broncobeater Posted March 15, 2018 Share Posted March 15, 2018 Hello to all. First time on here. Searched 10 pages of threads and did not locate my issue. As title says I have a 2013 CHU 613 Mack w/mp-8 motor. When I turn on the key, even on accessory the oil pressure gauge pegs at 101psi. Once started and warmed up it still reads 101psi. I'm thinking grounded out sensor or harness but not sure where sensor is located. Any help appreciated. Also truck has around 205,000 K miles on it. Darrell Quote Link to comment Share on other sites More sharing options...
Mackpro Posted March 15, 2018 Share Posted March 15, 2018 Replace the oil pressure sensor, Mack has gone through 4-5 different sensor changes, the new one that is out now seems to work great. Its located on the driver side of engine to the right of the engine ECM. Its not the one on top of the oil filter stand. Quote Link to comment Share on other sites More sharing options...
broncobeater Posted March 15, 2018 Author Share Posted March 15, 2018 Thankyou much for that tidbit of valuable location information. Much appreciated on a damn busy day. Darrell Quote Link to comment Share on other sites More sharing options...
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