Model guide · Fit
Honda Fit Check Engine Light: Causes, Codes & Fixes
On this page 5 sections
- Steady light
- Stored fault — Honda: avoid high speeds, get it inspected immediately.
- Flashing light
- Active misfire — stop safely.
- Misfire codes
- P0301–P0304 name the cylinder; check its coil and plug.
- Read it
- At a parts store, or with an OBD2 reader.
A flashing light on a Fit means an active misfire — raw fuel reaches the exhaust and can damage the catalytic converter. Stop safely and get it diagnosed.
The pattern that matters on a Fit is the same one covered in the full Honda check engine light guide: read the light’s behavior first, then read the code.
Steady light vs flashing light
- Steady light: a stored fault. Honda says to avoid high speeds and have the vehicle inspected immediately.
- Flashing light: an active misfire happening right now. On a Fit you may feel it as a shake at idle. Stop safely — the flashing-light guide covers why it can’t wait.
What causes the check engine light on a Fit
- Worn ignition coils and spark plugs. A single tired coil produces a one-cylinder misfire — P0301–P0304 with a shake to match.
- Gas cap and EVAP leaks. A cap that didn’t click sets the same P0455 / P0456 family as any Honda — the fuel-cap check is the first move. Honda’s own P1457 canister code can also appear.
- Oxygen sensors. A lazy upstream sensor skews fuel trim and lights the lamp; it can set P0134-family codes.
- Catalytic converter efficiency. P0420 can show up on higher-mileage Fits. The code alone doesn’t condemn the converter. A failing sensor can set it too, so diagnose before buying the expensive part.
Honda Fit trouble codes
| Code | What it points at |
|---|---|
| P0301–P0304 | Single-cylinder misfire — check the plugs and the coil |
| P0455 / P0456 | EVAP leak — start with the gas cap |
| P1457 | Honda EVAP canister-side leak on aging cars |
| P0420 | Converter efficiency — verify before replacing |
The full code index covers everything else a Fit might throw.
The VSA light connection
From 2009 the Fit carries Honda’s stability system, and an engine fault can take it offline. If the check engine and VSA light are on together, start with the engine code.
What to do
- Check the gas cap — click it tight, drive for several days, and an EVAP light may clear itself.
- Read the code — at a parts store, or with a basic reader at home.
- Follow Honda’s rule for the light — if it’s steady, avoid high speeds and have the vehicle inspected immediately; if it’s flashing, stop safely.
- Clear it properly after the fix — the reset guide covers both the scanner method and letting drive cycles do it.
FAQ
Why is the check engine light on in my Honda Fit?
Possible Fit triggers include a loose gas cap or small EVAP leak, a misfire from worn spark plugs or an ignition coil, an aging oxygen sensor, or the P0420 catalytic-converter efficiency code on high-mileage cars. Read the code first so you know which of these you're dealing with before any money changes hands.
Can I drive my Honda Fit with the check engine light on?
If the light is steady, Honda says to avoid high speeds and have the vehicle inspected immediately. If the light is flashing, or the engine is shaking or down on power, stop as soon as it's safe — an active misfire can damage the catalytic converter.
Which check engine codes can a Honda Fit throw?
A Fit can set misfire codes (P0300 through P0304) from plugs and coils, EVAP leak codes (P0442, P0455, P0456) from the cap or a small leak, oxygen-sensor codes like P0134, and, on older, higher-mileage cars, the P0420 converter-efficiency code. Honda's own P1457 EVAP canister code can also appear.
Does the Honda Fit have a VSA light too?
Fits from 2009 on carry Honda's VSA stability system, and an engine fault that affects power delivery can switch VSA off and light its lamp alongside the check engine light. When the two appear together, start with the engine code; fixing it can clear the VSA light too.
Sources
Owner's manual references are to the model and year named above. Wording and procedures can differ on your Honda, so check your own owner's manual.
How we source and correct →