Vehicle Speed Control (Loss of Acceleration)

Intermittent or complete loss of acceleration, impacting drivability and safety. This can be linked to issues within the fuel cell system, electronic throttle control, or battery management. Estimated repair cost: $500 - $2,500.

FC Malfunction Warning (DTC P1DEF)

Illuminated warning light indicating 'FC malfunction, return vehicle to dealer for service,' often accompanied by Diagnostic Trouble Code P1DEF (FC Stack Performance). This is typically due to Fuel Control Module (FCM) calibration issues. Estimated repair cost: $200 - $1,500.

Potential starting problems can stem from a weak or dead battery, alternator issues, or a faulty starter motor. Estimated repair cost: $200 - $800.

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2016 Toyota Mirai Maintenance guide

Name: Maintenance dataset for 2016 Toyota Mirai
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed

MAINTENANCE SUMMARY

The 2016 Toyota Mirai, a pioneering hydrogen fuel cell vehicle, presents a unique maintenance landscape. While it lacks traditional engine oil changes, its complex fuel cell system requires specialized attention.

View Critical Issue: Fuel/Propulsion System Issues

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Reliability Score

Est. Annual Maintenance Cost

Data not available

TSBs & Recalls

101 TSBs | 0 Recalls

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Key Takeaways

The 2016 Toyota Mirai has a high TSB count (101), suggesting a complex system requiring diligent maintenance.
Top reported complaints include 'VEHICLE SPEED CONTROL' (loss of acceleration) and 'FUEL/PROPULSION SYSTEM' (issues related to hydrogen infrastructure and fuel economy).

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance