[SOLVED] U1838 Code: How To Fix Lost Communication With Battery Charger

The automobile fault code U1838 indicates a problem with the Battery Charger Control Module.

The most common symptom is the Engine Light turning on.

The cause of this issue could be a faulty Battery Charger Control Module, an open or shorted harness, or a poor electrical connection. It is important to address this issue promptly as it can lead to further damage to the vehicle’s electrical system. The repair difficulty is moderate, and the fix involves visually inspecting the wiring harness and connectors for any damage or corrosion.

The repair time is estimated to be around 1.0 hour.

To interpret the fault code, one must use an OBD-II scanner or code reader.

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 u1838 fault code. Here are the symptoms to look out for:

  • The automobile fault code U1838 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON.

The automobile fault code u1838 can be caused by a faulty Battery Charger Control Module, open or shorted harness, or poor electrical connection.

  • The automobile fault code U1838 can be caused by a faulty Battery Charger Control Module.
  • It can also be caused by an open or shorted harness of the Battery Charger Control Module.
  • Additionally, a poor electrical connection in the circuit of the Battery Charger Control Module can also trigger this fault code.

To fix the automobile fault code u1838, check the possible causes and inspect related wiring harness and connectors for damage.

  • To fix the automobile fault code u1838, 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 automobile fault code U1838 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops. Therefore, the total cost of fixing the U1838 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The U1838 code indicates a loss of communication with the battery charger control module on the high voltage energy management CAN bus. The serial data circuit is used by devices in the vehicle to communicate with each other.

When a device stops communicating on the serial data circuit, the state of health message it normally sends disappears. Other devices on the serial data circuit detect the absence of the state of health message and set a DTC associated with the loss of the state of health of the non-communicating device.

The U1838 code sets when a supervised periodic message that includes the transmitter device availability has not been received.

What are the possible causes of the u1838 automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the u1838 fault code. This code is caused by a faulty battery charger control module, an open or shorted harness, or poor electrical connection in the module 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’s pins.

How can one visually inspect the related wiring harness and connectors to fix the u1838 fault code?

If you’re experiencing the u1838 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, which include a faulty Battery Charger Control Module, an open or shorted harness, or a poor electrical connection. 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.

What are the signs that the Battery Charger Control Module harness is open or shorted, causing the u1838 fault code?

If the engine light or service engine soon warning light is on, it could be due to a faulty Battery Charger Control Module or an open or shorted Battery Charger Control Module harness. The cause could also be a poor electrical connection in the Battery Charger Control Module circuit. To fix this issue, 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.

u1838 error fault code explained

If your engine light is on, it could be due to a faulty Battery Charger Control Module or poor electrical connection. Check the wiring harness and connectors for damage or corrosion.

Look for broken, bent, or pushed out pins. Take action to fix the issue.

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