[SOLVED] Fixing U1511: Left Headlamp Communication Lost With Control Module

The automobile fault code U1511 indicates a problem with the left headlamp circuit, which can trigger the engine light or service engine soon warning light. The possible causes of this fault code include a faulty left headlamp, an open or shorted left headlamp harness, poor electrical connection in the left headlamp circuit, or a faulty headlamp control moduleheadlamp leveling control module. To fix this issue, one 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.

The repair time for this issue is estimated to be 1.0.

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 u1511 fault code. Here are the symptoms to look out for:

  • The U1511 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 problems with the speedometer, such as it not working or displaying incorrect information.
  • Additionally, the vehicle’s ABS system may not function properly, and the traction control system may be disabled.
  • Finally, the vehicle may experience issues with the power steering, such as difficulty turning or a loss of power assistance.

The automobile fault code u1511 can be caused by a faulty left headlamp, open or shorted left headlamp harness, poor electrical connection in the left headlamp circuit, or a faulty headlamp control module.

  • The automobile fault code U1511 can be caused by a faulty left headlamp, an open or shorted left headlamp harness, a poor electrical connection in the left headlamp circuit, or a faulty headlamp control module or headlamp leveling control module.

Below are some possible fixes for the automobile fault code u1511, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u1511, 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 automobile fault code U1511 can be diagnosed and fixed within an estimated repair time of 1.0 hour.

The cost of repair is influenced by the hourly rate charged by the auto repair shop, which typically ranges between $75 and $150 per hour.

Therefore, the total cost of fixing the U1511 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The U1511 code is related to the Local Interconnect Network (LIN) Bus in automobiles.

LIN Bus is a single wire transmission system with a rate of 10.417 Kbits.

The code is set when the Headlamp Control ModuleHeadlamp Leveling Control Module loses communication with the Left Headlamp on the LIN Bus.

This results in a no communication code being set against the non-communicating LIN device. The U1511 code is a Diagnostic Trouble Code (DTC) that indicates a problem with the LIN network communication.

What are the possible causes of the u1511 fault code?

If you’re experiencing the u1511 fault code, your engine light may be on. This could be due to a faulty left headlamp, an open or shorted left headlamp harness, a poor electrical connection in the left headlamp circuit, or a faulty headlamp control module/headlamp leveling control module. 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’s pins.

How can I visually inspect the wiring harness and connectors related to the u1511 fault code?

If you’re experiencing the u1511 fault code, which is indicated by the engine light being on, you can visually inspect the wiring harness and connectors related to the issue. This fault code can be caused by a faulty left headlamp, an open or shorted left headlamp harness, a poor electrical connection in the left headlamp circuit, or a faulty headlamp control module/headlamp leveling control module. To fix the issue, check the possible causes listed above and visually inspect the related wiring harness and connectors for any damaged components or broken, bent, pushed out, or corroded connector pins.

What are the steps to take if I find damaged components or broken, bent, pushed out, or corroded connector’s pins related to the u1511 fault code?

If you encounter the u1511 fault code, which causes the engine light to turn on, you should first check for a faulty left headlamp, an open or shorted left headlamp harness, a poor electrical connection in the left headlamp circuit, or a faulty headlamp control module/headlamp leveling control module. To fix the issue, visually inspect the related wiring harness and connectors, and check for damaged components or broken, bent, pushed out, or corroded connector’s pins.

u1511 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to a faulty Left Headlamp, Left Headlamp harness, or Headlamp Control Module.

Check the wiring harness and connectors for damage, and inspect the connector’s pins for any issues.

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