Honda Passport Maintenance Codes: Complete Maintenance Minder Guide

If a letter and one or more numbers suddenly appear on your Honda Passport dashboard, there is usually no reason to panic. In most cases, you are looking at the Honda Passport Maintenance Minder system, which tells us what maintenance the SUV needs based on operating conditions, mileage, engine oil life, and other factors.

Honda Passport maintenance codes can look confusing at first. You might see A1, B1, B12, B13, B16, B17, or another combination. Fortunately, once we understand what the letters and numbers represent, decoding them becomes surprisingly simple.

In this guide, we explain the Honda Passport maintenance codes and meanings, what each Maintenance Minder number requires, when maintenance becomes due, and what we should do when one of these codes appears.

Honda Passport Maintenance Codes at a Glance

For U.S.-market Honda Passport models, the Maintenance Minder system uses two main letters—A and B—plus numbered subcodes.

Honda's current 2026 Passport manual uses these U.S. Maintenance Minder codes. Earlier Passport manuals use essentially the same structure, although there can be small model-year differences in individual inspection requirements.

What Is the Honda Passport Maintenance Minder?

The Maintenance Minder is Honda's built-in maintenance monitoring system.

Rather than relying exclusively on a traditional fixed mileage schedule, the vehicle calculates remaining engine oil life according to operating conditions.

The Passport displays the remaining oil life as a percentage and eventually shows the maintenance items that should be completed.

For the 2026 Honda Passport, Honda states that Maintenance Minder notifications begin appearing when engine oil life falls below 15%.

This means our actual maintenance timing can vary depending on factors such as:

• Driving frequency
• Engine operating conditions
• Short versus long trips
• Temperature
• Towing
• Stop-and-go traffic
• Vehicle usage
• Driving environment

Instead of assuming every Passport needs exactly the same service at the same mileage, Maintenance Minder attempts to tailor the schedule to how the vehicle is actually being used.

How Honda Passport Maintenance Codes Work

The system separates maintenance requirements into main items and sub-items.

The letter is the main service.

The number identifies additional maintenance.

For example:

A1

means:

• A = engine oil replacement
• 1 = tire rotation

Meanwhile:

B16

means:

• B = oil and filter service plus inspections
• 1 = tire rotation
• 6 = rear differential fluid replacement

The numbers are not mileage indicators.

Therefore, Honda Passport code B16 does not mean maintenance is required at 16,000 miles.

It simply combines service codes B, 1, and 6.

Honda Passport Maintenance Code A

Honda Passport Maintenance Minder A means:

Replace the engine oil.

This is the simpler of the two main maintenance codes.

Honda also notes that if the Maintenance Minder does not call for an oil change within 12 months after the system has been reset, the engine oil should still be changed annually.

Honda Passport A1 Service

One of the most common codes is:

A1

This means:

• Replace engine oil
• Rotate tires

A1 maintenance is relatively straightforward and will appear repeatedly during normal vehicle ownership.

Honda Passport A12 Service

Code A12 combines three maintenance items:

• A: Replace engine oil
• 1: Rotate tires
• 2: Replace air cleaner element and dust/pollen filter; inspect drive belt

This service is more extensive than a basic oil change because the engine air filter and cabin filter are also involved.

Honda Passport Maintenance Code B

Honda Passport maintenance code B represents a more comprehensive service than code A.

For current U.S. Passport models, B service includes replacement of the:

• Engine oil
• Engine oil filter

Honda also calls for inspection of components including:

• Front brakes
• Rear brakes
• Tie-rod ends
• Steering gearbox and boots
• Suspension components
• Driveshaft boots
• Brake hoses and lines
• Fluid levels and fluid condition
• Exhaust system
• Fuel lines and connections

Honda lists these items under Maintenance Minder B in the current Passport owner's documentation.

The exact details can differ slightly between model years, so checking the manual for our specific Passport is always worthwhile.

Honda Passport Maintenance Code 1

Maintenance subcode 1 means:

Rotate the tires.

Tire rotation helps distribute wear more evenly among all four tires.

This can contribute to:

• More consistent tread wear
• Longer usable tire life
• More predictable handling
• Better traction
• Reduced likelihood of replacing tires prematurely

Because the Passport is relatively heavy and available with an all-wheel-drive system, keeping tire wear reasonably even is especially important.

The code often appears alongside A or B, producing combinations such as:

• A1
• B1
• A12
• B12
• B16

Honda Passport Maintenance Code 2

Maintenance code 2 covers several items.

Honda specifies:

• Replace the air cleaner element
• Replace the dust and pollen filter
• Inspect the drive belt

The air cleaner element is the engine air filter.

