[SOLVED] Fixing U1893 Code: Hybrid Control Module Communication Lost

If you see the engine light on or the service engine soon warning light, it could be due to the automobile fault code U1893. This code indicates a problem with the Powertrain Control Module (PCM) or the Hybrid Control Module (HCM).

The cause could be a faulty PCM, an open or shorted PCM harness, a poor electrical connection in the PCM circuit, or a faulty HCM. The importance of repairing this issue lies in the fact that it can affect the performance of your vehicle.

The repair difficulty is moderate, and it takes about 1.0 hour to fix.

To interpret the fault code, you need to check the possible causes listed above and visually inspect the related wiring harness and connectors.

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 due to the u1893 fault code. Here are the symptoms to look out for:

  • The fault code U1893 is associated with several symptoms that indicate a problem with the communication circuit of the engine control module.
  • These symptoms include the engine light turning on or the service engine soon warning light illuminating.
  • Other symptoms include issues with the transmission, such as difficulty shifting gears or the transmission slipping.
  • Additionally, the vehicle may experience a decrease in fuel efficiency, reduced power, or stalling.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The automobile fault code u1893 can be caused by a faulty PCM, open or shorted harness, poor electrical connection, or a faulty HCM.

  • The automobile fault code U1893 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 possible cause is a poor electrical connection in the Powertrain Control Module circuit.
  • Lastly, a faulty Hybrid Control Module (HCM) can also trigger the U1893 fault code.

To fix the u1893 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 u1893, 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.

The fault code U1893 is a communication error between the engine control module and the instrument cluster. The estimated repair time for this fault code is 1.0 hour.

The cost of fixing this fault code is influenced by the hourly rate charged by the auto repair shop. Most auto repair shops charge between $75 and $150 per hour. Therefore, the fixing cost of the U1893 fault code can range from $75 to $150.

The U1893 code is related to the Hybrid Control Module and Powertrain Control Module communication.

This fault code is set when the Hybrid Control Module fails to receive a node alive message from the Powertrain Control Module within 5 seconds of establishing class 2 serial data communication. It can also be set when a supervised high-speed GMLAN message is not received. The U1893 code is reported on a class 2 link to the scan tool by the Powertrain Control Module, even if it is set by a different module.

What are the possible causes of the u1893 automobile fault code?

If you’re experiencing the u1893 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 Hybrid Control Module (HCM). 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 one visually inspect the related wiring harness and connectors to fix the u1893 fault code?

If you’re experiencing the u1893 fault code, which is indicated by the engine light being on or the service engine soon warning light, there are a few possible causes. These include 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 Hybrid Control Module (HCM). To fix the issue, start by visually inspecting the related wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.

Is a faulty Hybrid Control Module (HCM) a common cause of the u1893 fault code?

The u1893 fault code, indicated by the engine light or service engine soon warning light, may be caused by a faulty Hybrid Control Module (HCM), among other possible causes such as a faulty Powertrain Control Module (PCM) or poor electrical connection. To fix the issue, one should visually inspect the related wiring harness and connectors, checking for damaged components and broken, bent, pushed out, or corroded connector’s pins.

u1893 error fault code explained

If the 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 Hybrid Control Module (HCM). Visually inspect the wiring harness and connectors for damage and check for broken, bent, pushed out, or corroded connector pins.

Scroll to Top