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MP8 goes into limp mode


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I have a 2008 Mack with an MP8 in it. Trucks starts up and runs fine then while driving down the road goes into limp mode and wont go above 20mph. A previous mechanic scaned it and said it needed the oil sensor inside the pan they did that and we still have the same problem. That is why I am now looking at it unfortunately I do not have a scan tool so I cant read the data. Any help would be awesome Thanks again!

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Pop the connector (twist style) off the LHS of the oil pan, if oil made it through you'll be needing the updated oil sender/eop sensor and pigtails. Same goes for the eop, if it's letting oil pass through the sensor, it's fubar. I've done several of these and it requires a jumper harness to be installed between the sensors and engine harness.

Edited by Graves
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Have a 2011 Mack Granite with a mp8 engine. When I bought it the one wire on the small fuel filter was not connected but never a problem. Had it serviced today and the tech plugged the wire in and now I have a fault light. Will it go into limp mode?

Edited by Bill P
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