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roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 5718
Experience:  Shop Froeman for Freightliner Trucks
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02 freightliner columbia. 12.7 detroit. Riding at ghway

Customer Question

02 freightliner columbia. 12.7 detroit. Riding at highway speed, with cruise. Opt light, check engine light and engine protect light comes on. Quits pulling (cruise cuts off), push accelerate lights go out. Reset cruise everything back to normal for a while, then does it again. Why, what do I need to check?
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  roybelding replied 1 year ago.

good afternoon my name is ***** ***** I will assist

can you check the flash code from the instrument cluster???


Customer: replied 1 year ago.
Flash code 74
Expert:  roybelding replied 1 year ago.

Section 70.1
Description of Flash Code 74

The SAE J1587 equivalent code for Flash Code 74 is p 70/4.‪

Flash Code 74 indicates that the Park Brake digital input is shorted to ground between the VIH connector and one of the switches (Park Brake Switch, Neutral Switch, Hood Switch or optional OEM interlock).‪

  • If this code is inactive, it may indicate that the vehicle moved during Optimized Idle® operation or that two consecutive engine start attempts were not successful.
  • Flash Code 74 may also indicate that the relay coil is open or is shorted (causing the unsuccessful engine start).

this is the description of the code.

is it currently active???

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