[SOLVED] U1858 Code: Hybrid/Ev Powertrain Communication Lost – Fix Now!

The automobile fault code U1858 indicates a problem with the HybridEV Powertrain Control Module.

The most common symptom is the Engine Light ON or Service Engine Soon Warning Light. The cause of this fault code could be a faulty HybridEV Powertrain Control Module, an open or shorted harness, or a poor electrical connection. It is important to visually inspect the related wiring harness and connectors for any damage or corrosion.

The repair time for this fault code is 1.0, and it is crucial to fix the issue as soon as possible to avoid any further damage to the vehicle. To interpret the fault code, it is recommended to check the “Possible Causes” listed above and follow the suggested fix accordingly.

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 u1858 fault code.

Here are the symptoms to look out for:

  • The automobile fault code U1858 has the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON.

The automobile fault code u1858 can be caused by a faulty control module, open or shorted harness, or poor electrical connection.

  • The automobile fault code U1858 can be caused by a faulty Hybrid/EV Powertrain Control Module.
  • It can also be caused by an open or shorted Hybrid/EV Powertrain Control Module harness.
  • Additionally, a poor electrical connection in the Hybrid/EV Powertrain Control Module circuit can also trigger this fault code.

Below are some possible fixes for the automobile fault code u1858, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u1858, 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 U1858 has an estimated repair time of 1.0 hour. The cost of fixing this fault code is influenced by the repair time. Most auto repair shops charge between $75 and $150 per hour for their services.

Therefore, the fixing cost of U1858 will range between $75 and $150, depending on the repair time required.

The U1858 code is related to the Power Inverter Module in hybrid and electric vehicles. The Drive Motor Control Modules and the HybridEV Powertrain Control Module 1 are internal to the Power Inverter Module.

Communication diagnostics for the serial data are diagnosed from external sources only to the Power Inverter Module connector. The DTC sets when a supervised periodic message that includes the transmitter device availability has not been received. This code indicates that the Electronic Brake Control Module has lost communication with the HybridEV Powertrain Control Module on Chassis Expansion CAN Bus.

What are the possible causes of the u1858 automobile fault code?

If you’re experiencing the u1858 automobile fault code, it’s likely that your engine light is on. This could be due to a faulty Hybrid/EV Powertrain Control Module, an open or shorted harness, or poor electrical connection in the circuit. To fix the issue, it’s recommended to visually inspect the wiring harness and connectors for any damage or corrosion. Check for broken, bent, pushed out, or corroded connector’s pins.

How can the Hybrid/EV Powertrain Control Module harness be checked for faults?

If the engine light is on, it could be due to a faulty Hybrid/EV Powertrain Control Module. To check for faults, inspect the related wiring harness and connectors for any damage or corrosion. Look for broken, bent, or pushed out connector pins. This will help identify if the Hybrid/EV Powertrain Control Module harness is open or shorted, or if there is a poor electrical connection in the circuit.

What steps should be taken to fix the u1858 automobile fault code?

If you’re experiencing the u1858 automobile fault code, the engine light may be on. This could be due to a faulty Hybrid/EV Powertrain Control Module, an open or shorted harness, or poor electrical connection. To fix the issue, visually inspect the wiring harness and connectors, checking for damaged components and broken, bent, pushed out, or corroded connector pins.

u1858 error fault code explained

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

Look for broken, bent, or pushed out pins.

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