DOLPHIN / Maintenance

BYD Dolphin tyre pressure reading looks wrong: check units

A change from a three-digit pressure to a two-digit reading can mean the units changed, but a puncture or sensor fault still needs checking. Do not judge by the number alone.

3 min readReviewed 27 October 2026

2023 / 2025BYD DOLPHIN export controlsEurope / right-hand drive

CHECK YOUR CARBYD DOLPHIN · 2023 / 2025 model manual · Europe English RHD edition 20251217 · fitted equipment and software dependent

Applies to the official DOLPHIN (2023 & 2025), English RHD, 20251217 handbook. Chinese domestic Dolphin (海豚) reports supplied the question; they do not verify an export-car defect, shared firmware or a repair. Match your car's handbook before using a control.

THE QUICK ANSWER

Read the pressure unit alongside the value, compare a cold gauge measurement with the driver-door label and inspect the tyre. Treat a missing or implausible reading as an unresolved monitoring issue.

China-market owner report

In a discussion dated 2026-10-18, the linked China-market report raised this issue: An owner of a 2022 China-market Dolphin questioned a pressure display changing to 47 and reported a puncture without an alert. Units and sensor condition were not independently verified. This is an individual account, not a confirmed diagnosis or failure-rate finding. The steps below use the export handbook.

Checks to make while safely parked

1Read the whole displayPark and inspect the pressure value, unit and warning message together. Note whether the number is pressure or temperature before comparing it with an older photograph.
2Measure independentlyUse a suitable gauge on cold tyres and compare with the pressure label for your own car. Keep the gauge and label units consistent rather than copying the Chinese post’s numbers.
3Inspect for damageLook for a visibly low tyre, foreign object or sidewall damage. If a tyre is flat or damaged, use the handbook’s puncture assistance guidance rather than continuing to test the display.
4Report monitoring discrepanciesIf measured pressure and displayed information remain inconsistent, contact BYD. Mention recent tyre work and provide both measured and displayed values with units.

Tick steps as you go. Your progress stays in this tab.

Check the result and know when to stop

TPMS assists the driver; it does not remove the need for physical checks. The Chinese report concerns a 2022 domestic car, and its exact units and equipment were not independently confirmed. Do not install an aftermarket sensor kit or use a reset sequence from that discussion on this export Dolphin.

Common questions

Can 47 and 250 be compared without units?+

No. Read the units and identify what each number represents first.

Does no warning prove a tyre is safe?+

No. Check pressure and condition directly, especially if you suspect a puncture.

SOURCES & SCOPE

Where this guide comes from

Operating steps are checked against manufacturer documentation; Chinese owner discussions are labelled as anecdotal reports. They identify questions, not the prevalence or cause of a fault. Reviewed on 27 October 2026. This is a source-based guide, not a claim of hands-on vehicle testing.

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BYD Dolphin tyre pressure reading looks wrong: check units

China-market owner report

Checks to make while safely parked

Check the result and know when to stop

Common questions

Where this guide comes from

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