Subaru Forester 1998-05

2.5L H4 VIN 6 Std 5

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Trouble Code: P1207



Air Assist Injector Solenoid Valve Circuit Low Input

Possible Causes:



Check output signal from ECM
 
Check power supply to valve
 
Check harness between ECM and valve connector
 
Check poor contact
 

Trouble Code: P1208



Air Assist Injector Solenoid Valve Circuit high Input

Possible Causes:



Check output signal from ECM
 

Trouble Code: P1301



Misfire Detected (high temperature exhaust gas)

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 

Trouble Code: P1312



Exhaust Gas Temperature Sensor malfunction

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 

Trouble Code: P1325



Knock Sensor Circuit Low Input

Possible Causes:



Check harness between sensor and ECM connector
 
Check sensor
 
Check sensor installation
 
Check input signal for ECM
 

Trouble Code: P1400



Fuel Tank Pressure Control Solenoid Valve Circuit Low

Possible Causes:



Check output signal of ECM
 
Check poor contact
 
Check harness between valve and ECM connector
 
Check valve
 
Check power supply to valve
 

Trouble Code: P1420



Fuel Tank Pressure Control Solenoid Valve Circuit High

Possible Causes:



Check input signal of ECM
 
Check poor contact
 
Check ground circuit fuel level sensor
 
Check harness between valve and ECM connector
 
Check harness between combination meter and fuel pump connector
 
Check valve
 

Trouble Code: P1421



Exhaust Gas Recirculation Circuit High Input

Possible Causes:



Check output signal of ECM
 
Check poor contact
 
Check harness between EGR solenoid and ECM connector
 
Check EGR solenoid valve
 

Trouble Code: P1422



Evaporative Emission Control System Purge Control Valve Circuit High Input

Possible Causes:



Check output signal of ECM
 
Check poor contact
 
Check harness between purge control solenoid and ECM connector
 
Check purge control solenoid valve
 

Trouble Code: P1423



Evaporative Emission Control System Vent Control High Input

Possible Causes:



Check output signal of ECM
 
Check poor contact
 
Check harness between vent control solenoid valve and ECM connector
 
Check vent control solenoid valve
 

Trouble Code: P1440



Fuel Tank Pressure Control System Function Problem (low input)

Possible Causes:



Check fuel tank pressure control solenoid valve
 
Check fuel filler cap
 
Check fuel filler pipe seal
 
Check vent control solenoid valve
 
Check purge control solenoid valve
 

Trouble Code: P1441



Fuel Tank Pressure Control System Function Problem (high input)

Possible Causes:



Check fuel tank pressure control solenoid valve
 
Check fuel filler cap
 
Check fuel filler pipe seal
 
Check vent control solenoid valve
 
Check purge control solenoid valve
 
Check canister
 
Check fuel tank
 
Check for other mechanical problems
 

Trouble Code: P1442



Fuel level Sensor Circuit Range/Performance Problem 2

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1443



Vent Control Solenoid Valve Function Problem

Possible Causes:



Check any other DTC on display
 
Check vent line hoses
 
Check drain valve operation
 

Trouble Code: P1445



Air Assist Injector Solenoid Valve malfunction

Possible Causes:



Check any other DTC on display
 
Check air assist injector solenoid valve operation
 
Check air by passes hoses
 
Check fuel injector
 

Trouble Code: P1446



Fuel Tank Sensor Control Valve Circuit Low

Possible Causes:



Check output signal from ECM
 
Check poor contact
 
Check harness between fuel tank sensor control valve and ECM connector
 
Check fuel tank sensor control valve
 
Check power supply to fuel tank sensor control valve
 

Trouble Code: P1447



Fuel Tank Sensor Control Valve Circuit High

Possible Causes:



Check output signal from ECM
 
Check poor contact
 
Check harness between fuel tank sensor control valve and ECM connector
 
Check fuel tank sensor control valve
 

Trouble Code: P1448



Fuel Tank Sensor Control Valve Range/Performance

Possible Causes:



Check for other DTC on display
 
Check fuel filler cap
 
Check evaporative emission line
 

Trouble Code: P1480



Cooling Fan Relay 1 Circuit High Input

Possible Causes:



Using a scan tool, check current data
 
Check for short circuit in radiator fan relay control circuit
 
Check main fan relay
 
Check sub fan relay
 
Check poor contact
 

Trouble Code: P1490



Thermostat Malfunction

Possible Causes:



