Subaru Car 1998-05

3.0L H6 - Std 4

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Trouble Code: P1140



Bank 2 and Sensor 1 Oxygen Sensor (front left) Heater Circuit Range/ Performance Problem

Possible Causes:



Check harness between ECM and sensor connector
 
Check front sensor
 
Check poor contact
 

Trouble Code: P1146



Pressure Sensor Circuit range/Performance Problem (high input)

Possible Causes:



Check any other DTC on display
 
Check air intake system
 
Check pressure sensor
 
Check throttle position
 

Trouble Code: P1152



Bank 1 and Sensor 2 Oxygen Sensor (front right) Circuit Range/Performance Problem Low Input

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 
Check rear sensor signal
 
Check exhaust system
 

Trouble Code: P1153



Bank 1 and Sensor 1 Oxygen Sensor (front right) Circuit Range/Performance Problem High Input

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 
Check rear sensor signal
 
Check exhaust system
 

Trouble Code: P1154



Bank 1 and Sensor 1 Oxygen Sensor (front left) Circuit Range/Performance Problem low Input

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 
Check rear sensor signal
 
Check exhaust system
 

Trouble Code: P1155



Bank 2 and Sensor 1 Oxygen Sensor (front left) Circuit Range/Performance Problem High Input

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 
Check rear sensor signal
 
Check exhaust system
 

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: 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: 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: P1507



Idle Control System Malfunction (fail safe)

Possible Causes:



Check any other DTC on display
 
Check air intake system
 

Trouble Code: P1518



Starter Switch Circuit Low Input

Possible Causes:



Check operation of starter motor
 

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: P1590



Neutral Position Switch Circuit High Output

Possible Causes:



Check any other DTC on display
 
Check input signal of ECM
 
Check poor contact
 
Check harness between ECM and inhibitor switch connector
 
Check switch ground
 
Check switch
 
Check selector cable connection
 

Trouble Code: P1591



Neutral Position Switch Circuit Low Output

Possible Causes:



Check any other DTC on display
 
Check input signal of ECM
 
Check harness between ECM and transmission harness connector
 
Check switch
 
Check selector cable connection
 

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: P1711



Engine Torque Control Signal #1 Circuit Malfunction

Possible Causes:



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

Trouble Code: P1712



Engine Torque Control Signal #2 Circuit Malfunction

Possible Causes:



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

Trouble Code: P2138



Throttle/Pedal Position Sensor/Switch -D-/-E- Voltage Rationality

Possible Causes:



Check accelerator pedal position sensor output
 
Check poor contact
 
Check harness between ECM and sensor
 
Check sensor
 
Check sensor output
 

Trouble Code: P2227



Barometric Pressure Circuit Range/Performance

Possible Causes:



Check any other DTC on display
 

Trouble Code: P2228



Barometric Pressure Circuit Low Input

Possible Causes:



Check any other DTC on display
 

Trouble Code: P2229



Barometric Pressure Circuit High Input

Possible Causes:



Check any other DTC on display
 

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: P0139



O2 Sensor Circuit High Voltage Bank 1 Sensor 2

Possible Causes:



Check any other DTC on display
 
Check Harness between ECM and rear oxygen sensor connector
 
Check sensor
 

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: P0175



System Too rich Bank 1

Possible Causes:



Check any other DTC on display
 
Check exhaust system
 
Check air intake system
 

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: 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
 

Trouble Code: P1712



Engine Torque Control Signal No. 2 Circuit Malfunction

Possible Causes:



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

 
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