Subaru Impreza CEL Check Engine Light

Subaru Impreza Check Engine Light on? Here’s the list of Diagnostic Trouble Codes and What They Mean

check-engine-light Subaru Impreza Check Engine Light on?  Here's the list of Diagnostic Trouble Codes and What They Mean

If your Subaru Check Engine Light is on, its letting you know there’s an issue picked up by your Subaru’s sensors that needs fixing.

You can read the code and find out what’s causing it using a tool such as the OBLINK LX we sell https://scoobyparts.com/subaru-impreza-wrx-sti-performance-parts/diagnostic-tools/obdlinklx-bluetooth-diagnostic-obd2-tool it simply plugs into your diagnostic port, and connects to your Phone (not iOS), Tablet or PC via bluetooth. You can then use the list below to translate the code.

Please note that this tool is only compatible with the following UK/Euro Cars 2001 onwards, so not the GC8 classic models

2001-2002 Bugeye WRX, STI and Non Turbo
2003-2005 Blobeye WRX, STI and Non Turbo
2006-2007 Hawkeye WRX, STI and Non Turbo
2008-2012 Hatchback WRX, STI and Non-Turbo
2001 -2018 Legacy all models
2001- 2018 Forester, XV and Levorg all models
2013 – 2018 BRZ Models
Not compatible with JDM models
Not compatible with Classic Impreza or pre-2001 models.

You’ll hopefully find this useful -below is a list of Subaru engine diagnostic trouble codes otherwise known as CEL or MIL codes. This is a list from a 2006 Impreza UK Turbo, many of the codes will be identical on other models but some will be unique to this model.

Subaru WRX & STI CEL Codes (MY2006)

P0011 Intake Camshaft Position – Timing
Over-advanced or System Performance
(Bank 1)

P0016 Crankshaft Position – Camshaft Position
Correlation (Bank 1)

P0018 Crankshaft Position – Camshaft Position
Correlation (Bank 2)

P0021 Intake Camshaft Position – Timing
Over-advanced or System Performance
(Bank 2)

P0030 HO2S Heater Control Circuit (Bank 1
Sensor 1)

P0031 HO2S Heater Control Circuit Low
(Bank 1 Sensor 1)

P0032 HO2S Heater Control Circuit High
(Bank 1 Sensor 1)

P0037 HO2S Heater Control Circuit Low
(Bank 1 Sensor 2)

P0038 HO2S Heater Control Circuit High
(Bank 1 Sensor 2)

P0068 Manifold Absolute Pressure/Barometric
Pressure Circuit Range/Performance

P0101 Mass or Volume Air Flow Circuit
Range/Performance

P0102 Mass or Volume Air Flow Circuit Low
Input

P0103 Mass or Volume Air Flow Circuit High
Input

P0107 Manifold Absolute Pressure/Barometric
Pressure Circuit Low Input

P0108 Manifold Absolute Pressure/Barometric
Pressure Circuit High Input

P0111 Intake Air Temperature Circuit
Range/Performance

P0112 Intake Air Temperature Circuit Low
Input

P0113 Intake Air Temperature Circuit High
Input

P0117 Engine Coolant Temperature Circuit
Low Input

P0118 Engine Coolant Temperature Circuit
High Input

P0122 Throttle/Pedal Position Sensor/
Switch “A” Circuit Low Input

P0123 Throttle/Pedal Position Sensor/
Switch “A” Circuit High Input

P0125 Insufficient Coolant Temperature for
Closed Loop Fuel Control

P0126 Insufficient Coolant Temperature for
Stable Operation

P0128 Coolant Thermostat (Coolant Temperature
Below Thermostat Regulating
Temperature)

P0131 O2 Sensor Circuit Low Voltage (Bank
1 Sensor 1)

P0132 O2 Sensor Circuit High Voltage
(Bank 1 Sensor 1)

P0133 O2 Sensor Circuit Slow Response
(Bank 1 Sensor 1)

P0134 O2 Sensor Circuit No Activity
Detected (Bank 1 Sensor 1)

P0137 O2 Sensor Circuit Low Voltage (Bank
1 Sensor 2)

P0138 O2 Sensor Circuit High Voltage
(Bank 1 Sensor 2)

