Resolving a Freightliner code EEC 61 | JustAnswer Blog (2024)

If you’re driving a Freightliner, code EEC 61 is never a good thing to see

Resolving a Freightliner code EEC 61 | JustAnswer Blog (1)

Long distance trucking is hard work, with tight deadlines and even tighter profit margins. When something goes wrong on a run, like a Freightliner code EEC 61, you need answers and you need them fast. That’s why many truckers turn to the mechanical Experts on JustAnswer when they find themselves in a tough spot, and tens of thousands of people read the pages that are generated from those question sessions.

You can learn a lot about people by looking at their collective behavior. On JustAnswer, the visitors to the questions that are generated from the Expert sessions are an indication of the levels of interest in a given topic. Questions in the tax category, for example, see an unsurprisingly huge jump in visitors during tax season. Categories like this are very reactive to external changes.

Resolving a Freightliner code EEC 61 | JustAnswer Blog (2)
Visitors to the JustAnswer tax category for one year

Resolving a Freightliner code EEC 61 | JustAnswer Blog (3)

Visitors to the JustAnswer heavy equipment category for one year

That pattern is a working pattern. Visits spike on Monday, start to drift a bit as the work week draws to a close, and dip on Saturday and Sunday. The pattern of a person who works hard all week, and rests on the weekends. All week, every week, all year.

Trucking is the lifeblood of the US economy, and JustAnswer is tracking the pulse.


Resolving code EEC 61

So, what keeps people coming to JustAnswer with their heavy equipment questions? Let’s take a look at one of the sessions to figure it out.

The most visited question in the heavy equipment category starts with an error code on a Freightliner, code EEC 61. This is a long-distance trucker’s nightmare; hundreds of miles from the nearest service, over a thousand miles from home base, and a truck that may or may not make the drive.

The Expert in this session is bluextc89, a journeyman in industrial hydraulics repair with over 13 years of experience. He responds with the following information:

“EEC 61 is basically saying there is a problem in the After-treatment control module. This is the module the engine uses for the after-treatment system. Your Check Engine Light, and/or your Maintenance light will be on at the same time.

The maintenance light is the light that looks like a solid yellow engine.

Make sure your DEF (Diesel Exhaust Fluid) tank is 1/2 to FULL, you have a indicator on your fuel gauge with 4 green squares, this is your DEF level.

If your DEF got low, it will throw an EEC61, but you need to fill the DEF tank 1/2 full or more. After you drive awhile, after 3 key cycles that light should go off. IF THIS IS THE PROBLEM.

If you do not fill it up, the Engine will Derate to 25%, then if you continue to drive, it will derate you to 5 miles per hour.

This is just a little bit of info, hopefully, it is just low of DEF.

If the truck was low on air pressure when you turned the truck off, the DEF system performs a purge routine to clear the lines, if it does not detect air pressure, it will set this also.

It's driveable unless you run into the DEF issue I listed above. If you continue to have a problem, I suggest taking it to the nearest dealer.”

The customer is quickly able to figure out which of the options is the most likely culprit:

“Def 3/4...but...I got the maint. Light after trying for several minutes to move my tandems...so the Low air psi note rang likely in my ears...If it is due to low air psi, will the light go away after the third key cycle? Either way, very good answer...Thank you”

And that’s why people keep come to JustAnswer; fast, reliable information that gets you back on the road quickly.

Resolving a Freightliner code EEC 61 | JustAnswer Blog (4)

Regular maintenance of your engine can help prevent problems later.

Freightliner truck maintenance

Of course, no on-the-spot solution can compare with not needing a repair in the first place. Keeping to a realisticmaintenance schedulewill help you to minimize breakdowns by catching problems before they happen. You should refer to yourowner’s manualto determine the best maintenance and troubleshooting practices for your make and model.

Before each long haul, be sure to check the following:

  • Check your oil level.
  • Check your radiator and overflow bottle. Watch for leaks!
  • Test the air pressure in your tires.
  • Check the fuel vent if the truck has been sitting for a few days.
  • Watch out for vibration or squealing noises from the brakes, and have them checked frequently.

As a vehicle ages, you’ll want to increase the frequency of maintenance checks. If you start to catch fines from the FMCSA for Compliance, Safety and Accountability (CSA) violations, it’s a good sign that you should increase the frequency of your maintenance checks.

If you do find yourself out on a long run, and you encounter a problem like a Freightliner code EEC 61, the Experts on JustAnswer are available at any time to help you with yourheavy equipment questions. When you aren’t sure what your best option is, the knowledgeable advice they provide can help you determine if you can push ahead, or if it’s time to take immediate action.

