[SOLVED] Fixing U1899: Starter/Generator Control Module Communication Lost

If you see the Engine Light ON or Service Engine Soon Warning Light in your car, it could be due to the automobile fault code: u1899. This code indicates a problem with the Powertrain Control Module (PCM) or StarterGenerator Control Module (SGCM).

The cause could be a faulty PCM, open or shorted PCM harness, poor electrical connection, or faulty SGCM. It is important to get this issue fixed as soon as possible to avoid further damage to your car. The repair time for this fault code is around 1.0 hour.

To fix the issue, you should visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the Engine Light ON (or Service Engine Soon Warning Light), it could be a sign of u1899 fault code.

Here are the symptoms to look out for:

  • The automobile fault code U1899 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON.

The automobile fault code u1899 can be caused by a faulty PCM, open or shorted harness, poor electrical connection, or a faulty SGCM.

  • The automobile fault code U1899 can be caused by a faulty Powertrain Control Module (PCM).
  • It can also be caused by an open or shorted Powertrain Control Module harness.
  • Another cause of this fault code is a poor electrical connection in the Powertrain Control Module circuit.
  • Lastly, a faulty Starter/Generator Control Module (SGCM) can also trigger the U1899 fault code.

To fix the u1899 automobile fault code, check the possible causes and inspect the related wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code u1899, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for 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.

The fault code U1899 is related to the communication bus between different modules in the vehicle. The diagnosis involves checking the wiring and connections between the modules.

The estimated repair time for this fault code is 1.0 hour. The fixing cost will depend on the hourly rate charged by the auto repair shop, which is usually between $75 and $150 per hour.

Other factors that may influence the cost include the location of the shop, the type of vehicle, and the severity of the issue.

The U1899 fault code is related to the StarterGenerator Control Module. It indicates that there is a loss of communication between the StarterGenerator Control Module and the Powertrain Control Module.

This fault code is reported on a class 2 link to the scan tool by the Powertrain Control Module. The U1899 code will set when a node alive message has not been received from the StarterGenerator Control Module within the last 5 seconds after establishing class 2 serial data communication. It can also set when a supervised high-speed GMLAN message has not been received.

What are the possible causes of the u1899 automobile fault code?

If you’re experiencing the u1899 fault code, your engine light may be on. This could be due to a faulty Powertrain Control Module (PCM), an open or shorted PCM harness, a poor electrical connection in the PCM circuit, or a faulty Starter/Generator Control Module (SGCM). To fix the issue, check the possible causes listed above and visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the related wiring harness and connectors to fix the u1899 fault code?

If you’re experiencing the u1899 fault code, which is indicated by the engine light being on, you may need to visually inspect the related wiring harness and connectors. This fault code can be caused by a faulty Powertrain Control Module (PCM), an open or shorted Powertrain Control Module harness, a poor electrical connection in the Powertrain Control Module circuit, or a faulty Starter/Generator Control Module (SGCM). To fix the issue, check the possible causes listed above and inspect the wiring harness and connectors for any damage or corrosion. Look for broken, bent, pushed out, or corroded connector pins.

Is a faulty Starter/Generator Control Module (SGCM) a common cause of the u1899 fault code?

The u1899 fault code, indicated by the engine light or service engine soon warning light, may be caused by a faulty Starter/Generator Control Module (SGCM). Other possible causes include a faulty Powertrain Control Module (PCM), open or shorted PCM harness, or poor electrical connection. To fix the issue, inspect the wiring harness and connectors for damage or corrosion and check for broken or bent pins.

u1899 error fault code explained

If your engine light is on, it could be due to a faulty Powertrain Control Module (PCM), an open or shorted PCM harness, a poor electrical connection in the PCM circuit, or a faulty StarterGenerator Control Module (SGCM). Visually inspect the wiring harness and connectors for damage, broken, bent, pushed out, or corroded pins.

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