Trouble Code Definition

OBD TROUBLE CODE IDENTIFICATION CHART - 1.8L

Code	Circuit Affected	Probable Cause
11	Crankshaft Position Sensor	No Reference Signal
12	Starter Switch	Switch/Wiring Defective
13	Camshaft Position Sensor	Open/Short Circuit Or Defective Sensor
14	Fuel Injector No 1	Injector/Harness Defective
15	Fuel Injector No 2	Injector/Harness Defective
16	Fuel Injector No 3	Injector/Harness Defective
17	Fuel Injector No 4	Injector/Harness Defective
21	Coolant Temperature Sensor	Open/Short Circuit Or Defective Sensor
23	Mass Airflow Sensor	Open/Short Circuit Or Defective Sensor
24	Idle Air Control Solenoid Valve	Open/Short Circuit Or Defective Solenoid
31	Throttle Position Sensor	Open/Short Circuit Or Defective Sensor
32	Oxygen Sensor (O2S)	Open/Short Circuit Or Defective Sensor
33	Vehicle Speed Sensor No 2	Open/Short Circuit Or Defective Sensor
34	EGR Solenoid Valve	Open/Short Circuit Or Defective Solenoid
35	Purge Control Solenoid Valve	Open/Short Circuit Or Defective Solenoid
36	Air Suction Solenoid Valve	Open/Short Circuit Or Defective Valve
41	Air/Fuel Learning Control	Faulty Lean Control Function
51	Neutral Position Switch (M/T)	Open/Short Circuit Or Defective Switch
51	Inhibitor Switch (A/T)	Open/Short, Cable Adjust, Or Def Switch
55	Recirculation Gas Temp. Sensor	Open/Short Circuit Or Defective Sensor
56	EGR System	Faulty EGR System Function
61	Fuel Tank Pressure Control Solenoid Valve (California FWD Model Only)	Control Solenoid Valve Malfunction Or Short Or Open In Harness
62	Fuel Temperature Sensor (Calif FWD Only)	Short Or Open In Harness
63	Fuel Tank Pressure Sensor (Calif FWD Only)	Short Or Open In Harness

