The automobile fault code U1879 indicates a problem with the Engine Control Module (ECM) or its related wiring harness and connectors. The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light. The cause of this fault code could be a faulty ECM, an open or shorted ECM harness, or a poor electrical connection in the ECM circuit.
The importance of repairing this fault code lies in the fact that it can affect the performance and efficiency of the engine. The repair difficulty is moderate, and the repair time is estimated to be around 1.0 hour.
To fix this issue, one should visually inspect the wiring harness and connectors for any damage or corrosion and check for broken or bent pins.
Repair Importance Level | 10.0 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 10.0 (Out of 10) |
Unveiling U1879: Common Symptoms You Should Know
If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be a sign of u1879 fault code.
Here are the symptoms to look out for:
- The U1879 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
- Other symptoms may include issues with the transmission, such as difficulty shifting gears or the transmission slipping.
- The vehicle may also experience reduced power or acceleration, and the engine may stall or hesitate during operation.
- Additionally, the vehicle may experience issues with the fuel system, such as difficulty starting or poor fuel efficiency.
- It is important to address these symptoms promptly to prevent further damage to the vehicle.
Decoding U1879: Common Causes Of The Fault Code
The automobile fault code u1879 can be caused by a faulty ECM, open or shorted harness, or poor electrical connection.
- The automobile fault code U1879 can be caused by a faulty Engine Control Module (ECM).
- It can also be caused by an open or shorted Engine Control Module harness.
- Additionally, a poor electrical connection in the Engine Control Module circuit can also trigger this fault code.
- These are the three main causes of the U1879 fault code.
Fix U1879: Simple Steps To Solve The Fault Code
To fix the u1879 fault code, check the possible causes and inspect the wiring harness, connectors, and components for any damage or corrosion.
- To fix the automobile fault code u1879, first, check the possible causes listed above.
- Then, visually inspect the related wiring harness and connectors.
- Look for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
- This fix will take an estimated repair time of 1.0 hour.
Crunching The Numbers: U1879 Repair Cost & Complexity
The automobile fault code U1879 has an estimated repair time of 1.0 hour.
The cost of fixing this fault code is influenced by the repair time.
Most auto repair shops charge between $75 and $150 per hour for their services.
Therefore, the fixing cost of U1879 will be between $75 and $150, depending on the repair time required.
Unlocking The Mystery Of U1879 Fault Code
The U1879 fault code is related to the communication between devices connected to the serial data circuits in a vehicle.
These devices exchange operating information and commands through supervised messages. The code sets when a supervised periodic message that includes the transmitter device availability has not been received.
Specifically, the U1879 code indicates that the Drive Motor Control Module 2 has lost communication with the Engine Control Module.
FAQ
If you see the engine light on or the service engine soon warning light, it could be due to the u1879 fault code. This code is often caused by a faulty Engine Control Module (ECM), an open or shorted ECM harness, or a poor electrical connection in the ECM circuit. To fix this issue, you should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.
If you’re experiencing the u1879 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, there are a few things you can do to fix it. Firstly, check the Possible Causes listed above, which include a faulty Engine Control Module (ECM), an open or shorted Engine Control Module harness, or a poor electrical connection in the Engine Control Module circuit. To visually inspect the related wiring harness and connectors, look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
If the Engine Control Module (ECM) is faulty and causing the u1879 fault code, the engine light will be on or the service engine soon warning light will be illuminated. The cause of this issue could be a faulty ECM, an open or shorted ECM harness, or a poor electrical connection in the ECM circuit. To fix this problem, it is recommended to visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

Wrap Up
If your engine light is on, it could be due to a faulty Engine Control Module (ECM), an open or shorted ECM harness, or poor electrical connection.
Check the wiring harness and connectors for damage, broken or corroded pins.
Inspect the components and follow the possible causes listed above.