The dust and pollen filter is commonly called the cabin air filter.

Severe Conditions and Code 2

Honda provides additional guidance for vehicles operated under certain environmental conditions.

For the 2026 U.S. Passport, Honda says the engine air cleaner element should be replaced every 15,000 miles (24,000 km) when the vehicle is operated in dusty conditions.

The cabin dust and pollen filter also has a 15,000-mile recommendation when the vehicle is primarily driven in urban environments with high concentrations of soot from industry or diesel vehicles.

This is why we should not always assume the standard Maintenance Minder interval is appropriate under severe operating conditions.

Honda Passport Maintenance Code 3

Honda Passport maintenance code 3 indicates drivetrain fluid service.

On the current Passport, Honda lists:

• Replace transmission fluid
• Replace transfer fluid where applicable

Transmission fluid deteriorates gradually because of heat, friction, and normal use.

Replacing it when requested by Maintenance Minder helps maintain proper transmission operation.

Drivers who frequently:

• Tow trailers
• Drive through mountains
• Operate in heavy traffic
• Carry substantial loads
• Drive under high-temperature conditions

may place additional stress on drivetrain components.

Always use the fluid specification required for our particular model year.

Honda Passport Maintenance Code 4

Code 4 is one of the more significant Honda Passport maintenance codes because it involves major engine maintenance.

For the 2026 U.S. Honda Passport, code 4 includes:

• Replace spark plugs
• Replace timing belt
• Inspect water pump

Honda also specifies shorter timing-belt replacement requirements under certain severe conditions.

For the 2026 Passport, if the vehicle is regularly operated above 110°F (43°C), below -20°F (-29°C), or while towing a trailer, Honda specifies timing-belt replacement every 60,000 miles (100,000 km).

A Note About Valve Clearance

This is an area where model-year differences matter.

Older Passport documentation, including the 2019 and 2022 manuals, lists valve clearance inspection as part of maintenance subcode 4.

The 2026 U.S. Passport manual lists spark plug replacement and timing-belt/water-pump service under code 4 but does not list valve-clearance inspection in that same code.

Therefore, when researching Honda Passport maintenance code 4, we should always verify the requirements for our exact model year rather than assuming every Passport has identical service requirements.

Honda Passport Maintenance Code 5

Maintenance code 5 means:

Replace engine coolant.

Coolant performs several critical jobs.

It helps:

• Control engine temperature
• Prevent overheating
• Protect against freezing
• Reduce corrosion inside the cooling system
• Protect cooling-system components

When the Maintenance Minder displays code 5, the engine coolant should be replaced according to Honda's procedures and with the appropriate coolant.

Honda Passport Maintenance Code 6

Maintenance code 6 means:

Replace rear differential fluid.

This code is particularly relevant to Passport models equipped with Honda's all-wheel-drive system.

Rear differential fluid lubricates and protects internal differential components.

Towing and Differential Fluid Changes

Honda provides an important severe-use recommendation for Passport owners who tow or frequently drive slowly in mountainous terrain.

For the 2026 Passport, Honda states that these conditions create additional mechanical stress on the differential fluid.

Honda recommends changing rear differential fluid at:

7,500 miles (12,000 km) initially

and then:

Every 15,000 miles (24,000 km)

for vehicles regularly operated under those conditions.

This is considerably more frequent than many owners expect, so anyone regularly towing with a Passport should pay special attention to differential maintenance.

Honda Passport Maintenance Code 7

Maintenance subcode 7 means:

Replace brake fluid.

Brake fluid is hygroscopic, meaning it can gradually absorb moisture.

Over time, excess moisture can reduce the fluid's performance and contribute to corrosion.

Honda provides an additional time-based rule for the Passport.

If Maintenance Minder code 7 does not appear within 36 months after the brake-fluid maintenance display was reset, Honda specifies replacing the brake fluid every three years.

Therefore, brake-fluid maintenance should not be ignored simply because the vehicle has accumulated relatively few miles.

What Does Honda Passport B1 Service Mean?

Honda Passport B1 service combines:

B Service

• Replace engine oil
• Replace oil filter
• Inspect brakes
• Inspect steering and suspension components
• Inspect drivetrain boots
• Check fluid levels and condition
• Inspect other specified components

Code 1

• Rotate tires

Therefore:

Honda Passport B1 = oil and filter service + inspections + tire rotation.

B1 is one of the most common Honda Maintenance Minder combinations.

What Does Honda Passport B12 Service Mean?