P0139 O2 Sensor Circuit Slow Response
(Bank 1 Sensor 2)

P0140 O2 Sensor Circuit No Activity
Detected (Bank 1 Sensor 2)

P0171 System Too Lean (Bank 1)

P0172 System Too Rich (Bank 1)

P0181 Fuel Temperature Sensor “A” Circuit
Range/Performance

P0182 Fuel Temperature Sensor “A” Circuit
Low Input

P0183 Fuel Temperature Sensor “A” Circuit
High Input

P0222 Throttle/Pedal Position Sensor/
Switch “B” Circuit Low

P0223 Throttle/Pedal Position Sensor/
Switch “B” Circuit High

P0230 Fuel Pump Primary Circuit

P0244 Turbo/Super Charger Wastegate
Solenoid “A” Range/Performance

P0245 Turbo/Super Charger Wastegate
Solenoid “A” Low

P0246 Turbo/Super Charger Wastegate
Solenoid “A” High

P0301 Cylinder 1 Misfire Detected

P0302 Cylinder 2 Misfire Detected

P0303 Cylinder 3 Misfire Detected

P0304 Cylinder 4 Misfire Detected

P0327 Knock Sensor 1 Circuit Low Input
(Bank 1 or Single Sensor)

P0328 Knock Sensor 1 Circuit High Input
(Bank 1 or Single Sensor)

P0335 Crankshaft Position Sensor “A” Circuit

P0336 Crankshaft Position Sensor “A” Circuit
Range/Performance

P0340 Camshaft Position Sensor “A” Circuit
(Bank 1 or Single Sensor)

P0345 Camshaft Position Sensor “A” Circuit
(Bank 2)

P0410 Secondary Air Injection System

P0411 Secondary Air Injection System
Incorrect Flow Detected

P0413 Secondary Air Injection System
Switching Valve “A” Circuit Open

P0414 Secondary Air Injection System
Switching Valve “A” Circuit Shorted

P0416 Secondary Air Injection System
Switching Valve “B” Circuit Open

P0417 Secondary Air Injection System
Switching Valve “B” Circuit Shorted

P0418 Secondary Air Injection System Control
“A” Circuit Open

P0420 Catalyst System Efficiency Below
Threshold (Bank 1)

P0442 Evaporative Emission Control System
Leak Detected (small leak)

P0447 Evaporative Emission Control System
Vent Control Circuit Open

P0448 Evaporative Emission Control System
Vent Control Circuit Shorted

P0451 Evaporative Emission Control System
Pressure Sensor Range/Performance

P0452 Evaporative Emission Control System
Pressure Sensor Low Input

P0453 Evaporative Emission Control System
Pressure Sensor High Input

P0456 Evaporative Emission Control System
Leak Detected (very small leak)

P0457 Evaporative Emission Control System
Leak Detected (fuel cap loose/
off)

P0458 Evaporative Emission Control System
Purge Control Valve Circuit Low

P0459 Evaporative Emission Control System
Purge Control Valve Circuit High

P0461 Fuel Level Sensor Circuit Range/Performance

P0462 Fuel Level Sensor Circuit Low Input

P0463 Fuel Level Sensor Circuit High Input

P0464 Fuel Level Sensor Circuit Intermittent

P0483 Cooling Fan Rationality Check

P0502 Vehicle Speed Sensor Circuit Low
Input

P0503 Vehicle Speed Sensor Intermittent/
Erratic/High

P0506 Idle Control System RPM Lower
Than Expected

P0507 Idle Control System RPM Higher
Than Expected

P0512 Starter Request Circuit

P0513 Incorrect Immobilizer Key

P0519 Idle Control System Malfunction
(Fail-Safe)

P0600 Serial Communication Link

P0604 Internal Control Module Random
Access Memory (RAM) Error

P0605 Internal Control Module Read Only
Memory (ROM) Error

P0607 Control Module Performance

P0638 Throttle Actuator Control Range/Performance
(Bank 1)

P0691 Cooling Fan 1 Control Circuit Low

P0692 Cooling Fan 1 Control Circuit High

P0700 Transmission Control System (MIL
Request)

P0851 Neutral Switch Input Circuit Low

P0852 Neutral Switch Input Circuit High

P1152 O2 Sensor Circuit Range/Performance
(Low) (Bank 1 Sensor 1)

