Honda Maintenance Minder Codes Explained

Enter the code your Honda is showing and see exactly what Honda says it includes.

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Pick your vehicle and enter your mileage. The full schedule is listed further down this page.

Honda Maintenance Minder codes

Honda's Maintenance Minder replaces the printed mileage table. It watches how the engine is used, estimates the remaining oil life and shows a code on the dash when service is due. The table below is Honda's own list of codes.

Code	What it covers
A	Replace engine oil
B	Replace engine oil and oil filter Inspect front and rear brakes Inspect tie rod ends, steering gearbox and boots Inspect suspension components Inspect driveshaft boots Inspect brake hoses and lines (including ABS/VSA) Inspect all fluid levels and condition of fluids Inspect exhaust system Inspect fuel lines and connections
1	Rotate tires
2	Replace air cleaner element Replace dust and pollen filter Inspect drive belt
3	Replace transmission fluid
4	Replace spark plugs Inspect valve clearance
5	Replace engine coolant
6	Replace rear differential fluid
7	Replace brake fluid

If a Maintenance Minder message does not appear more than 12 months after the display is reset, change the engine oil every year.
If you drive in dusty conditions, replace the air cleaner element every 15,000 miles (24,000 km).
If you drive primarily in urban areas with high concentrations of soot in the air from industry and diesel-powered vehicles, replace the dust and pollen filter every 15,000 miles (24,000 km).
Driving in mountainous areas at very low vehicle speeds results in higher transmission temperatures. If you regularly drive your vehicle under these conditions, have the transmission fluid changed every 25,000 miles (40,000 km).
Applies to models with a rear differential (AWD); check your owner's manual for your trim.
If a Maintenance Minder indicator does not appear more than 36 months after the display for item 7 is reset, change the brake fluid every 3 years.

A dash code combines a letter with digits: B12 means main item B plus sub items 1 and 2.

How to read a code like B12

Read the first character as the main item and every digit after it as a sub item. So B12 is main item B (oil and filter with the inspection list) plus sub item 1 (rotate tires) plus sub item 2 (air cleaner, dust and pollen filter, drive belt). A1 is an oil change plus a tire rotation.

When the message appears

Message	Oil life	What it means
Maintenance Due Soon	15% to 6%	The engine oil is approaching the end of its service life; the listed items should be inspected and serviced soon.
Maintenance Due Now	5% to 1%	The oil has almost reached the end of its service life; service the listed items as soon as possible.
Maintenance Past Due	0%, negative distance shown	The oil life has passed. A negative distance appears after driving over 10 miles (U.S. models) and blinks. The listed items must be inspected and serviced immediately.

Look up a code

Honda models with their own page

Honda CR-V and Honda Accord, or all Honda schedules.

Sources

This page is a reference, not a substitute for your owner's manual. Data last checked 2026-09-20.

Frequently asked questions

What do Honda Maintenance Minder codes mean?

A code is a main item letter (A or B) plus sub item digits. A replaces the engine oil. B replaces the oil and filter and adds inspections. The digits add a tire rotation (1), air cleaner, dust and pollen filter and drive belt inspection (2), transmission fluid (3), spark plugs and valve clearance (4), engine coolant (5), rear differential fluid where fitted (6) and brake fluid (7).

What does Honda B12 service mean?

B12 is main item B plus sub items 1 and 2: replace the engine oil and oil filter, inspect the front and rear brakes and the other items on the B list, rotate the tires, replace the air cleaner element and the dust and pollen filter, and inspect the drive belt.

What is the difference between code A and code B?

Code A is an oil change only. Code B is an oil and filter change plus an inspection list covering brakes, tie rod ends, steering gearbox and boots, suspension, driveshaft boots, brake hoses and lines, fluid levels, exhaust and fuel lines.

When does the Maintenance Minder show a code?

The items appear when remaining engine oil life drops to 15% (Due Soon). At 5% to 1% the message is Due Now, and after driving more than 10 miles past zero a blinking negative distance shows and the message is Past Due.

Can I still change the oil every year?

Honda says that if no Minder message appears more than 12 months after the display was reset, change the engine oil every year.

How often is brake fluid changed on a Honda?

Sub item 7 replaces brake fluid. Honda says that if no indicator for item 7 appears more than 36 months after that display was reset, change the brake fluid every 3 years.

Does the code list differ between Honda models?

Slightly. The 2024 CR-V guide lists sub item 6 (rear differential fluid) and the 2022 Accord guide does not. The main items and sub items 1 to 5 and 7 match in both.