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Engine-Codes – Generic – P16BC

P16BC Code - Alternator FR Terminal Circuit/IGP Circuit Low Voltage

Quick Answer

The P16BC diagnostic trouble code refers to the Alternator FR Terminal Circuit/IGP Circuit Low Voltage. Common causes include Faulty alternator, Damaged FR terminal, Issues with the IGP circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P16BC indicates Alternator FR Terminal Circuit/IGP Circuit Low Voltage.
Common causes
Common causes include Faulty alternator, Damaged FR terminal, Issues with the IGP circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P16BC Description

The P16BC diagnostic trouble code refers to the Alternator FR Terminal Circuit/IGP Circuit Low Voltage. This code indicates that there is a problem with the electrical system related to the alternator's FR (Field Relay) terminal or the IGP (Integrated Generator Regulator) circuit. The alternator is responsible for charging the battery and providing power to the electrical components of the vehicle. When the FR terminal or IGP circuit is experiencing low voltage, it can lead to various issues with the vehicle's electrical system and overall performance.

OBDII Code P16BC - Alternator FR Terminal Circuit/IGP Circuit Low Voltage
P16BC Code - Alternator FR Terminal Circuit/IGP Circuit Low Voltage

Common Causes of P16BC

  1. Faulty alternator
  2. Damaged FR terminal
  3. Issues with the IGP circuit
  4. Wiring problems
  5. Battery issues

Symptoms of P16BC

  1. Dimming or flickering lights
  2. Difficulty starting the engine
  3. Battery warning light illuminated on the dashboard
  4. Electrical system malfunctions
  5. Vehicle stalling or loss of power while driving

How to Fix P16BC

  1. Diagnose the problem by using a multimeter to test the voltage output from the alternator, FR terminal, and IGP circuit.
  2. Inspect the wiring connecting the alternator, FR terminal, and IGP circuit for any damage or loose connections.
  3. Replace the alternator if it is found to be faulty.
  4. Repair or replace the FR terminal or IGP circuit if necessary.
  5. Test the vehicle's electrical system to ensure proper functioning after the repair.

Cost to Fix P16BC

The cost of repairing the Alternator FR Terminal Circuit/IGP Circuit Low Voltage issue can vary depending on the specific cause of the problem and the vehicle make and model. On average, the cost of replacing an alternator ranges from $300 to $800, including parts and labor. However, additional costs may be incurred if other components need to be replaced or if there are complex wiring issues. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle.

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Code P16BC Information for Specific Makes

  • P16BC Acura — Alternator FR Terminal Circuit/IGP Circuit Low Voltage
  • P16BC BMW — Throttle Valve Adaptation Lower Stop Not Learned
  • P16BC Buick — Engine Controls Ignition Relay Feedback Circuit 3
  • P16BC Cadillac — Engine Controls Ignition Relay Feedback Circuit 3
  • P16BC Chevrolet — Engine Controls Ignition Relay Feedback Circuit 3
  • P16BC GMC — Engine Controls Ignition Relay Feedback Circuit 3
  • P16BC Honda — Alternator FR Terminal Circuit/IGP Circuit Low Voltage
  • P16BC MINI — Throttle Valve Adaptation Lower Stop Not Learned
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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