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What is the code B 1 2 3 on a Honda Civic?

The code "B 1 2 3" on a Honda Civic is a diagnostic trouble code (DTC) that indicates a specific issue with the vehicle's engine or emissions system. This code is part of the On-Board Diagnostics (OBD) system, which is a standardized system used by automakers to monitor and report on a vehicle's performance and identify any problems.


What Does the B 1 2 3 Code Mean?


The "B 1 2 3" code on a Honda Civic is a generic OBD-II code that indicates a problem with the vehicle's battery or charging system. Specifically, this code is associated with the following issues:



  • B - Battery or Charging System

  • 1 - Battery voltage is too high

  • 2 - Battery voltage is too low

  • 3 - Charging system voltage is too high


When this code is triggered, it means that the vehicle's battery or charging system is not functioning properly, which can lead to a variety of issues, such as the battery not charging correctly, the engine not starting, or electrical components not working as intended.


Diagnosing and Fixing the B 1 2 3 Code


To diagnose and fix the B 1 2 3 code on a Honda Civic, you'll need to use a diagnostic tool to scan the vehicle's computer for any additional codes that may provide more information about the specific issue. From there, you can take the following steps:



  • Check the battery voltage and condition: Use a multimeter to measure the battery voltage, which should be between 12.4 and 12.6 volts when the engine is off. If the voltage is outside of this range, the battery may need to be replaced.

  • Inspect the alternator and charging system: The alternator is responsible for charging the battery and powering the vehicle's electrical system. If the alternator is not functioning properly, it can cause the battery voltage to be too high or too low.

  • Check for loose or damaged wiring: Inspect the wiring harness and connections between the battery, alternator, and other electrical components for any signs of damage or loose connections.

  • Replace any faulty components: If the battery or alternator is found to be defective, they will need to be replaced to resolve the B 1 2 3 code.


Once the underlying issue has been identified and addressed, the B 1 2 3 code should be cleared, and the vehicle's battery and charging system should be functioning properly again.

What does b 1/2 mean in a Honda Civic?


B12 codes indicate that your Honda needs an engine oil and filter change along with a tire rotation and replacement of both the engine air filter and cabin air filter.



What is the code B3 on a Honda Civic?


If you are seeing it on the odometer display, this is a maintenance reminder code B3. This is telling you its time for an oil change and the transmission fluid replacement. You can find this information in the maintenance booklet that should have come with your owners manual or in the owners manual itself.



What is the service B3?


Key components of this service involve oil and filter change, brake inspection, and tire inflation check and correction. Additionally, Service B3 may cover the replacement of spark plugs, the inspection of the vehicle's fluid levels, and a thorough examination of the engine compartment for any potential issues.



What does B17 mean on a Honda Civic?


Main Honda Service Codes

CodeWhat it Means
A12It may be necessary to change the engine air filter, change the oil, or rotate the tires
B17It may be necessary to oil change, tire rotation, and brake fluid replacement



What is Honda service code B-1-2-3?


B-1-2-3 Service – Oil and oil filter change, tire rotation, tire pressure check required, air cleaner element replacement, drive belt check, dust and pollen filter replacement, and transmission fluid and transfer fluid replacement (if equipped) required.



What is b 1 2 3 service Honda?


B-1-2-3 Service – Oil and oil filter change, tire rotation, tire pressure check required, air cleaner element replacement, drive belt check, dust and pollen filter replacement, and transmission fluid and transfer fluid replacement (if equipped) required.



What is a B-17 engine?


The Boeing B-17G "Flying Fortress"
The B-17G is powered by four 1,200-horsepower Wright Cyclone Model R-1820-97 engines. These engines are nine cylinder, radial, air-cooled type with a 16:9 gear ratio. The propellers are three-bladed Hamilton Standard propellers, 11 feet, 7 inches in diameter.



What is D1 D2 D3 in Honda Civic?


What do automatic cars' D1, D2, and D3 gears signify? D1, D2, and D3 gears are used when you don't want to apply the brake, such as when going downhill or approaching red lights. Use D1 when a strong gear is needed to get your automobile out of rugged terrains, such as mud or sand.



How much is a B17 service for a Honda?


around $200
Service B17 in your Honda CRV consists of a major vehicle inspection, engine oil change, rotating the tires, and flushing the brake fluid. the cost for this can cost around $200 at most Honda dealers and repair facilities.



What is B 1 2 3 maintenance code Honda Civic?


B-1-2-3 Service – Oil and oil filter change, tire rotation, tire pressure check required, air cleaner element replacement, drive belt check, dust and pollen filter replacement, and transmission fluid and transfer fluid replacement (if equipped) required.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.