Mercedes Euro 6 ACM Faults
Mercedes Euro 6 vehicles rely heavily on the Aftertreatment Control Module (ACM) to manage emissions and system performance. Over time, however, faults can develop within the ACM, leading to a range of warning lights, fault codes, and drivability issues. As a result, early diagnosis is important to avoid costly repairs and downtime. In many cases, ACM faults are triggered by communication problems, sensor failures, or internal damage. Therefore, recognising the signs early can help you take action before bigger problems appear. In this blog post, we will explain the most common ACM faults, highlight their symptoms, and show you how professional testing and repairs can restore your vehicle’s full performance.
Common Faults:
- Fuses being blown
- Intermittent faults with the unit
- Communication faults
- Oil ingress
- Unit unresponsive
- Connector damage
- Engine cutting out on vehicle
- Water ingress
- Fault codes within the unit
- Injector faults
Common ACM Faults in Mercedes Euro 6 Vehicles
Blown Fuses
To begin with, one of the most common problems with the ACM is blown fuses. This can cut power to the module, so the system may shut down or fail to start. Because of this, blown fuses often point to a deeper electrical fault. So, it is important to check thoroughly before replacing parts.
Intermittent Faults
In addition, intermittent faults can make diagnosis harder. They might cause random warning lights, reduced performance, or loss of communication. As a result, testing the unit properly is usually needed. In many cases, internal wear or damage is the cause. So, early checks can help stop future breakdowns.
Communication Faults
Similarly, the ACM must talk clearly to other control units. When communication faults happen, systems can shut down, show errors, or enter limp mode. Also, other connected modules might show faults too. Because of that, quick action is important to stop more damage. If left unchecked, the problem can spread.
Oil Ingress
Another big issue is oil getting into the wiring loom or connectors. Likewise, oil contamination can short circuits and cause faults. Both problems can lead to total module failure if ignored. In addition, oil damage often spreads to other systems. So, early repairs are key to avoid bigger costs later.
Unit Unresponsive
Sometimes, the ACM stops responding completely. The module might not power up or allow communication. Even so, many unresponsive units can still be repaired. In fact, careful testing often finds simple faults that can be fixed. So, it is worth testing before replacing the module.
Connector Damage
Also, connector damage is a frequent cause of ACM problems. Broken pins, rust, or bent terminals can block signals. Because of this, checking the connectors first can save time. Plus, catching connector issues early helps avoid bigger internal faults.
Engine Cutting Out
Likewise, ACM faults can cause the engine to cut out while driving. Usually, this happens when the module loses key sensor data. Fixing the ACM often solves this quickly. In other words, a working ACM keeps your engine running safely. As a result, you avoid breakdowns and stay on the road longer.
Water Ingress
Additionally, water ingress is another major threat to the ACM. Moisture can cause rust, short circuits, and total failures. For example, even small amounts of water in a connector can trigger faults. As such, protecting the ACM against water is vital for long life.
Fault Codes Stored in the Unit
Also, the ACM may store many fault codes even when no clear fault shows. These hidden codes offer early warning signs. For example, throttle or injector faults often point to ACM trouble. So, reading and checking stored codes helps avoid bigger failures later on.
Injector-Related Faults
Finally, injector faults can come from ACM problems too. These include misfires, poor fuel delivery, or lost injector signals. If no injector issues are found, the ACM is often to blame. Fixing the unit usually restores full control. Plus, solving injector faults helps save fuel and cut emissions.
Part Numbers
A0004463954, A4704460054, ACM2.1, 0004463154, 0004466754, 0004464354, 0004463254, 0004466754, 0004463454, 0004464954, 0004463954, 0004464854, 0004465854, 4704460054, A0004464054, 000 446 27 54, 000 446 43 54, 000 446 48 54, 000 446 25 54, 000 446 31 54, 000 446 34 54, 000 446 40 54, 000 446 42 54, 000 446 43 54, 000 446 49 54, 000 446 58 54, 000 446 64 54, 000 446 67 54, 000 446 85 54, 000 446 92 54, 000 446 96 54, 000 446 32 54, 000 446 00 54, 000 446 39 54, 470 446 00 54, 0004462754, 0004464354, 0004464854, 0004462554, 0004463154, 0004463454, 0004464054, 0004464254, 0004464354
0004464954, 0004465854, 0004466454, 0004466754, 0004468554, 0004469254, 0004469654, 0004463254, 0004460054, 0004463954, 4704460054, A000 446 2754, A000 446 4354, A000 446 4954, A000 446 4254, A000 446 6454, A000 446 4054, A000 446 5854, A000 446 4854, A000 446 3154, A000 446 6754, A000 446 3454, A000 446 2554, A002 446 9254, A000 446 9654, A002 446 9654, A000 446 9254, A000 446 3254, A000 446 0054
In conclusion, if your Mercedes Euro 6 vehicle is showing any of these ACM-related faults, do not wait. We can test and repair your ACM quickly and affordably. Contact us today to send in your unit and get back on the road fast. Above all, acting early saves you time, money, and stress.
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Common Questions:
We at Essex Recons strive to exceed your expectations in the quality of our repairs. We aim to complete our repairs in a timely fashion while adhering to all ESD safety measures when working on sensitive equipment.
These units come with a 36 month warranty.
To pay for the rebuild, simply click the product link(s) above to select the module you require. After that, place your order directly through our website. Once your order is complete, carefully package your unit inside a sturdy box with plenty of protective material. In addition, make sure you include your contact details and order number inside the box. Then, send your package to us using a tracked courier service. As soon as we receive your unit, we will test, rebuild, and return your module, complete with a 36-month warranty.
To get your unit collected, simply give us a call on 01708 206343 for your free collection. Then, you will be able to speak to a friendly member of our team who will guide you through the collection process.
