The automobile fault code U1149 indicates a problem with the Left Multifunction Switch in your vehicle. The most common symptom is the Engine Light turning on, which should not be ignored. The cause of this fault code could be a faulty switch, an open or shorted harness, or a poor electrical connection.

It is important to visually inspect the wiring harness and connectors for any damage or corrosion. The repair time for this fault code is estimated to be around 1.0 hour. To interpret the fault code, you should check the “Possible Causes” listed above and follow the recommended fix.

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, it could be a sign of the u1149 fault code. Here are some symptoms to look out for:

  • The U1149 fault code in an automobile can cause the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON, communication issues between modules, problems with the ABS system, issues with the transmission, problems with the powertrain control module, and issues with the body control module.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The automobile fault code u1149 can be caused by a faulty left multifunction switch, an open or shorted harness, or poor electrical connection.

  • The automobile fault code U1149 can be caused by a faulty left multifunction switch.
  • It can also be caused by an open or shorted left multifunction switch harness.
  • Additionally, a poor electrical connection in the left multifunction switch circuit can also trigger this fault code.

Below are the possible fixes for the automobile fault code u1149, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u1149, 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 U1149 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 U1149 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The U1149 code is an OBDII fault code that indicates a communication problem between the Powertrain Control Module (PCM) and the Multi-Function Switch.

The PCM monitors the Multi-Function Switch and sets the U1149 code when it detects that the switch is not functioning according to factory specifications. The U1149 code can also be set when the Cluster does not receive any LIN Bus messages from the Left Multifunction Switch.

This code is commonly referred to as “Lost Communication With Multi-Function Switch.

What are the possible causes of the u1149 automobile fault code?

If your engine light is on and you’re seeing the u1149 fault code, it could be due to a faulty left multifunction switch, an open or shorted harness, or poor electrical connection in the switch 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.

How can I visually inspect the wiring harness and connectors related to the Left Multifunction Switch?

If you’re experiencing an Engine Light ON (or Service Engine Soon Warning Light) due to a faulty Left Multifunction Switch, you can visually inspect the related wiring harness and connectors to fix the issue. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. This will help you identify if the Left Multifunction Switch harness is open or shorted, or if there is a poor electrical connection in the Left Multifunction Switch circuit.

What should I do if I find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection for the u1149 fault code?

If you find damaged components or broken, bent, pushed out, or corroded connector’s pins during the inspection for the u1149 fault code, you should replace or repair them as necessary. This will help to ensure that the Left Multifunction Switch circuit has a good electrical connection and that the engine light or service engine soon warning light is turned off. Remember to visually inspect the related wiring harness and connectors as well to identify any other potential issues.

u1149 error fault code explained

If your engine light is on and the code is u1149, check the left multifunction switch and its wiring harness for faults. Visually inspect the wiring and connectors for damage, and look for broken, bent, pushed out, or corroded pins.

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