are formed into one bunch.
That sensor scenes the difference between the turbo output and the EGR cooler output and the EECM takes that info and adjusts the turbos nozzle that affects the turbo speed.
Also there is 2 holes in Venturi tube that might be plugged up. They must be clear also or replace the Venturi tube.
I'm having trouble finding some of these codes and I'm going to have to OPT OUT and let another Tech pick up where I'm leaving off.
Sorry for the inconvenience