A1 — common oil + tires
Main A (oil) plus sub 1 (tire rotation). Often the first code GTA owners see after short-trip winter driving.
Photo: American Honda (Honda US Newsroom). Photograph your own dash code — not a stock screen.
How to read a stacked code like A12 or B17
Read left to right: one main letter (or 0 on newer cars), then each digit as its own sub item. A12 is A + 1 + 2 — not a secret fourth code named “A12.”
B1 / 01 — oil, filter, tires
Honda Canada describes 0 or B when oil and filter are due. Add 1 for tire rotation. Which letter/zero you see depends on A/B vs A/0 schedule.
B12 — filters enter the chat
Oil-and-filter main service plus tire rotation plus air/cabin filter and belt inspection items from sub-code 2.
A15 / bigger stacks
Every digit is additive. Photograph the display and bring the VIN so the advisor maps the right fluid/filter lines.
Main codes (letter or zero)
Honda Canada runs two schedule families. Older vehicles use A/B; many current Civics, CR-Vs, Accords, Pilots, Passports, Odysseys, HR-Vs, and the 2026 Prelude use A/0. Same idea — oil life first, then extras.
| Code | What Honda Canada describes |
|---|---|
| A | Replace engine oil. Honda Canada also notes the system is designed to show “Service Due Soon (A)” when estimated oil life reaches 15%. |
| 0 or B | Replace engine oil and oil filter. Honda Canada: when oil and filter are both due, the alert uses 0 or B depending on the schedule your vehicle uses. |
Overview: honda.ca maintenance schedules. A/0 line items: Maintenance Minder A/0 schedule PDF (EN).
Sub-codes 1–7 (and when 9 appears)
Summarized from Honda Canada’s A/0 schedule PDF. Extreme use (towing, mountains, dust) can force earlier fluid/filter work than the Minder alone shows.
| Sub | Service theme (confirm on your schedule / manual) |
|---|---|
| 1 | Rotate tires. |
| 2 | Replace engine air filter; replace cabin air filter; inspect drive belts. |
| 3 | Replace transmission fluid; clutch fluid on manuals; transfer fluid on certain V6 4WD/AWD models. |
| 4 | Replace spark plugs; inspect valve clearance; on certain V6 models also timing belt and water pump inspection items as listed. |
| 5 | Replace engine coolant. |
| 6 | Replace rear differential fluid (4WD/AWD models). |
| 7 | Replace brake fluid (Honda also notes a time-based brake-fluid rule if the indicator does not appear within 36 months). |
Honda Canada also lists additional schedule notes (dusty roads, heavy towing, extreme temperatures). Download the PDF for your schedule family rather than relying on a US dealer blog.
What Maintenance Minder does not do
Oil level
Honda Canada: no oil-level sensor in the Minder. Check level regularly.
Pads, tread, battery
Wear items are inspected at service — not continuously measured by the wrench light.
Extreme use
Towing, mountains, dust/soot can require earlier filter/fluid work than the display alone predicts.
Health check
Leaks, warning lights, or noises still mean see a Honda dealer — regardless of Minder status.
FAQ
What does Honda Maintenance Minder code A1 mean?
A is oil service; 1 is tire rotation. Confirm exact operations for your model year on Honda Canada’s schedule.
What does B1 or 01 mean?
0 or B means oil and filter are due (per Honda Canada). 1 adds tire rotation. Your car uses either the A/B or A/0 schedule family.
What does B12 mean?
Oil-and-filter main service plus tire rotation plus the filter/belt items under sub-code 2.
Does Maintenance Minder check oil level?
No — Honda Canada says it does not monitor oil level.
Where do I see Canadian pricing for these codes?
See Henry’s Maintenance Minder prices reference, then confirm today’s written quote.
Wrench light on — and thinking about your next Honda?
Text Henry a photo of the Maintenance Minder screen plus model/year. For service authorization, confirm the itemized quote with the service department. If you are also shopping a replacement Civic, CR-V, or Pilot, he can line up trade timing with the work you actually need.
Sources: Honda Canada Maintenance Schedules; Maintenance Minder A/0 Schedule PDF. This page is an owner decoder, not a service authorization.