Toyota Mirai Fault Codes
You can find common Toyota Mirai fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Toyota Mirai Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Toyota Mirai has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Toyota Mirai Recalls »
Common Mirai Fault Codes
These are the most common Mirai fault codes that people are searching for.
Cylinder 1 Misfire DetectedLearn More Fixes
System Too Lean (Bank 1)Learn More Fixes
Lost Communication With ECM/PCM "A"Learn More Fixes
Intake Air Temperature Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
ABS Hydraulic Pressure Differential Switch Input Short Circuit To GroundLearn More
Cylinder 4 Misfire DetectedLearn More Fixes
Passenger Power Window Motor Circuit Short To GroundLearn More
Control Module PerformanceLearn More Fixes
Lamp Turn Signal Front Output Circuit Short To GroundLearn More
Wiper Rear High Limit Input Circuit FailureLearn More
Wiper Rear Motor Up Relay Coil Circuit Short To GroundLearn More
Lamp Backup Switch Input Circuit OpenLearn More
Lamp Turn Signal Front Output Circuit Short To BatteryLearn More
ABS Outlet Valve Coil RR Circuit Short To GroundLearn More
ABS Outlet Valve Coil RR Circuit FailureLearn More
ABS Inlet Valve Coil LF Circuit Short To GroundLearn More
Damper LR Circuit FailureLearn More
ABS Outlet Valve Coil Rear Circuit OpenLearn More
Lamp Brake Warning Output Circuit FailureLearn More Fixes
Code Word UnregesteredLearn More
Torque Converter Clutch Circuit Performance or Stuck OffLearn More
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Exhaust Camshaft Position Timing - Over-Retarded (Bank 1)Learn More
Transmission control module (TCM) – EEPROM malfunctionLearn More
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Fuel System Leak Detected - Large LeakLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 2Learn More
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Throttle Pedal Position Sensor/Switch A Circuit MalfunctionLearn More
Camshaft Position Sensor Circuit MalfunctionLearn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Yaw Rate Sensor Signal FaultLearn More
Input/Turbine Speed Sensor Circuit No SignalLearn More
ECM/PCM Processor FaultLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1Learn More Fixes
Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1)Learn More
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)Learn More
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Lost Communication With Brake System Control ModuleLearn More
Lost Communication With Fuel Injector Control ModuleLearn More Fixes
High Speed CAN Communication BusLearn More Fixes
Lost Communication With Anti-Lock Brake System (ABS) Control ModuleLearn More
Lost Communication With ECM/PCM "B"Learn More
Control Module Communication Bus "A" OffLearn More Fixes
Lost Communication with Fuel Pump Control Module (FPCM)Learn More
Lost Communication With Body Control Module "B"Learn More
Lost Communication With Body Control ModuleLearn More
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Secondary Air Injection System Relay A circuit MalfunctionLearn More
Knock Control CPU.Learn More
Igniter Circuit Malfunction - No. 1.Learn More
Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)Learn More
Throttle position (TP) sensor/mass air flow (MAF) sensor – implausible signalLearn More
Air/Fuel Sensor Circuit Range/Performance. (Bank 1 Sensor 2)Learn More
Heated oxygen sensors (H02S) 1 (upstream), bank 1Learn More
VVT System.Learn More
Accelerator pedal position (APP) sensor 2 – signal voltage lowLearn More
CI Circuit MalfunctionLearn More
Fuel Level Sensor B Circuit MalfunctionLearn More
Heated oxygen sensors (H02S) 1 (upstream), bank 1/2Learn More
Persistent MisfireLearn More
ECM/TP sensor amplifier – circuit malfunctionLearn More
Heated oxygen sensor (H02S) 2 (downstream), bank 1Learn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
- Manufacturer: Toyota
About the Mirai
The Mirai is a Japanese-built vehicle created by Toyota since the December of 2014.
Still in production today, the Mirai is a mid-sized hydrogen fuel cell vehicle and is one of the first mass-produced cars of its type.
First shown at the November 2014 Los Angeles Motor Show, the Mirai has currently sold in excess of 18,000 units in countries like Japan and Northern America.
With an impressive range of 502km on one full tank, the Mirai enjoys a fuel economy rating of 66 mpg and in August 2021 and set the world record.
First generations used the Toyota Fuel l Cell system, which introduced hybrid technology to fuel cell technology including components such as high-pressure hydrogen tanks, FC Boost converter and a fuel cell stack.
Capable of accelerating up to 60mph within 9 seconds, there is characteristically only one transmission.
Following intensive crash testing, the Mirai is designed specifically to protect frontal, side and rear impact points; this is equally important so as to protect the fuel cell stack and high-pressure tanks.
The second generation sold onwards from 2020, having been unveiled in October 2019 and strived to achieve a 30 percent increase in driving range. With the Advanced Drive, the Mirai had new features like advanced parking assist, change lane alert, lane centering system and a function which allows for maintaining a safe distance from the vehicle in front.
Some common fault codes found with the Mirai are:
- P0301 – a diagnostic issue pointing to a misfiring of cylinder one and is alerted to by the on board diagnostics system.
- P0171 – Either too little fuel or too much oxygen is making the system too lean.
- U0100 – The powertrain control module and the engine control module cannot communicate
- P0110 – A general code signifying there is an incorrect voltage relating to the electrical circuit sensor.
- P0441 – An incorrect purge flow.