The P1B21 automobile fault code indicates a problem with the HybridElectric Vehicle Battery Pack or the HybridElectric Vehicle Battery Interface Control Module. The most common symptom is the Engine Light turning on.

It is crucial to address this issue promptly as it can lead to further damage to the vehicle. The repair difficulty is moderate, and the repair time is estimated at 1.0 hour. To fix the issue, one must visually inspect the wiring harness and connectors for any damage or corrosion.

It is also recommended to check for broken, bent, or pushed out connector pins.

It is essential to interpret the fault code accurately to ensure the correct repair is performed.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to the p1b21 fault code.

Here are the symptoms to look out for:

  • The P1B21 fault code in an automobile can cause the following symptoms: Engine Light ON, Service Engine Soon Warning Light ON.

P1B21 fault code can be caused by a faulty battery pack or battery interface control module in hybridelectric vehicles.

  • The automobile fault code P1B21 can be caused by a faulty Hybrid/Electric Vehicle Battery Pack.
  • It can also be caused by a faulty Hybrid/Electric Vehicle Battery Interface Control Module.
  • These are the only two causes of this particular fault code.

Below are some possible fixes for the automobile fault code p1b21, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p1b21, 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 factors that influence the cost of fixing the P1B21 automobile fault code based on the estimated repair time of 1.0 hour are: – The hourly rate charged by the auto repair shop, which can range from $75 to $150 per hour. – The severity of the issue causing the fault code, which can impact the complexity of the repair and the parts needed. – The make and model of the vehicle, as some cars may require more specialized parts or expertise to fix. – The location of the repair shop, as labor rates can vary by region or city. – The warranty or insurance coverage on the vehicle, which may impact the out-of-pocket cost for the repair.

The P1B21 code refers to a fault in the HybridElectric Vehicle battery pack. The battery pack contains 288 cells grouped in parallel. There are three battery sections, each with a different number of cells.

The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybridEV battery interface control modules.

The battery energy control module will determine when a fault condition is present and communicate it to the hybridEV powertrain control module 2. The P1B21 code specifically indicates a high voltage issue in the 30th circuit of the battery.

What are the possible causes of the P1B21 automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the P1B21 fault code. This code is usually caused by a faulty hybrid/electric vehicle battery pack or a faulty hybrid/electric vehicle battery interface control module. To fix this issue, you 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.

How can one visually inspect the related wiring harness and connectors to fix the P1B21 fault code?

If you’re experiencing the P1B21 fault code, which is indicated by the Engine Light ON or Service Engine Soon Warning Light, you may have a faulty Hybrid/Electric Vehicle Battery Pack or a faulty Hybrid/Electric Vehicle Battery Interface Control Module. To fix this issue, you 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. This will help you identify any issues and determine the best course of action to take.

What are the consequences of ignoring the P1B21 fault code and not fixing it in time?

Ignoring the P1B21 fault code, which indicates a faulty hybrid/electric vehicle battery pack or interface control module, can lead to serious consequences. The engine light or service engine soon warning light will remain on, indicating a problem with the vehicle’s battery system. This can result in reduced fuel efficiency, decreased power, and even complete failure of the battery system. It is important to address the issue promptly by visually inspecting the wiring harness and connectors and checking for damaged components.

p1b21 error fault code explained

If your engine light is on, it could be due to a faulty hybridelectric vehicle battery pack or interface control module. Check the possible causes, inspect wiring and connectors, and look for damaged components or corroded pins.

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