P1153 O2 Sensor Circuit Range/Performance
(High) (Bank 1 Sensor 1)

P1160 Return Spring Failure

P1400 Fuel Tank Pressure Control Solenoid
Valve Circuit Low

P1410 Secondary Air Injection System
Switching Valve Stuck Open

P1418 Secondary Air Injection System Control
“A” Circuit Shorted

P1420 Fuel Tank Pressure Control Sol.
Valve Circuit High

P1443 Vent Control Solenoid Valve Function
Problem

P1491 Positive Crankcase Ventilation (Blowby)
Function Problem

P1518 Starter Switch Circuit Low Input

P1560 Back-Up Voltage Circuit Malfunction

P1570 Antenna

P1571 Reference Code Incompatibility

P1572 IMM Circuit Failure (Except Antenna
Circuit)

P1574 Key Communication Failure

P1576 EGI Control Module EEPROM

P1577 IMM Control Module EEPROM

P2004 Intake Manifold Runner Control
Stuck Open (Bank 1)

P2005 Intake Manifold Runner Control
Stuck Open (Bank 2)

P2006 Intake Manifold Runner Control
Stuck Closed (Bank 1)

P2007 Intake Manifold Runner Control
Stuck Closed (Bank 2)

P2008 Intake Manifold Runner Control Circuit
/ Open (Bank 1)

P2009 Intake Manifold Runner Control Circuit
Low (Bank 1)

P2011 Intake Manifold Runner Control Circuit
/ Open (Bank 2)

P2012 Intake Manifold Runner Control Circuit
Low (Bank 2)

P2016 Intake Manifold Runner Position Sensor
/ Switch Circuit Low (Bank 1)

P2017 Intake Manifold Runner Position Sensor
/ Switch Circuit High (Bank 1)

P2021 Intake Manifold Runner Position Sensor
/ Switch Circuit Low (Bank 2)

P2022 Intake Manifold Runner Position Sensor
/ Switch Circuit High (Bank 2)

P2088 OCV Solenoid Valve Signal A Circuit
Open (Bank 1)

P2089 OCV Solenoid Valve Signal A Circuit
Short (Bank 1)

P2092 OCV Solenoid Valve Signal A Circuit
Open (Bank 2)

P2093 Intake Camshaft Position Actuator
Control Circuit High (Bank 2)

P2096 Post Catalyst Fuel Trim System Too
Lean Bank 1

P2097 Post Catalyst Fuel Trim System Too
Rich Bank 1

P2101 Throttle Actuator Control Motor Circuit
Range/Performance

P2102 Throttle Actuator Control Motor Circuit
Low

P2103 Throttle Actuator Control Motor Circuit
High

P2109 Throttle/Pedal Position Sensor “A”
Minimum Stop Performance

P2122 Throttle/Pedal Position Sensor/
Switch “D” Circuit Low Input

P2123 Throttle/Pedal Position Sensor/
Switch “D” Circuit High Input

P2127 Throttle/Pedal Position Sensor/
Switch “E” Circuit Low Input

P2128 Throttle/Pedal Position Sensor/
Switch “E” Circuit High Input

P2135 Throttle/Pedal Position Sensor/
Switch “A”/“B” Voltage Correlation

P2138 Throttle/Pedal Position Sensor/
Switch “D”/“E” Voltage Correlation

P2227 Barometric Pressure Circuit Range/
performance

P2229 Barometric Pressure Circuit High
Input

P2431 Secondary Air Injection System Air
Flow/Pressure Sensor Circuit Range/
Performance

P2432 Secondary Air Injection System Air
Flow/Pressure Sensor Circuit Low

P2433 Secondary Air Injection System Air
Flow/Pressure Sensor Circuit High

P2440 Secondary Air Injection System
Switching Valve Stuck Open (Bank 1)

P2441 Secondary Air Injection System
Switching Valve Stuck Closed (Bank
1)

P2442 Secondary Air Injection System
Switching Valve Stuck Open (Bank 2)

P2443 Secondary Air Injection System
Switching Valve Stuck Closed (Bank
2)

P2444 Secondary Air Injection System
Pump Stuck On

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