Check vehicle condition
 
Check other DTC on display
 
Check engine coolant
 
Check radiator fan
 

Trouble Code: P1500



Radiator Fan Relay 1 Circuit malfunction (fan 1)

Possible Causes:



Check any other DTC on display
 
Check output signal from ECM
 
Check power supply line for relays
 
Check main fan relay 1 and sub fan relay
 
Check for open circuit in radiator fan relay 1 control circuit
 

Trouble Code: P1502



Radiator Fan Function problem

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1507



Idle Control System Malfunction (fail safe)

Possible Causes:



Check any other DTC on display
 
Check air intake system
 

Trouble Code: P1510



ISC Solenoid Valve Signal No. 1 Circuit Malfunction (low input)

Possible Causes:



Check power supply to idle air control solenoid valve
 
Check harness between ECM and idle control solenoid valve connector
 
Check poor contact
 

Trouble Code: P1511



ISC Solenoid Valve Signal No. 1 Circuit Malfunction (high input)

Possible Causes:



Check any other DTC on display
 
Check ground circuit for ECM
 
Check harness between ECM and idle control solenoid valve connector
 

Trouble Code: P1512



ISC Solenoid Valve Signal No. 2 Circuit Malfunction (low input)

Possible Causes:



Check power supply to idle air control solenoid valve
 
Check harness between ECM and idle control solenoid valve connector
 
Check poor contact
 

Trouble Code: P1513



ISC Solenoid Valve Signal No. 2 Circuit Malfunction (high input)

Possible Causes:



Check any other DTC on display
 
Check ground circuit for ECM
 
Check harness between ECM and idle control solenoid valve connector
 

Trouble Code: P1514



ISC Solenoid Valve Signal No. 3 Circuit Malfunction (low input)

Possible Causes:



Check power supply to idle air control solenoid valve
 
Check harness between ECM and idle control solenoid valve connector
 
Check poor contact
 

Trouble Code: P1515



ISC Solenoid Valve Signal No. 3 Circuit Malfunction (high input)

Possible Causes:



Check any other DTC on display
 
Check ground circuit for ECM
 
Check harness between ECM and idle control solenoid valve connector
 

Trouble Code: P1516



ISC Solenoid Valve Signal No. 4 Circuit Malfunction (low input)

Possible Causes:



Check power supply to idle air control solenoid valve
 
Check harness between ECM and idle control solenoid valve connector
 
Check poor contact
 

Trouble Code: P1517



ISC Solenoid Valve Signal No. 4 Circuit Malfunction (high input)

Possible Causes:



Check any other DTC on display
 
Check ground circuit for ECM
 
Check harness between ECM and idle control solenoid valve connector
 

Trouble Code: P1518



Starter Switch Circuit Low Input

Possible Causes:



Check operation of starter motor
 

Trouble Code: P1520



Cooling Fan Relay 1 Circuit High Input

Possible Causes:



Check output signal of ECM
 
Check for short circuit in radiator fan relay control circuit
 
Check main fan relay
 
Check sub fan relay
 
Check poor contact
 

Trouble Code: P1544



Exhaust Gas Temperature Too High

Possible Causes:



Check any other DTC on display
 
Check exhaust system
 

Trouble Code: P1560



Back-Up Voltage Circuit Malfunction

Possible Causes:



Check input signal of ECM
 
Check harness between ECM and main fuse box connector
 
Check fuse number 13
 

Trouble Code: P1698



Engine Torque Control Cut Signal Circuit Malfunction (low input)

Possible Causes:



Check output signal for ECM
 
Check harness between ECM and TCM connector
 

Trouble Code: P1702



Automatic Transmission diagnosis Input Signal Circuit Malfunction

Possible Causes:



Check harness between TCM and CCM
 

Trouble Code: P1704



2-4 Brake Timing Control Solenoid Valve Circuit Malfunction

Possible Causes:



Check 2-4 brake timing control solenoid valve circuit
 

Trouble Code: P1705



2-4 Brake Pressure Control Solenoid Valve (duty solenoid -D-) Circuit Malfunction

Possible Causes:



Check 2-4 brake pressure control solenoid valve (duty solenoid -D-) circuit
 

Trouble Code: P1711



Engine Torque Control Signal No. 1 Circuit Malfunction

Possible Causes:



Check input signal for ECM
 
Check poor contact
 
Check harness between ECM and TCM connector
 

 
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