AutoCodes – Honda – P16BC Honda

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

Quick Answer

The alternator is driven by the engine and generates electricity to supply the necessary power to the electrical load and to charge the battery. Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator circuit poor electrical connection. 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 Honda indicates Alternator FR Terminal Circuit/IGP Circuit Low Voltage.
Common causes: Common causes include Faulty Alternator, Alternator harness is open or shorted, Alternator circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 17,226

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P16BC Honda Description

The alternator is driven by the engine and generates electricity to supply the necessary power to the electrical load and to charge the battery. The alternator voltage target values of 14.5 V and 12.5 V are achieved by switching the alternator control mode (controlled by the Powertrain Control Module (PCM)). The alternator output signal is sent to the PCM, and it varies according to the batteryís state of charge, the electrical load, and the engine speed.
When the engine speed is a specified value and the IGP terminal voltage is below a set value when the alternator is in the 14.5 V mode, and the alternator power generation amount is a set range or less, and this condition continues more than a set time, the PCM detects a malfunction and a Diagnostic Trouble Code (DTC) is stored.

OBDII Code P16BC Honda - Alternator FR Terminal Circuit/IGP Circuit Low Voltage - AutoCodes.com — P16BC Honda Code - Alternator FR Terminal Circuit/IGP Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P16BC Honda?

Faulty Alternator
Alternator harness is open or shorted
Alternator circuit poor electrical connection

How to Fix the DTC P16BC Honda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16BC Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P16BC Honda code?

Need more information on how to fix the P16BC Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16BC Honda code diagnosed by a professional: Find a repair shop in your area

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.