[SOLVED] P16Bb Code: Low Voltage In Alternator ‘b’ Terminal Circuit – Fix Now!

The automobile fault code P16BB indicates a problem with the alternator. The most common symptom is the engine light being illuminated or the service engine soon warning light appearing.

The cause of this fault code can be a faulty alternator, an open or shorted alternator harness, or a poor electrical connection in the alternator circuit. To fix this issue, it is recommended to visually inspect the wiring harness and connectors, checking for any damaged components or broken, bent, pushed out, or corroded connector pins. The repair time for this problem is estimated to be around 1.0 hour.

To interpret the fault code, it is important to check the “Possible Causes” listed above and perform the necessary inspections and repairs.

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

When the p16bb fault code appears, you may notice the Engine Light ON or the Service Engine Soon Warning Light illuminated.

  • The symptoms of the automobile fault code p16bb include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p16bb can be caused by a faulty alternator, an open or shorted alternator harness, or a poor electrical connection in the alternator circuit.

  • The fault code P16BB can be caused by a faulty alternator, an open or shorted alternator harness, or a poor electrical connection in the alternator circuit.

To fix the automobile fault code p16bb, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p16bb, follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p16bb are the estimated repair time of 1.0 hour and the typical auto repair shop charges of $75 to $150 per hour.

The P16BB fault code refers to a problem with the alternator ‘B’ terminal circuit’s low voltage. The alternator is responsible for generating electricity to power the electrical system and charge the battery.

The alternator control mode, controlled by the Powertrain Control Module (PCM), ensures the alternator maintains voltage target values of 14.5 V and 12.5 V. The PCM receives the alternator output signal, which varies based on factors such as battery charge, electrical load, and engine speed. When the engine speed reaches a specified value and the IGP terminal voltage falls below a set value while the alternator is in the 14.5 V mode, and this condition persists for a specific duration with the alternator power generation within the set range, the PCM detects a malfunction.

This triggers the P16BB fault code, indicating a problem with the alternator ‘B’ terminal circuit’s low voltage. It is important to address this issue promptly to ensure proper functioning of the electrical system and battery charging.

What are the possible causes for the automobile fault code P16BB?

If you see the engine light or service engine soon warning light on, the fault code P16BB could be the culprit. This code is often caused by a faulty alternator or issues with the alternator harness, such as an open or shorted circuit. To fix the problem, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded connector pins. Taking these steps can help you resolve the issue and get your car back on the road.

How can I visually inspect the wiring harness and connectors to fix the P16BB fault code?

To fix the P16BB fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check if the connector’s pins are broken, bent, pushed out, or corroded. This can help identify any issues with the alternator harness, such as an open or shorted circuit or poor electrical connection. Don’t forget to check the “Possible Causes” listed above for further troubleshooting.

What should I look for when checking for damaged components and connector’s pins to resolve the P16BB fault code?

When resolving the P16BB fault code, start by checking for damaged components and connector’s pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. This can help identify if the alternator harness is open or shorted, or if there is a poor electrical connection in the alternator circuit. By addressing these issues, you can resolve the symptom of the engine light being on and ensure proper functioning of the alternator.

p16bb error fault code explained

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be due to a faulty alternator, an open or shorted alternator harness, or a poor electrical connection in the alternator circuit.

To fix this, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

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