The automobile fault code U1128 indicates a problem with the radio circuit, which can cause the engine light to turn on. The possible causes of this fault code include a faulty radio, an open or shorted radio harness, or a poor electrical connection in the radio circuit. To fix this issue, one should visually inspect the wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector pins.

The repair time for this fault code is estimated to be 1.0. It is important to address this issue promptly to avoid further damage to the vehicle’s electrical system.

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 u1128 fault code. Here are the symptoms to look out for:

  • The automobile fault code u1128 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light.

The automobile fault code u1128 can be caused by a faulty radio, open or shorted radio harness, or poor electrical connection in the radio circuit.

  • The automobile fault code u1128 can be caused by a faulty radio.
  • It can also be caused by an open or shorted radio harness.
  • Additionally, a poor electrical connection in the radio circuit can also trigger this fault code.

Below are the possible fixes for the automobile fault code u1128, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u1128, 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 U1128 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 U1128 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The U1128 fault code is related to the class 2 serial data circuit in automobiles. Modules in the circuit monitor for serial data communications during normal vehicle operation. When a module doesn’t receive a message for a critical operating parameter, it records the identification number of the module which sent the message for the state of health monitoring.

If no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1128 is set. This code indicates that there is a lost communication with the Ra module.

What are the possible causes of the u1128 automobile fault code that triggers the engine light or service engine soon warning light?

If you see the engine light or service engine soon warning light on your dashboard, it could be due to a u1128 fault code. This code is often caused by a faulty radio, an open or shorted radio harness, or a poor electrical connection in the radio circuit. To fix the 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 fix the u1128 automobile fault code?

If you’re experiencing the u1128 automobile fault code, you may notice that your engine light is on. This could be due to a faulty radio, an open or shorted radio harness, or a poor electrical connection in the radio circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. It’s important to address these issues promptly to prevent further damage to your vehicle.

What steps should be taken to visually inspect the related wiring harness and connectors when troubleshooting the u1128 automobile fault code?

To troubleshoot the u1128 automobile fault code, start by checking the engine light or service engine soon warning light. The possible causes include a faulty radio, open or shorted radio harness, or poor electrical connection in the radio circuit. To fix the issue, visually inspect the related wiring harness and connectors for any damaged components, broken, bent, pushed out, or corroded connector’s pins.

u1128 error fault code explained

If your engine light is on due to a faulty radio, check the wiring harness and connectors for any damage or corrosion. Look for broken, bent, or pushed out pins. Visually inspect the components and connections to fix the issue.

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