Impaired Powertrain Function of Freightliners - What You Need to Know
By JEREMY PROOME on Jul 17, 2025A freightliner truck encountering an impaired powertrain function may be experiencing a number of different issues, such as mechanical, electrical, and performance problems.
The problem may be signified by an ‘Impaired Powertrain Function’ warning light that appears on some larger vehicles.
Common symptoms of impaired powertrain function include warning lights, engine issues, transmission problems, a loss of power, and steering complications. Thankfully, CPCs can be repaired.
What could be the problem?
The CPC (common powertrain controller) is a common source of an impaired powertrain issue. It could be malfunctioning and is failing to connect with other modules and components.
Poor grounding with the vehicle’s electronics can cause a failure in the communication between modules.
What’s best to do?
A vehicle with an impaired powertrain can cause further damage to the vehicle. It’s best to get it diagnosed properly, and getting the right error code to find out the source of the problem. Thankfully, repairs of the Impaired Powertrain Function are possible.
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Our team has over 30 years experience in automotive electronic repairs. We specialize in German vehicles such as BMW, Mercedes and Mini. Our main focus is engine control unit repairs ( ECU, PCM or DME). Our state of the art facility has over 30 test vehicles to ensure that all parts are tested in actual vehicles before being returned to our clients.
Most of the services we provide is plug and play and doesn't require any additional coding.