OBD II DIAGNOSTIC TROUBLE CODE IDENTIFICATION CHART - 2.2L

Code

SSM Title ⁽¹⁾

Circuit Affected

Probable Cause

P0100

Airflow Sensor Circuit

Open/Short Circuit

P0101

QA-R

Airflow Sensor Circuit Range/Performance Problem

Bad Sensor

P0105

P-S

Pressure Sensor Circuit Malfunction

Open/Short Circuit

P0106

P-R

Pressure Sensor Range/ Performance

Bad Sensor

P0115

Coolant Temperature Sensor Circuit Malfunction

Open/Short Circuit

P0120

THV

Throttle Position Sensor Circuit Malfunction

Open/Short Circuit

P0121

TH-R

Throttle Position Sensor Range/Performance

Bad Sensor

P0125

TW-CL

Coolant Temp Too Low For Closed Loop Control

Bad Sensor

P0130

FO2-V

Front O2 Sensor Circuit Malfunction

Bad Sensor, Bad Fuel

P0133

FO2-R

Front O2 Sensor Circuit Slow Response

Bad Sensor, Bad Fuel

P0135

FO2H

Front O2 Sensor Heater Circuit Malfunction

Open/Short Circuit

P0136

RO2-V

Rear O2 Sensor Circuit Malfunction

Bad Sensor, Bad Fuel

P0139

RO2-R

Rear O2 Sensor Circuit Slow Response

Bad Sensor, Bad Fuel

P0141

RO2H

Rear O2 Sensor Heater Circuit Malfunction

Open/Short Circuit

P0170

FUEL

Fuel Trim Malfunction

Any Part Of Fuel System

P0201

INJ1

Fuel Injector No 1

Inoperative Fuel Injector

P0202

INJ2

Fuel Injector No 2

Inoperative Fuel Injector

P0203

INJ3

Fuel Injector No 3

Inoperative Fuel Injector

P0204

INJ4

Fuel Injector No 4

Inoperative Fuel Injector

P0301

MIS-1

Cylinder 1 Misfire Detected

Bad Igniter

P0302

MIS-2

Cylinder 2 Misfire Detected

Bad Igniter

P0303

MIS-3

Cylinder 3 Misfire Detected

Bad Igniter

P0304

MIS-4

Cylinder 4 Misfire Detected

Bad Igniter

P0325

KNOCK

Knock Sensor Circuit Malfunction

Open/Short Circuit

P0335

CRANK

Crankshaft Position Sensor

Open/Short Circuit, Bad Sensor

P0340

CAM

Camshaft Position Sensor

Open/Short Circuit, Bad Sensor

P0400

EGR

EGR Flow

Faulty EGR Sys. Function

P0403

EGRSOL

EGR Circuit

EGR System Malfunction

P0420

CAT

CAT Efficiency Below Threshold

Bad CAT, Bad Fuel Control

P0441

CPC-F

Incorrect EVAP Purge Flow

Bad Purge Control Solenoid Valve

P0443

CPC

EVAP Circuit Malfunction

Open/Short Circuit

P0500

VSP

Vehicle Speed Sensor

Bad Sensor

P0505

ISC

Idle Control System

Open/Short Circuit, Bad Idle Solenoid

P0506

ISC-L

Idle RPM Too Low

Bad Idle Solenoid, Air By-Pass

P0507

ISC-H

Idle Too High

Idle Solenoid, Air Leaks

P0600

N/A

Serial Communication Link Malfunction

Open/Short Circuit

P0601

RAM

Memory Check Error

ECM

P0703 ⁽²⁾

BRK

Brake Switch Input Malfunction

Faulty Switch, Open/ Short Circuit

P0705 ⁽²⁾

RNG

Transmission Range Sensor Circuit Malfunction

Inhibitor Switch

P0710 ⁽²⁾

ATF

Transmission Fluid Temp. Sensor Circuit Malfunction

ATF Temperature Sensor, Open/Short Circuit

P0720 ⁽²⁾

ATVSP

Output Speed Sensor (VSS No. 1) Circuit Malfunction

VSS No. 1 Failure

P0725 ⁽²⁾

ATNE

Engine Speed Input Circuit Malfunction

TCM, TCM-To-ECM Wiring

P0731 ⁽²⁾

GR_1

Gear 1 Incorrect Ratio

N/A

P0732 ⁽²⁾

GR_2

Gear 2 Incorrect Ratio

N/A

P0733⁽²⁾

GR_3

Gear 3 Incorrect Ratio

N/A

P0734 ⁽²⁾

GR_4

Gear 4 Incorrect Ratio

N/A

P0740⁽²⁾

LU_F

Torque Converter Clutch System Malfunction

Duty Solenoid, VSS, Sensor Circuits

P0743⁽²⁾

Torque Converter Clutch System Circuit

Duty Solenoid B

P0748 ⁽²⁾

Pressure Control Solenoid Circuit

Duty Solenoid A

P0753⁽²⁾

SFT1

Shift Solenoid "A" Circuit

Shift Solenoid "A"

P0758 ⁽²⁾

SFT2

Shift Solenoid "B" Circuit

Shift Solenoid "B"

P0760⁽²⁾

OVR_F

Shift Solenoid "C" Malfunction

Shift Solenoid "C"

P0763 ⁽²⁾

OVR

Shift Solenoid "C" Circuit

Shift Solnoid "C" Circuit

P1100

ST_SW

Starter Switch Circuit Malfunction

Starter Motor

P1101

N_SW

Neutral Position Switch Circuit Problem (A/T & M/T)

Inhibitor Switch

P1102 ⁽²⁾

Pressure Sources Switching Solenoid Valve Circuit Malfunction

Solenoid Valve Circuit

P1103 ⁽²⁾

TRQ

Engine Torque Control Signal Circuit Malfunction

ECM-To-TCM Harness

P1500

FAN_1

Cooling Fan No. 1 Circuit Malfunction

Fan Relays

P1502

FAN_F

Cooling Fan Function Problem

Fan Function, Overheating

P1700

ATTH

TP Sensor Circuit Malfunction (A/T)

Throttle Position Sensor - A/T models only.

P1701 ⁽²⁾

CRS

Cruise Control Set Signal Circuit Malfunction (A/T)

TCM-To-CCM Circuit

P1702 ⁽²⁾

ATDIAG

A/T Diagnosis Input Signal Circuit Malfunction

TCM-To-ECM Harness

⁽¹⁾	When using Subaru Select Monitor (SSM).

⁽²⁾	Covered in entirety in appropriate TRANSMISSION SERVICE article.