Honda Passport B12 service combines:

• B service
• Code 1
• Code 2

That means the vehicle generally needs:

• Engine oil replacement
• Oil filter replacement
• Brake/chassis/fluid inspections
• Tire rotation
• Engine air filter replacement
• Cabin air filter replacement
• Drive-belt inspection

Because several filters and inspections are included, B12 is more comprehensive than B1.

What Does Honda Passport B13 Service Mean?

Honda Passport B13 means:

• B service
• Tire rotation
• Transmission/transfer fluid service

In practical terms, it typically includes:

• Engine oil
• Engine oil filter
• B-service inspections
• Tire rotation
• Transmission fluid replacement
• Applicable transfer fluid replacement

B13 can therefore cost considerably more than a standard oil change because drivetrain-fluid service is added.

What Does Honda Passport B16 Service Mean?

Honda Passport B16 maintenance means:

• B service
• Tire rotation
• Rear differential fluid replacement

In other words:

B + 1 + 6 = B16

This is an especially common code for AWD Honda vehicles because rear differential fluid requires periodic replacement.

Passport owners who regularly tow should remember Honda's severe-use differential-fluid schedule because the fluid may need replacement more frequently than the standard Maintenance Minder interval.

What Does Honda Passport B17 Service Mean?

Honda Passport B17 service combines:

• B service
• Code 1 tire rotation
• Code 7 brake-fluid replacement

Therefore, it generally requires:

• Engine oil replacement
• Oil filter replacement
• B-service inspections
• Tire rotation
• Brake-fluid replacement

If the brake fluid has reached its time limit, we should not postpone the service simply because the Passport has low mileage.

Honda Passport Oil Life Percentage Explained

The Maintenance Minder also shows remaining engine oil life as a percentage.

The percentage is not simply an oil-level indicator.

It represents the system's estimate of the oil's remaining service life.

On the 2026 Passport:

• 15%: Maintenance is due soon
• 5%: Maintenance is due now
• 0%: Maintenance has reached the end of its calculated service life

After oil life passes its service limit, the Passport can display negative mileage showing how far the vehicle has traveled beyond the maintenance point.

What Should We Do at 15% Oil Life?

At approximately 15% oil life, we should begin planning the maintenance appointment.

The vehicle does not necessarily need to be stopped immediately, but service is approaching.

What Happens at 5% Oil Life?

At 5%, Honda considers maintenance due now.

We should arrange the appropriate service as soon as practical.

What Does 0% Oil Life Mean?

At zero percent, the calculated oil service life has expired.

Maintenance should no longer be postponed.

Does the Honda Passport Have a Fixed Maintenance Schedule?

The Passport primarily relies on the Maintenance Minder rather than giving every owner one identical oil-change interval.

This distinction matters.

Someone who drives thousands of highway miles may receive a maintenance reminder at a different point than someone who regularly drives short urban trips.

Environmental conditions can also change maintenance requirements.

Honda additionally provides time- or severe-use recommendations for certain items, including:

• Annual engine-oil replacement if Maintenance Minder does not request it within 12 months
• Brake-fluid replacement every three years when the Minder has not requested code 7
• More frequent air-filter maintenance in dusty environments
• More frequent differential-fluid replacement under specified towing/mountain-driving conditions
• Shorter timing-belt intervals under specified severe conditions

This combination of Maintenance Minder plus special-use rules is why the owner's manual remains important even when the dashboard automatically tracks maintenance.

U.S. vs Canadian Honda Passport Maintenance Codes

Canadian Honda Passport owners may notice different lettering and numbering.

For example, the 2026 Canadian Passport uses:

• A for engine oil
• 0 for engine oil and oil filter
• 9 for brake/chassis/fluid inspections

U.S. models combine several of those inspection tasks under B.

The numbered subcodes for items such as tire rotation, filters, transmission fluid, coolant, differential fluid, and brake fluid remain broadly similar.

This is one reason searching for a maintenance code online can occasionally produce conflicting answers.

Always check whether the information refers to a U.S. or Canadian Passport.

How to Reset the Honda Passport Maintenance Minder

We should reset the Maintenance Minder only after the required maintenance has actually been completed.

On the 2026 Passport, Honda's procedure uses the right selector wheel:

1. Turn the vehicle power mode to ON.
2. Display the Maintenance Minder screen.
3. Press and hold the right selector wheel for approximately 10 seconds.
4. Select the maintenance item that was completed or choose All Due Items when appropriate.
5. Press the selector wheel to reset the item.
6. Repeat as necessary for additional maintenance items.

Honda warns that failing to reset the system after maintenance can cause incorrect future maintenance intervals.

Older Passport models may use slightly different steering-wheel buttons, so we should use the reset instructions for the correct model year.

