You can find common Subaru Forester fault codes on this page that when clicked take you to a detailed description.
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Subaru Forester 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 Subaru Forester has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Subaru Forester Recalls »
Common Forester Fault Codes
These are the most common Forester fault codes that people are searching for.
Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)Learn More
Pressure Control Solenoid C Control Circuit HighLearn More
Vehicle Speed Sensor MalfunctionLearn More
Heated Oxygen Sensor (HO2S) Heater Circuit High Voltage Bank 1 Sensor 1Learn More
O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)Learn More
Cooling Fan Rationality Check MalfunctionLearn More
Knock Sensor 1 Circuit High Input (Bank 2 or Single Sensor)Learn More
Idle Control System RPM lower Than ExpectedLearn More
System Voltage MalfunctionLearn More
Crankshaft Position Sensor A Circuit Range/PerformanceLearn More
Evaporative Emission Control System Leak DetectedLearn More
Evaporative Emission System Control Valve Low/No FlowLearn More
Misfire Detected - Rough Road Data Not AvailableLearn More
Low A/C Cycling PeriodLearn More
Code Word UnregesteredLearn More
Intake air flap control actuator – circuit malfunctionLearn More
Exhaust Gas Recirculation Valve Insufficient LiftLearn More
Idle Air Control Underspeed ErrorLearn More
TFT Sensor In Range Failure HighLearn More
Intake Manifold Runner Control (IMRC )Learn More
HO2S Insufficient Switching Sensor 1Learn More
Illuminated Entry Input Open CircuitLearn More
Evaporative Check Solenoid Circuit MalfunctionLearn More
Crankshaft Position Camshaft Position Correlation Bank 2 Sensor ALearn More
Lost Communication With Body Control ModuleLearn More
SCP (J1850) Invalid or Missing Data for Interior Lamp OutageLearn More
SCP (J1850) Invalid or Missing Data for Seat Motion / ControlLearn More
HO2S Insufficient Switching Bank 2 Sensor 1Learn More
Transmission control valve solenoids -ground circuit malfunctionLearn More
EEPROM MalfunctionLearn More
- Manufacturer: Subaru
About the Forester
The Forester first made its debut back in 1997. Since then, a total of five generations have been unveiled. The latest of these hit the markets in 2018.
The model, like a number of Subaru offerings, has seen intermittent praise over the years. Some of the most notable of its accolades include the 2009 and 2014 Motor Trend SUV of the Year.
The compact crossover SUV has faced a number of competitors over the years, mainly from other Japanese manufacturers. The most notable of these include the Honda CR-V, Mazda CX-30, and Volkswagen Tiguan.
The most common issue that the model has faced over the years is fault code P0420. This code indicates that there is a problem with the catalytic converter.
There are a number of things that should be done when addressing this issue. The oxygen sensors near the catalytic converter should be checked for any issues and the exhaust should also be checked for leaks, particularly upstream of the converter. In some cases, the converter needs to be replaced.
Another common code is P0700, which relates to the transmission control system. This is a ambiguous code that typically needs a higher-quality code scanner to pick up the cause of the issue.
This code may commonly pop up after changing automatic transmission fluid, which can be a clear indicator that there is a problem with the fluid.
Fault code P0028 is another code that the Forester has faced fairly often. This code is logged when a problem has been detected with the intake valve control solenoid for the second bank of the engine.
One of the most common causes that owners have reported is dirty or old engine oil. The addition of engine cleaners has proved to be fairly successful in many cases.