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CPC4 Module Repair for Freightliner Cascadia, Western Star, Thomas Saf-T-Liner School Bus
A CPC4 Module - cover removed. With multiple microprocessors, repairs are beyond the scope of DIY tools.
Whether you are a fleet operator or an owner-operator, a truck with a bad CPC4 Module isn’t earning its keep. Be it a dump truck, school bus, box truck, or utility truck, a parked fleet truck is never good for business. While technology has improved commercial truck reliability and efficiency, the same technology can also put the brakes on your workday when it fails. If it's the CPC4 module, repairing the existing unit is almost always a better alternative to buying and configuring a replacement part.
What is a CPC4 Module?
The CPC4 serves as the interface between the MCM (Motor Control Module) and various vehicle functions, including the instrument cluster, accelerator, brake pedal, transmission, cruise control, and brake switches. In essence, it acts as the main switchboard, enabling seamless communication between different computer modules throughout the vehicle. A lot of important vehicle functions pass through one CPC4 module, making it a critical part of your truck.
What Goes Wrong?
Usually, the CPC4 is tucked inside the dashboard behind the upper center panel. While the module itself is located in a safe area away from the elements, it isn’t the environment that causes CPC4s to fail. Original component design is almost always the cause for CPC4 module failure. After studying and repairing hundreds of failed CPC4 modules, UpFix has determined that excessive conformal coating on the circuit board is the main culprit. An excessive conformal coating layer reduces circuit component lifespan, which is ironic considering this coating is supposed to protect the module and provide a long service life.
Signs of a Failed CPC4 Module
A bad CPC4 module can manifest in several ways. Here are the most obvious issues you can observe from behind the steering wheel:
- Engine No-Start
- No Response from the Accelerator Pedal
- "Check Engine" Light Is On
- "DEF" Light Stays On
- "ABS" Light Stays On
Hooking up a diagnostic tool after noticing any of the above problems you will likely encounter the following trouble codes:
- SPN 609/FMI 12 CPC Hardware Failure
- SPN 3510/FMI 4 Accelerator Pedal Supply Voltage Failed Low
- SPN 2623/FMI 8 Accelerator Pedal Signal 2 Missing
- SPN 91/FMI 8 Accelerator Pedal Signal 1 Missing
If any of these sound familiar, then your CPC4 has taken a hike. Luckily UpFix can repair Common Powertrain Controller Modules (CPC4) on the following vehicles:
2013-2019 Freightliner M2 106 Terex
2013-2019 Thomas Saf-T-Liner C2
2013-2019 Thomas Saf-T-Liner C2 Jouley
2013-2019 Thomas Saf-T-Liner EFX
2013-2019 Thomas Saf-T-Liner HDX
2014-2019 Western Star 4700 SF
2014-2019 Western Star 4900 SF
This Western Star 4900 Day Cab can pull a mountain, but not if the accelerator pedal doesn't work. UpFix it.
Why Choose an UpFix CPC4 Module Repair?
Taking a moment to price out a new CPC4 module clearly shows it is a very expensive part. Even if you try to save money by buying a (hopefully) good, used CPC4, it’s only a matter of time before it fails in the exact same way as your current module. Beyond hardware costs there also are costs for programming a new or used module to your specific vehicle. That’s right, your CPC4 is VIN-encoded from the factory and won't work unless everything matches up. So what to do? Send it to UpFix!
Since UpFix starts with your original, matching VIN-encoded CPC4 module there are no issues with programming. You get your original CPC4 module back, ready for plug-and-play installation, but now it is completely rebuilt and ready to go.
UpFix uses high-tech BGA machines to position and secure replacement microprocessors in CPC4 Modules.
Why Choose UpFix?
Rebuilding a CPC4 module takes a highly-trained team with the right tools. Our technicians have earned IPC, J-STD, and General PCB troubleshooting certifications. High-tech advanced BGA rework stations give our technicians precise control over the repair process. We use state-of-the-art Weller soldering irons for precise, long-lasting connections. And to top it off our work comes with a one-year warranty that can be extended up to a five-year warranty.
Getting your truck back on the road is easy. Just remove your existing CPC4, place your order, and follow the shipping directions found HERE. There's no core deposit required, and you'll have your CPC4 back in just a few days ready to go.
CPC4 Module Repair Service: How To Order
Just remove the CPC4 module from your truck. Do NOT attempt to remove the cover from the module as major damage to internal components may result. Pack the unit carefully then use one of the links below to visit UpFix.com. Find your year/model and follow the instructions to reserve your repair service.
Applications: Freightliner, Western Star, Thomas - more applications are added regularly
During checkout, UpFix provides you with a helpful Drop-N-Go shipping label to save you from having to stand in line at a shipping store. You just tape the label to your sealed package and drop it off at FedEx in your town such as Walgreens, Office Max, Dollar General UPS store, etc. Learn more about drop-off locations here:
Fed Ex:https://www.fedex.com/en-us/shipping/drop-off-package.html
These days, shipping a package could not be easier. Most towns have a dozen shipping locations including supermarkets, pharmacies, and actual shipping stores. UpFix makes the shipping process even easier by providing you with a pre-printed Drop-N-Go label, so you don't need to wait in line.
