Subaru Car 1998-05

2.5L H4 VIN 6 Std 4

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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: 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: P1505



Idle Control System Circuit High Input

Possible Causes:



Check throttle cable
 
Check output signal from ECM
 

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 #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 #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 #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 #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 #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 #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 #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 #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: 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: 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: 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: P0107



Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

Possible Causes:



Using a scan tool, check current data
 
Check poor contact
 
Check output signal of ECM
 
Check input signal of ECM
 
Check harness between ECM and sensor connector
 

Trouble Code: P0108



Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

Possible Causes:



Check output signal of ECM
 
Check input signal of ECM
 
Check harness between ECM and sensor connector
 
Check harness between the sensor connector
 
Check poor contact
 

Trouble Code: P0171



System Too Lean Bank 1

Possible Causes:



Check any other DTC on display
 
Check exhaust system
 
Check air intake system
 
Check fuel pressure
 
Check fuel injector
 
Check coolant temperature
 
Check intake manifold pressure sensor
 
Check intake air temperature sensor
 

Trouble Code: P0172



System Too Rich Bank 1

Possible Causes:



Check any other DTC on display
 
Check exhaust system
 
Check air intake system
 
Check fuel pressure
 
Check fuel injector
 
Check coolant temperature
 
Check intake manifold pressure sensor
 
Check intake air temperature sensor
 

Trouble Code: P0261



Fuel Injector Circuit Low Input No. 1

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 

Trouble Code: P0262



Fuel Injector Circuit High Input No. 1

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0264



Fuel Injector Circuit Low Input No. 2

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 

Trouble Code: P0265



Fuel Injector Circuit High Input No. 2

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0267



Fuel Injector Circuit Low Input No. 3

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 

Trouble Code: P0268



Fuel Injector Circuit High Input No. 3

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0270



Fuel Injector Circuit Low Input No. 4

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 

Trouble Code: P0271



Fuel Injector Circuit High Input No. 4

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0410



Secondary Air Injection System

Possible Causes:



Check air pump operation
 
Check duct between pump and combination valve
 
Check power supply to pump
 
Check harness between pump relay and pump connector
 
Check pump relay
 
Check pump relay power source
 
Check harness between ECM and pump relay connector
 

Trouble Code: P0451



Evaporative Emission Control System Pressure Sensor Malfunction

Possible Causes:



Check any other DTC on display
 
Check fuel filler cap
 
Check pressure vacuum line
 

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: P1502



Radiator Fan Function Problem

Possible Causes:



Check any other DTC on display
 

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
 

 
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