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Subaru Legacy Fault Codes

You can find common Subaru Legacy 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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Subaru Legacy 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 Legacy has any recall notices on our sister site AutoRecalls.co, sorted by model year.

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Common Legacy Fault Codes

These are the most common Legacy fault codes that people are searching for.

Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Severity Icon 9/10

Error Icon P0700

Transmission Control System Malfunction

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Error Icon P0028

Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)

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Severity Icon 6/10

Error Icon P0026

Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)

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Error Icon P0971

Pressure Control Solenoid C Control Circuit High

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Severity Icon 4/10

Error Icon P0031

Heated Oxygen Sensor (HO2S) Heater Circuit Low Voltage Bank 1 Sensor 1

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Severity Icon 4/10

Error Icon P0455

System Gross Leak Evaporative Emission

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Severity Icon 8/10

Error Icon P0301

Cylinder 1 Misfire Detected

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Error Icon P0500

Vehicle Speed Sensor Malfunction

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Severity Icon 8/10

Error Icon P0340

Camshaft Position Sensor Circuit Malfunction

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Severity Icon 5/10

Error Icon P0172

System Too Rich (Bank 1)

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Severity Icon 7/10

Error Icon P2096

Post Catalyst Fuel Trim System Too Lean Bank 1

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Severity Icon 9/10

Error Icon P0300

Random/Multiple Cylinder Misfire Detected

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Error Icon P0108

Manifold Absolute Pressure/Barometric Pressure Circuit High Input

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Error Icon P0117

Engine Coolant Temperature Circuit Low Input

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Severity Icon 8/10

Error Icon P0841

Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance

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Severity Icon 8/10

Error Icon P0303

Cylinder 3 Misfire Detected

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Severity Icon 8/10

Error Icon P0304

Cylinder 4 Misfire Detected

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Severity Icon 8/10

Error Icon P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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Error Icon P1518

Intake Manifold Runner Control (Stuck Open)

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Error Icon P1153

HO2S Insufficient Switching Bank 2 Sensor 1

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Error Icon P1410

Intake air flap control actuator – circuit malfunction

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Error Icon P1710

Transmission control valve solenoids -ground circuit malfunction

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Error Icon P1718

TFT Sensor In Range Failure High

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Error Icon P1469

Low A/C Cycling Period

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Error Icon P1507

Idle Air Control Underspeed Error

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Error Icon P1574

Throttle Position Sensor Disagreement btwn Sensors

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Error Icon P1604

Code Word Unregestered

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Severity Icon 9/10

Error Icon P0011

Intake Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 9/10

Error Icon P2138

Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation

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Error Icon P1101

MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted

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Severity Icon 6/10

Error Icon P0174

System Too Lean (Bank 2)

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Severity Icon 3/10

Error Icon P0440

Evaporative Emission Control System Malfunction

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Severity Icon 8/10

Error Icon P0113

Intake Air Temperature Circuit High Input

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Error Icon B1608

Illuminated Entry Input Open Circuit

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Error Icon P1449

Evaporative Check Solenoid Circuit Malfunction

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Error Icon P0018

Crankshaft Position Camshaft Position Correlation Bank 2 Sensor A

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Error Icon U0140

Lost Communication With Body Control Module

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Severity Icon 9/10

Error Icon U0073

Control Module Communication Bus "A" Off

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Error Icon U1221

SCP (J1850) Invalid or Missing Data for Interior Lamp Outage

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Error Icon U1201

SCP (J1850) Invalid or Missing Data for Seat Motion / Control

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Error Icon P1443

Evaporative Emission System Control Valve Low/No Flow

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Error Icon P1491

Exhaust Gas Recirculation Valve Insufficient Lift

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Error Icon P1603

EEPROM Malfunction

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Severity Icon 7/10

Error Icon P0010

Intake Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 9/10

Error Icon P0012

Intake Camshaft Position Timing - Over-Retarded (Bank 1)

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Severity Icon 7/10

Error Icon P0013

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 8/10

Error Icon P0014

Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 8/10

Error Icon P0016

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A

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Severity Icon 8/10

Error Icon P0017

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

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Severity Icon 4/10

Error Icon P0036

Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2

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Severity Icon 4/10

Error Icon P0102

Mass or Volume Air Flow Circuit Low Voltage Input

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Severity Icon 4/10

Error Icon P0128

Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

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Severity Icon 6/10

Error Icon P0131

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)

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Severity Icon 7/10

Error Icon P0134

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

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Severity Icon 6/10

Error Icon P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

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Severity Icon 4/10

Error Icon P0137

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

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Severity Icon 6/10

Error Icon P0138

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

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Severity Icon 6/10

Error Icon P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

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Severity Icon 5/10

Error Icon P0175

System Too Rich (Bank 2)

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Severity Icon 8/10

Error Icon P0302

Cylinder 2 Misfire Detected

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Severity Icon 8/10

Error Icon P0305

Cylinder 5 Misfire Detected

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Severity Icon 8/10

Error Icon P0306

Cylinder 6 Misfire Detected

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Severity Icon 3/10

Error Icon P0325

Knock Sensor 1 Circuit (Bank 2 or Single Sensor)

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Severity Icon 8/10

Error Icon P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

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Severity Icon 8/10

Error Icon P0335

Crankshaft Position Sensor A Circuit Malfunction

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Severity Icon 6/10

Error Icon P0341

Camshaft Position Sensor Circuit Range/Performance

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Severity Icon 7/10

Error Icon P0401

Exhaust Gas Recirculation Flow Insufficient Detected

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Severity Icon 7/10

Error Icon P0430

Catalyst System Efficiency Below Threshold (Bank 2)

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Severity Icon 3/10

Error Icon P0441

Evaporative Emission Control System Incorrect Purge flow

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Severity Icon 3/10

Error Icon P0442

Evaporative Emission Control System Leak Detected

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Severity Icon 3/10

Error Icon P0446

Evaporative Emission Control System Vent Control Circuit Malfunction

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Severity Icon 4/10

Error Icon P0449

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

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Severity Icon 5/10

Error Icon P0463

Fuel Level Sensor Circuit High Input

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About the Legacy