MikeD Posted June 30, 2017 Share Posted June 30, 2017 Can someone tell me what the following fault code is for? mack fault code 5021 m128 01 02f Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/ Share on other sites More sharing options...
MikeD Posted June 30, 2017 Author Share Posted June 30, 2017 mack fault code 5021 m128 01 03F and mack fault code 5021 m128 08 08f Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-373823 Share on other sites More sharing options...
Mackpro Posted June 30, 2017 Share Posted June 30, 2017 What year and model of engine? If ETECH style its the engine position sensor on front of timing cover. If MP style , its the camshaft sensor on RH side of rear upper timing cover. MID 128, SID 021, FMI 2, 3 and 8 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-373836 Share on other sites More sharing options...
MikeD Posted July 2, 2017 Author Share Posted July 2, 2017 Mack mp8 titled 2008. Built in 07 cxu613 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-374001 Share on other sites More sharing options...
MikeD Posted July 6, 2017 Author Share Posted July 6, 2017 I'm going to stop my Mack to grab a camshaft sensor. Parts was calling a engine speed sensor? Do you know what 5047 M128 01 01F is? Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-374278 Share on other sites More sharing options...
Michael88 Posted October 25, 2018 Share Posted October 25, 2018 (edited) Hi everybody! I found Mack truck fault code here: https://www.pdfmanual4trucks.com/mack/mack-truck-fault-codes-list/ and here in PDF - https://truckmanualshub.com/mack-truck-service-repair-manuals-pdf/ Edited October 25, 2018 by Michael88 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-408455 Share on other sites More sharing options...
igor2009 Posted February 28, 2019 Share Posted February 28, 2019 MACK Truck Fault Codes Mack Fault Codes list Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-416848 Share on other sites More sharing options...
fjh Posted February 28, 2019 Share Posted February 28, 2019 (edited) On 7/2/2017 at 3:39 PM, MikeD said: Mack mp8 titled 2008. Built in 07 cxu613 Be sure you check that your clutch brake is working! If not you would be well advised to remove the clutch cover and check for clutch brake pieces Or you may end up doing this job twice or even three times! Clutch brakes have been known to break and take out speed sensors! Just sayin! Edited February 28, 2019 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-416858 Share on other sites More sharing options...
Nik Posted January 20, 2021 Share Posted January 20, 2021 Can someone tell me the following codes meaning: 5001-m36 I drive a 2019 mack for my job and it's been losing power and acting up 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-467329 Share on other sites More sharing options...
Miriam Posted February 20, 2022 Share Posted February 20, 2022 Can someone tell me what SPN 1265. FMI3 is? Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-489906 Share on other sites More sharing options...
Onyx610 Posted February 21, 2022 Share Posted February 21, 2022 Engine Piston Cooling Oil Pressure Actuator/Voltage above normal or shorted to high source. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-489910 Share on other sites More sharing options...
Onyx610 Posted February 21, 2022 Share Posted February 21, 2022 Either replace the actuator or there is a short in the harness. Actuator should be on the oil cooler. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-489911 Share on other sites More sharing options...
Onyx610 Posted February 21, 2022 Share Posted February 21, 2022 I think most just replace the harness instead of repairing it. I bet your actuator took a shit… Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-489917 Share on other sites More sharing options...
Onyx610 Posted February 21, 2022 Share Posted February 21, 2022 Please post the fix though 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50342-mack-engine-fault-codes/#findComment-489918 Share on other sites More sharing options...
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