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Deflation Warning System Indicator
Honda deflation warning system indicator in car: next steps
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
Honda's Deflation Warning System indicator stays on when a tyre is significantly under-inflated or needs calibration, and blinks for about one minute before staying on if there is a system fault or a compact spare is fitted. Stop safely, set cold pressures and calibrate or visit a dealer.
Safety first
Stop and check this first
- Honda warns that driving on an extremely under-inflated tyre can cause it to overheat and fail: avoid abrupt cornering and hard braking, stop in a safe place and always inflate tyres to the prescribed level.
- The deflation warning system does not warn of over-inflation and may be delayed or not come on at all under rapid acceleration, deceleration or steering, on snowy or slippery roads, with tyre chains or during rapid air loss.
Safe checks you can perform
- Notice whether the light came on steady or blinked for one minute first
- Check and set cold tyre pressures to the driver doorjamb label
- Start calibration on Display Audio with the transmission in P
Leave these tasks to a qualified professional
- Do not attempt this professional task: Tyre inspection and deflation warning system fault readout
- Do not attempt this professional task: Matching tyre replacement and system calibration
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Tyre inspection and deflation warning system fault readout
What they doThe Honda dealer inspects all four tyres for punctures or mismatched sizes and reads the deflation warning system fault memory when the indicator blinks for one minute and stays on or returns with correct cold pressures.
They must show youthe condition and pressure measured on all four tyres and any stored or pending codes in the deflation warning system.
In writingthe tyre pressures found, any puncture or size mismatch identified, the fault codes read and whether codes were cleared before or after the repair.
Matching tyre replacement and system calibration
What they doAfter repairing or replacing the affected tyre (Honda recommends using the same brand, model and size as the originals) or fixing the system fault, the workshop sets cold tyre pressures and starts calibration.
They must show youthe size and model of any replacement tyre, the cold pressures set and the calibration started on the display.
In writingthe final cold pressures, the tyre repaired or replaced and confirmation that calibration started without error.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Notice whether the light came on steady or blinked for one minute first
- Who:
- you, as soon as you see the indicator on the Civic e:HEV instrument panel.
- How:
- drive carefully without abrupt cornering or hard braking, stop in a safe place and note whether the indicator illuminated steadily straight away or blinked for about one minute before staying on.
- Result that matters:
- telling a low-pressure or calibration alert apart from a system fault or compact-spare warning.
- If it blinked for about one minute and then stayed on with regular tyres installed:
- have the vehicle inspected by a Honda dealer as soon as possible.
- If it came on and stayed on without the one-minute blink:
- check the tyre pressures next.
- Evidence to keep:
- a note of whether the light blinked for a minute first and a photo of any gauge message.
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks
Check and set cold tyre pressures to the driver doorjamb label
- Who:
- you, with the vehicle stopped in a safe place and the tyres cold.
- How:
- read the specified pressures on the driver-side doorjamb label, check all four tyres with a pressure gauge and inflate them as needed; also check that all four tyres are the same size and type and that no tyre chains or compact spare are fitted.
- Result that matters:
- setting all four regular tyres to the prescribed cold pressure before running the calibration required by Honda.
- If one or more tyres were low:
- inflate to the doorjamb figure and watch for a slow puncture if the warning returns.
- If a compact spare tyre is installed:
- the system cannot be calibrated with it; have the regular tyre repaired or replaced and refitted as soon as possible.
- Evidence to keep:
- before-and-after cold pressure readings for each wheel and a photo of the doorjamb label.
Check and inflate tyres only with the car completely stopped in a safe place away from traffic; an extremely under-inflated tyre can get very hot while driving.
Evidence: Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks · Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
Start calibration on Display Audio with the transmission in P
- Who:
- you, with the car at a complete stop, transmission in P, power mode in ON and no tyre chains or compact spare fitted.
- How:
- on Display Audio select Vehicle Settings, then Deflation warning system, then Calibrate; if Calibration Failed to Start appears, repeat that step.
- Result that matters:
- starting the calibration process, which finishes automatically after about 30 minutes of cumulative driving between 40 and 100 km/h (25-62 mph).
- If the indicator goes off and calibration completes (or after a 12 V battery reconnect it clears after a short drive above 20 km/h / 12 mph):
- the system is working normally.
- If the indicator comes on even with properly inflated specified regular tyres installed:
- Honda says to have the vehicle checked by a dealer.
- Evidence to keep:
- photo of the Display Audio calibration screen and the mileage when calibration was started.
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks · Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Vehicles
- Brand
- Honda
- Product type
- Cars
Known code variants
- calibrar sistema de aviso de desinflado Honda
- Honda Civic tyre pressure light on
- Honda deflation warning system calibration
- Honda TPMS light blinks then stays on
- Low Tyre Pressure Indicator
- Low Tyre Pressure/Deflation Warning System Indicator
- luz presión neumáticos parpadea Honda
- Testigo del sistema de aviso de desinflado
- Testigo del sistema de aviso de desinflado/presión baja de los neumáticos
- testigo presión baja neumáticos Honda Civic
What it means
In the 2026 Honda Civic e:HEV online owner's manual (manuals.honda.co.uk), the deflation warning system does not measure air pressure directly inside each tyre; instead it compares the rolling radius and rotational characteristics of each wheel while driving. Whether the indicator stays on or blinks for one minute and remains lit, the light alone never proves a part has failed: it can reflect low pressure, uncalibrated settings, a compact spare, a reconnected 12 V battery or a system fault, and calibration steps on other Honda models can differ.
Warnings and stop conditions
- Highsource verified
Honda warns that driving on an extremely under-inflated tyre can cause it to overheat and fail: avoid abrupt cornering and hard braking, stop in a safe place and always inflate tyres to the prescribed level.
Evidence: Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks
- Mediumsource verified
The deflation warning system does not warn of over-inflation and may be delayed or not come on at all under rapid acceleration, deceleration or steering, on snowy or slippery roads, with tyre chains or during rapid air loss.
Evidence: Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
Symptoms and causes
Probable causes · in order
- Significantly low air pressure in one or more tyresCommon
Honda states the indicator comes on and stays on when wheel rotation comparisons show that one or more tyres are significantly under-inflated.
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks · Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
- Deflation warning system not calibrated or still initialisingCommon
The light stays on after inflating, rotating or replacing tyres if calibration has not been started, and may come on briefly at power ON if the car is not moved within 45 seconds while completing its 30-minute calibration drive at 40-100 km/h (25-62 mph).
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
- Problem in the deflation warning systemPossible
If the indicator blinks for about one minute and then stays on with regular tyres fitted, Honda indicates a problem with the deflation warning system itself.
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks
- Compact spare tyre, tyre chains, heavy trailer load or 12 V battery reconnectPossible
The manual notes that fitting a compact spare tyre, using tyre chains, carrying an uneven load such as a trailer or reconnecting the 12-volt battery can also turn the indicator on.
Evidence: Honda Civic e:HEV 2026 owner's manual: Low Tyre Pressure/Deflation Warning System Indicator · Honda Civic e:HEV 2026 owner's manual: If the Low Tyre Pressure/Deflation Warning System Indicator Comes On or Blinks · Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
Virtual technician
Does Deflation Warning System Indicator still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 5
Honda Civic e:HEV 2026 owner's manual: Deflation Warning System
Honda · 2026 · manual
- 6
Manual del propietario Honda Civic e:HEV 2026: Sistema de aviso de desinflado
Honda · 2026 · manual
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