CARFACTBOOK / DIAGNOSTIC REFERENCE

Your car. Your symptoms. The next safe check.

Select your vehicle, explore its systems, and choose what you are seeing. Follow existing evidence-based checks, understand when to stop safely, and prepare a useful mechanic handoff—without guessing which part failed.

01 / Your diagnostic vehicle

Toyota Prius ZVW50

2015–2018 · Japan

Open verified vehicle facts →Exact-chassis evidence depends on source applicability.

Toyota · Prius · ZVW50 · Fourth generation · pre-facelift · Attitude Black Mica
Photo: 根川孝太郎 (Kotaro Negawa) · CC BY-SA 4.0 · Pictured Fourth generation · pre-facelift · Attitude Black Mica
03 / Choose what you observed

Electrical

Keep the 12V battery, charging system and key recognition separate.

No-start / no electrical powerRecord what the dashboard and starter or READY system actually do.Guided checksKey not recognizedCheck the exact vehicle key and 12V references before replacing anything.Guided checksBattery / charging warningA charging warning does not prove the battery itself failed.Warning guidance
04 / Next safe action

Battery / charging warning

This issue uses existing safety or repair research. The guide does not establish the actual cause in your car.

Check warning guidance →
Parts & cost information

Relevant verified part specifications, when available, appear in the evidence section after guided checks. A symptom alone cannot justify a replacement or a price. No unsupported live parts prices are shown.

Compare actual itemized repair quotes →
Immediate owner decisions

Urgent symptoms: fluid leaks, tire problems and warnings

A tire blowout, low oil pressure, slipping transmission or overheating can require an immediate safe stop. Choose the relevant owner-safety research before starting vehicle-specific diagnosis.

Tires · NHTSA guidance

Flat tire / blowout

Stabilize safely, identify when a tire needs professional assessment, and confirm the vehicle's placard.

Engine oil · owner research cluster

Oil leak / low pressure

Start with urgent low-pressure warnings, then compare small leaks, valve-cover, oil-pan, post-service and cost questions.

Gearbox · fluid-loss research

Transmission fluid leak

Fluid identification, dangerous shifting symptoms, post-service checks and a diagnosis-first estimate.

Cooling · manufacturer warnings

Coolant leak / overheating

Separate A/C water from coolant, observe the reservoir cold, and respect stop-driving warning signs.

Browse or contribute reviewed problem & repair evidence →