Should We Reset a Honda Passport Maintenance Code Without Doing the Service?

No.

Clearing a maintenance code does not mean the maintenance has been completed.

Resetting it prematurely can cause the Maintenance Minder to calculate future service requirements from an incorrect starting point.

For example, if code 6 is cleared without changing the rear differential fluid, the vehicle may no longer remind us when that fluid truly requires replacement.

The safer approach is simple:

Perform the maintenance first, then reset the corresponding code.

Are Honda Passport Maintenance Codes Warning Lights?

Not in the same sense as a check-engine light, oil-pressure warning, brake-system warning, or overheating warning.

Maintenance Minder codes are primarily scheduled maintenance notifications.

They tell us that preventive maintenance is due or approaching.

However, we should not confuse them with fault codes.

For example:

B16

is a maintenance code.

Something such as:

P0301

is an OBD-II diagnostic trouble code.

The two systems serve completely different purposes.

Why Following Honda Passport Maintenance Codes Matters

It can be tempting to postpone maintenance when the SUV still feels perfectly normal.

Preventive maintenance exists precisely because many fluids and components degrade long before we notice obvious symptoms.

Following the Maintenance Minder can help us:

• Protect the engine
• Maintain transmission performance
• Reduce uneven tire wear
• Protect the AWD system
• Maintain braking performance
• Identify worn suspension components
• Detect fluid leaks
• Reduce the risk of expensive repairs
• Maintain a documented service history

A neglected fluid change can eventually cost considerably more than preventive service.

This is particularly important with items such as transmission fluid, rear differential fluid, timing-belt service, coolant, and brake fluid.

Honda Passport Maintenance Codes by Model Year

The overall Maintenance Minder concept has remained similar throughout the modern Honda Passport lineup, but we should not assume every model year has completely identical requirements.

The 2019 Passport manual, for example, uses codes A, B, and subcodes 1 through 7 for U.S. models.

The 2026 Passport also uses A, B, and subcodes 1 through 7, but certain details have changed.

One example is maintenance code 4: older manuals such as the 2019 documentation include valve-clearance inspection, while the 2026 U.S. manual does not list it as part of code 4.

For that reason, the best reference is always the owner's manual belonging to our exact model year.

Honda Passport Maintenance Codes FAQ

What does Honda Passport maintenance code B1 mean?

Honda Passport B1 means the vehicle requires B maintenance plus subcode 1. This generally includes an engine oil and filter change, Honda's specified inspections, and a tire rotation.

What does Honda Passport maintenance code B16 mean?

B16 combines B service, code 1, and code 6. That means oil and filter service with inspections, a tire rotation, and rear differential fluid replacement.

What does Honda Passport maintenance code B12 mean?

B12 indicates B maintenance plus codes 1 and 2. In addition to the normal B service, the tires are rotated, the engine and cabin filters are replaced, and the drive belt is inspected.

How long can we drive after the Honda Passport maintenance light comes on?

The answer depends on the oil-life percentage. Honda identifies 15% as maintenance due soon and 5% as maintenance due now. At 0%, the calculated engine-oil service life has expired, so maintenance should be performed rather than continually postponed.

How often does a Honda Passport need maintenance?

There is no single mileage interval that applies to every Maintenance Minder service because Honda calculates oil life according to operating conditions. Some items also have time- or severe-use requirements. For example, Honda specifies annual oil replacement if the Maintenance Minder has not requested it within 12 months and brake-fluid replacement every three years if code 7 has not appeared.

Final Thoughts on Honda Passport Maintenance Codes

Understanding Honda Passport maintenance codes makes maintaining the SUV much easier.

The basic system is simple once we know how to read it:

• A means engine oil replacement.
• B means oil and filter replacement plus inspections.
• 1 means tire rotation.
• 2 covers the engine/cabin filters and drive-belt inspection.
• 3 means transmission and applicable transfer-fluid service.
• 4 covers major engine service such as spark plugs and timing-belt maintenance.
• 5 means engine coolant.
• 6 means rear differential fluid.
• 7 means brake fluid.

When codes are combined, we simply perform all of the corresponding services.

So if our Honda Passport displays B16, we do not need to search for an entirely separate service schedule. It simply combines B + 1 + 6.

The most important point is to follow the requirements for our specific model year, because Honda can revise individual maintenance items between generations.

Keeping up with these Maintenance Minder codes gives us a straightforward way to protect the engine, transmission, AWD system, brakes, tires, and other critical components while keeping our Honda Passport ready for many more miles.

If you want to know other articles similar to Honda Passport Maintenance Codes: Complete Maintenance Minder Guide you can visit the category Maintenance.