Subaru Fault Codes
On this page you can find the meaning of the fault code you may be seeing coming from your Subaru.
Either choose your model from below or scroll down even further to search and see popular fault codes across all Subarus.
(click your model)
Search Subaru Codes
Do you know the fault code already? Enter it in the box below and hit "Search Codes".
Popular Subaru Fault Codes
These are the most popular Subaru fault codes that people are searching for.
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Transmission Control System MalfunctionLearn More Fixes
Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)Learn More Fixes
Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)Learn More
Intake Air Temperature Circuit High InputLearn More Fixes
Illuminated Entry Input Open CircuitLearn More
System Too Lean (Bank 1)Learn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Evaporative Check Solenoid Circuit MalfunctionLearn More
Cylinder 1 Misfire DetectedLearn More Fixes
System Too Rich (Bank 1)Learn More Fixes
Post Catalyst Fuel Trim System Too Lean Bank 1Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 2 Sensor ALearn More
Lost Communication With Body Control ModuleLearn More
Control Module Communication Bus "A" OffLearn More Fixes
SCP (J1850) Invalid or Missing Data for Interior Lamp OutageLearn More
SCP (J1850) Invalid or Missing Data for Seat Motion / ControlLearn More
Code Word UnregesteredLearn More
Evaporative Emission System Control Valve Low/No FlowLearn More
Idle Air Control Underspeed ErrorLearn More
HO2S Insufficient Switching Bank 2 Sensor 1Learn More
TFT Sensor In Range Failure HighLearn More
Exhaust Gas Recirculation Valve Insufficient LiftLearn More
Transmission control valve solenoids -ground circuit malfunctionLearn More
EEPROM MalfunctionLearn 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 ALearn 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
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Fuel Level Sensor Circuit High InputLearn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
Idle Control System RPM higher Than ExpectedLearn More Fixes
Post Catalyst Fuel Trim System Too Rich Bank 1Learn More Fixes
Throttle/Pedal Position Sensor/Switch A / B Voltage CorrelationLearn More Fixes
Throttle/Pedal Position Sensor/Switch D/E Voltage CorrelationLearn More Fixes
Bank 1 Air/Fuel Ratio ImbalanceLearn More Fixes
Outside of Japan Subarus is known for its performance models such as the Impreza and the countless special edition trims they have released for them.
Within Japan, the company is famous for its selection of tiny Kei cars.
For the global models that the brand markets you may find that when plugged into an OBD2 reader they present these common fault codes.
One of the most common is the P0420 which is a sign that the ECM (engine control module) is detecting that the catalytic converter isn’t performing as it should be. This may not be the case though as the sensor that determines this could be faulty and so needs to be tested before any parts are replaced.
Another common Subaru fault code is the P0700 and this one is going to pop up when there is a problem with the transmission. This error is usually more common on automatic Subaru models as the car needs to do a lot more thinking when it comes to selecting gears etc.
As an owner of a Subaru, you may also find your model plagued by the reader P0026 code which is associated with the VVTI system. That variable valve timing system adjusts the engine to perform differently depending on the conditions and so requires sensors and valves to make this happen. As these sensors are surrounded by potentially dirty elements you can find that they get clogged up and end up failing to report what is really happening in the engine.
- Models: 8