Toyota Aygo X Fault Codes
You can find common Toyota Aygo X 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 Aygo X 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 Aygo X has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Toyota Aygo X Recalls »
Common Aygo X Fault Codes
These are the most common Aygo X fault codes that people are searching for.
System Too Lean (Bank 1)Learn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Shift Solenoid A MalfunctionLearn More
Torque Converter Clutch Circuit MalfunctionLearn More
Transmission Control System (MIL Request)Learn More
Park / Neutral Switch Input CircuitLearn More
Clutch Actuator Circuit / OpenLearn More
Shift Solenoid F Control Circuit HighLearn More
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
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 ECM/PCM "A"Learn More Fixes
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
- Manufacturer: Toyota
About the Aygo X
The Aygo X was launched in 2022 as the replacement for the Aygo. It is currently in its first generation and is marketed as a crossover city car
It is among the first models to occupy this new segment of the market with other competing models including the Fiat Panda Cross and Hyundai Casper.
Despite Toyota having a reputation for reliability, Aygo X owners have reported a few fairly common fault codes. The most common of these is P0420, which represents an issue with the catalytic converter.
Older models are more prone to suffering from exhaust leaks, which can cause this, but the most likely cause is a failing or damaged catalytic converter.
Another fairly common code is P0171, which is a broad-scope code that indicates that the engine is running too lean. The problem with this is that anything that disrupts the ideal air-fuel mixture can be the cause.
Owners have found some success in checking the MAF sensor for defects or dirt. Another fairly common culprit is a faulty oxygen sensor.
Some owners have also reported fault code P0011, which is a serious code. This is logged when the intake camshaft is over-advanced and the PCM cannot fix it. Aygo owners need to have this type of code fixed immediately to prevent serious damage from occurring.
With any luck, the main cause for this is a faulty camshaft position sensor. Other potential causes include a faulty oil control solenoid, as well as running the engine with old or dirty oil.