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Safety Disclaimer

Critical safety information for all OBDAssistant features.

Read Before Use

OBDAssistant is an informational tool. It is NOT a substitute for professional mechanical inspection, certified testing equipment, or qualified repair advice. All test results, AI insights, and diagnostic data are estimates and may contain errors. Your safety and the safety of others depends on professional verification.

General Vehicle Safety

  • Do not use OBDAssistant while driving or operating a vehicle.
  • Do not ignore dashboard warning lights based on app readings.
  • Do not clear diagnostic codes without understanding the underlying cause.
  • Clearing codes does not fix faults and may erase diagnostic evidence or reset emissions readiness monitors.
  • Safety-critical faults involving brakes, steering, airbags, overheating, charging system, emissions, or drivability require immediate professional inspection.

AI Diagnostic Assistant

AI guidance is informational only, may be incomplete or wrong, and does not replace a qualified mechanic, WOF inspection, manufacturer diagnostic process, or safety inspection. Vehicle data may be processed by external AI providers. Always verify AI suggestions with a professional.

Brake Test

The brake test uses phone accelerometer/gyroscope sensors. It is:

  • Not a certified brake tester or calibrated measurement device
  • Not a WOF, compliance, or roadworthiness result
  • Affected by phone mounting, calibration, road surface, tyres, ABS, weather, gradient, and sensor quality

Only perform brake tests where safe and legal. Never rely solely on these results to assess brake safety.

Dyno / Performance Tests

Horsepower, torque, 0–100, and quarter-mile results are estimates only. They are:

  • Not chassis-dyno certified
  • Affected by GPS/sensor quality, vehicle weight estimates, road gradient, wind, tyres, drivetrain loss assumptions, and phone placement

Obey all road laws. Only perform performance tests in safe, legal environments such as closed courses or designated testing facilities.

Suspension Test

Suspension test results are indicative only. They are not a certified suspension inspection, WOF result, or substitute for professional workshop testing. Accuracy depends on phone mounting, road surface, speed, tyre pressure, suspension type, and sensor quality.

Sentinel / Background Monitoring

Sentinel performs background health checks via Bluetooth/OBD reconnection. It may miss alerts, produce false positives or negatives, or fail to reconnect. Notifications are not emergency warnings or guaranteed monitoring. You remain solely responsible for your vehicle's maintenance.

Reports & Exports

Generated reports are informational summaries only. They are not certified inspection reports, WOF certificates, insurance documents, emissions compliance certificates, valuation reports, or manufacturer diagnostic reports.

Contact

Mellers Tech Limited, New Zealand
support@obd2assistant.com

Diagnose by symptom

  • It cranks, but it will not fire
  • It failed the emissions test
  • The light came on right after you filled up
  • It hesitates when you ask for power
  • The temperature is not where it should be
  • Why your engine shakes at idle
  • Something is rattling underneath
  • It stalls when you come to a stop
  • Your fuel economy fell off a cliff
  • Several warning lights came on together

Trouble codes

  • All trouble codes
  • Powertrain codes
  • Chassis codes
  • Body codes
  • Network codes

Guides & reference

  • Technical wiki
  • CAN Bus Architecture: The Vehicle's Nervous System
  • ECU Knock Logic: The Physics of Engine Protection
  • OBD2 Emissions Readiness Monitors Explained
  • Fuel Trim Mastery: Cracking the STFT/LTFT Puzzle
  • O2 Sensor Volatility: Signal Cross-Count Analysis
  • Engineering blog

For workshops

  • Workshop scan portal

Compare

  • All comparisons
  • OBDAssistant vs. Carly
  • OBDAssistant vs. FIXD
  • OBDAssistant vs. OBD AI
  • OBDAssistant vs. Torque Pro

OBD2 by region

  • Is My Vehicle OBD2 Compliant in the Australia?
  • Is My Vehicle OBD2 / EOBD Compliant in the New Zealand?
  • Is My Vehicle EOBD Compliant in the United Kingdom?
  • Is My Vehicle OBD2 Compliant in the United States?

The app

  • AI diagnostic app
  • Download for Android
  • Vehicle compatibility
  • How it works
  • Car diagnostic app
  • The Official OBDAssistant™ Link Pro
  • Stahlcar OBD2 Adapter — Engineered for OBDAssistant
  • Veepeak OBDCheck BLE App Setup Guide
© 2026 Mellers Tech Limited. OBDAssistant™.New Zealand.