What’s your worst on-the-road heavy equipment experience? Please share it with us in the comments below.

Resolving a Freightliner code EEC 61 | JustAnswer Blog (2024)

FAQs

Resolving a Freightliner code EEC 61 | JustAnswer Blog? ›

Make sure your DEF (Diesel Exhaust Fluid) tank is 1/2 to FULL, you have a indicator on your fuel gauge with 4 green squares, this is your DEF level. If your DEF got low, it will throw an EEC61, but you need to fill the DEF tank 1/2 full or more. After you drive awhile, after 3 key cycles that light should go off.

What does EEC 61 mean? ›

EEC 61 is basically saying there is a problem in the After-treatment control module. This is the module the Engine uses for the aftertreatment system. Your Check Engine Light, and/or your Maintenance light will be on at the same time. The maintenance light is the light that looks like a solid yellow engine.

What is code 545 25 on Freightliner? ›

Most likely it thinks the DEF tank is empty because you have the 545 25 codes which is the sensor for the level valve in the tank itself. This will also cause you to have the issue wit hteh dpf system when that level sensor is faulting. Have that sensor tested and that level sensor changed out.

What is the code CDU 42 on a Freightliner? ›

Cdu 42 is a voltage issue. Make sure alternator is charging at 14.2-14.8 volts.

What does EEC mean on a truck? ›

The Ford EEC or Electronic Engine Control is a series of ECU (or Engine Control Unit) that was designed and built by Ford Motor Company. The first system, EEC I, used processors and components developed by Toshiba in 1973. It began production in 1974, and went into mass production in 1975.

What is the EEC on an engine? ›

Electronic Ignition & Engine Control

Whether we realize it or not, most cars today benefit from electronic ignition and electronic engine control (EEC) technology. If you press a button to start and stop your car, you have an EEC on board.

How to clear eec 61 code? ›

This is an aftertreatment code. Make sure your DEF tank is at least half full. Make sure the truck doesn't get shut off with low air pressure or the lines can't purge. Try cycling the key on and off 3 times and see if the code remains.

How do you manually reset engine codes? ›

Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times. If the check engine light remains after the reset, you might still have a problem with your vehicle.

How do I permanently clear my engine code? ›

Leaving the battery disconnected for a few minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Secure the negative cable back to the terminal and cover it with the cap. Disconnecting the battery will clear the error codes and reset the check engine light.

What is code 63 on Freightliner? ›

Fault Code 63 indicates a failure of the circuit controlling the Gear Motor and the fore-and-aft movement of the X-Y Shift Finger.

What is flash code 62 on Freightliner? ›

Flash Code 62 may also indicate that the function assigned to the Auxiliary Output #1, #2, #5, #6, #7 or #8 circuit output is open, shorted to ground. This diagnostic condition is detected when the Auxiliary Output #"X" function is OFF and the DDEC III ECM measures a low voltage on the circuit output.

What is the code 27 on a Freightliner transmission? ›

Fault Code 27: Clutch Disengagement.

What is Freightliner code SPN 1243 FMI 14? ›

SPN 1243/FMI 14

Description This Fault Code Indicates a Missing Message from the Antilock Brake System (ABS) Module.

What is the code 4364 on a Freightliner ACM? ›

Description This code sets when the Aftertreatment Control Module (ACM) detects that the Selective Catalyst Reduction (SCR) NOx Conversion efficiency is low.

What is SPN 111 code Freightliner? ›

SPN 111/FMI 4

Description This Fault Sets when the Common Powertrain Controller (CPC) Detects that there is a Short to Ground on the Coolant Level Circuit or the Engine Coolant Level is Low.

What does EEC stand for? ›

European Economic Community / EEC.

What does EEC stand for on a fuel tank? ›

The Evaporative Emissions Control system (EEC), what most folks call “the charcoal canister” is one of the simplest and nearly-universal emissions control systems, that is there for several clear-cut purposes. This system has been mandated on every US market gasoline automobile since the mid-70's.

What is the meaning of EEC in electrical terms? ›

Energy Efficiency Charge or EEC means a separately stated volumetric charge to retail customers of electric or natural gas Distribution Utility customers for the support of demand- side resource acquisition pursuant, as applicable, to 30 V.S.A § 209(d)(3) and Commission Rule 5.300.

What does EEC approved mean? ›

EEC pattern approval certificate means a certificate of approval, granted by the competent authority of a Member State, in respect of the pattern of a meas- uring instrument which certificate allows for and governs the application of any EEC pattern approval symbol to any measuring instrument; Sample 1Sample 2.

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