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Volvo ec160b 128 PID 45 4 code

Scotthitchens

Member
Joined
Jun 30, 2019
Messages
13
Location
Delaware
Hey guys I’ve got code 128 pid 45 4 code coming up while running today and can’t seem to find a solution, I know it has something to do with the preheat system but can’t find the glow plug relay
 

uffex

Senior Member
Joined
Jan 23, 2012
Messages
4,464
Location
Lincoln UK
Occupation
Admin
Good day
The preheat relay is located on the front of the fuel tank you have to remove the composite cover.
Kind regards
Uffex
 

Scotthitchens

Member
Joined
Jun 30, 2019
Messages
13
Location
Delaware
Thanks for the speedy reply! Do you happen to know which relay that it is? Only thing I can find is the Ecm and data relay as all the others are for horn, travel, quick connect and light functions!
 

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,518
Location
Will county Illinois
Occupation
Mechanic
Wrong cover. In the battery box above the batteries is a tin guard that is a pain in the butt to remove. Once that's out of your way , you'll see 3 relays. One square, one round and one flat. Typically the square black plastic is the one you'd be after. Make sure the green feedback wire is attached to the grid heater post before getting to crazy
 

uffex

Senior Member
Joined
Jan 23, 2012
Messages
4,464
Location
Lincoln UK
Occupation
Admin
Good day
You may find the attached useful
Regards
Uffex
 

Attachments

  • 160B preheat.pdf
    2.9 MB · Views: 19

Scotthitchens

Member
Joined
Jun 30, 2019
Messages
13
Location
Delaware
Thanks for all your help guys, fuse 27 is blown and continues to blow if replaces, do I have a short somewhere I’m guessing?
 

uffex

Senior Member
Joined
Jan 23, 2012
Messages
4,464
Location
Lincoln UK
Occupation
Admin
Good suggestion work along the system to find the cause do not overlook the eliment if it blows the engine can swallow the bits.
KR
Uffex
Unplug your preheat relay and try again. If the fuse fails. You have a harness issue, if not, you simply need the relay.
 
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