You are here:

Truck Repair/freightliner fault code


QUESTION: I have a 2007 freightliner century. all lights work except for the running tail lights. they work as blinkers and turn signals and stop lights, but wont come on as running lights. what could be the problem?

ANSWER: You can check your fuse panel to make sure but all your marker lights should be on the same fuse. Easiest thing to start is on your passenger side frame rail should be around the back of the cab there will be two connectors unplug those and with your lights on see if you have power there if you do then your problem is on towards the back of the truck. more then likely there is a broken wire somewhere. would check around where your lights plug in check those pins and the buddle of wires by the lights before it starts down the frame rail that's where they normally break at.

---------- FOLLOW-UP ----------

QUESTION: my 2007 freightliner century with a 60 series Detroit is giving me fault code: calib 128 411 13. do you know what this means?

ANSWER: 128 is your engine 411 13 is delta p sensor or differential pressure sensor. Location of that is passenger side you will see a rectangular box sitting on the thermostat housing with two pipes that travel straight down. Could be those pipes are plugged with soot, sensor could be bad, or a programming issue.

---------- FOLLOW-UP ----------

QUESTION: is that sensor inside the rectangular box? or is that box the sensor?if the sensor is bad, or the pipes have soot, what damage will it do to the engine?

the rectangular box is the sensor it will be held down with two bolts a electrical plug and couple O-rings underneath it. It won't cause any engine damage but your also not going to run at peak performance. If your trying to eliminate a shop visit you could disconnect the two pipes on both ends and blow air through the pipes. Sensor is relatively easy to change you could do that yourself too.  

Truck Repair

All Answers

Ask Experts


Jeff Drumm


I Can answer any question pertaining to semi trucks and trailers. Have no experience in the automotive field so not able to help in that area.


My experiences in Semi Trucks is. I own my own truck and i presntly maintain a 80 truck fleet. Can handle any questions pertaining to a truck have tore apart and rebuilt every aspect on them. Fleet I deal with is Mainly Volvo trucks and a handful of freightliners. Work on automated transmissions on a daily basis along with carrier apu's. With engines my specialty is the 60 series Detroit but do work on the cummins isx the n-14 and the ism. and also the Volvo engines.

Have a College Degree from university of northwestern ohio in diesel and agriculture mechanics. Have 10 years behind the wheel driving a truck and 4 years working on trucks full time. Also have grown up on a farm so have been tinkering on trucks and tractors all my life.

Awards and Honors
I've gone through online schooling and have received certificates from webb wheel, Timken and Volvo academy.

©2017 All rights reserved.