The automobile fault code U1021 indicates a problem with the Anti-Lock Brake System (ABS) Control Module or its related components. The most common symptom is the illumination of the Engine Light or Service Engine Soon Warning Light.

The cause of this fault code could be a faulty ABS Control Module, an open or shorted ABS Control Module harness, a poor electrical connection in the ABS Control Module circuit, or a faulty Powertrain Control Module (PCM).

The importance of repairing this issue lies in the fact that it affects the vehicle’s braking system. The repair difficulty is moderate, and the fix involves visually inspecting the wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector’s pins.

The repair time is estimated to be around 1.0 hour. To interpret the fault code, one needs 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, it could be due to the u1021 fault code. Here are some symptoms to look out for:

  • The automobile fault code U1021 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON.

The automobile fault code u1021 can be caused by a faulty ABS control module, open or shorted ABS control module harness, poor electrical connection in the ABS control module circuit, or a faulty PCM.

  • The automobile fault code u1021 can be caused by a faulty Anti-Lock Brake System (ABS) Control Module.
  • It can also be caused by an open or shorted Anti-Lock Brake System Control Module harness.
  • Another cause can be a poor electrical connection in the Anti-Lock Brake System Control Module circuit.
  • Lastly, a faulty Powertrain Control Module (PCM) can also trigger the u1021 fault code.

To fix the u1021 automobile fault code, check the possible causes and inspect the wiring harness, connectors, and components for damage.

  • To fix the automobile fault code u1021, you need to check the possible causes listed above.
  • Visually inspect the related wiring harness and connectors.
  • Look for damaged components and broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The fault code U1021 is related to the communication circuit of the vehicle’s network.

The diagnosis of this code requires specialized equipment and expertise. The estimated repair time for this fault code is 1.0 hour. The cost of fixing this fault code varies depending on the hourly rate of the auto repair shop.

Most auto repair shops charge between $75 and $150 per hour. Therefore, the cost of fixing the U1021 fault code can range from $75 to $150.

The u1021 fault code is a Diagnostic Trouble Code (DTC) that sets in the Powertrain Control Module (PCM). This happens when data messages received from the Anti-Lock Brake System (ABS) Control Module over the HS-CAN2 is missing.

The code indicates that there is a lost communication with the Anti-Lock Brake System Control Module. This fault code can cause issues with the ABS system, such as the ABS warning light turning on or the ABS system not functioning properly. It is important to have this issue diagnosed and repaired by a qualified mechanic to ensure safe driving.

What are the possible causes of the u1021 automobile fault code?

If you’re experiencing the u1021 fault code, your engine light may be on. This could be due to a faulty Anti-Lock Brake System (ABS) Control Module, an open or shorted ABS Control Module harness, a poor electrical connection in the ABS Control Module circuit, or a faulty Powertrain Control Module (PCM). To fix the issue, check the possible causes listed above, visually inspect the related wiring harness and connectors, and look for damaged components or corroded connector pins.

How can the Anti-Lock Brake System Control Module harness be checked for faults?

If the engine light is on and the Anti-Lock Brake System (ABS) Control Module is suspected to be faulty, the module harness should be checked for faults. This can be done by visually inspecting the related wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector’s pins. Additionally, the possible causes listed above should be checked to ensure that the issue is properly diagnosed and fixed.

What steps should be taken to fix the u1021 automobile fault code?

If you’re experiencing the u1021 fault code, your engine light may be on. This could be due to a faulty Anti-Lock Brake System (ABS) Control Module, an open or shorted ABS Control Module harness, a poor electrical connection in the ABS Control Module circuit, or a faulty Powertrain Control Module (PCM). To fix the issue, visually inspect the wiring harness and connectors, checking for damaged components and broken, bent, pushed out, or corroded connector pins.

u1021 error fault code explained

If your engine light is on, it could be due to a faulty ABS control module, open or shorted harness, poor electrical connection, or a faulty PCM. Check the possible causes, inspect wiring and connectors, and look for damaged components or corroded pins.

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