Subaru Car 1998-05

2.2L H4 VIN 4 Auto 3

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Trouble Code: P1112



Atmospheric Pressure Sensor Circuit Range/Performance Problem

Possible Causes:



Check input signal for ECM
 
Check harness between ECM and pressure sensor connector
 
Check any other DTC on display
 
Check sensor filter
 
Using the a scan tool, check current data
 

Trouble Code: P1115



Engine Torque Control Cut Signal Circuit High Input

Possible Causes:



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

Trouble Code: P1116



Engine Torque Control Cut Signal Circuit Low Input

Possible Causes:



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

Trouble Code: P1120



Starter Circuit Switch High Input

Possible Causes:



Check operation of starter motor
 

Trouble Code: P1122



Pressure Sources Switching Solenoid Valve High Input

Possible Causes:



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

Trouble Code: P1130



Front Oxygen Sensor Circuit Malfunction

Possible Causes:



Check harness between ECM and sensor connector
 
Check poor contact
 

Trouble Code: P1131



Front Oxygen Sensor Circuit Malfunction (short circuit)

Possible Causes:



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

Trouble Code: P1132



Front Oxygen Sensor Heater Circuit Low Input

Possible Causes:



Check any other DTC on display
 
Check power supply circuit of ECM
 
Check ground circuit of ECM
 
Check power supply of front sensor
 
Check sensor
 

Trouble Code: P1133



Front Oxygen Sensor Heater Circuit High Input

Possible Causes:



Check output signal from ECM
 
Check sensor heater current
 

Trouble Code: P1134



Front Oxygen Sensor Micro Computer Problem

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1141



Mass Air Flow Sensor Circuit Range/Performance Problem (high output)

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1142



Throttle Position Sensor Circuit Range/Performance Problem (low input)

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1143



Pressure Sensor Circuit range/Performance Problem (low input)

Possible Causes:



Using a scan tool, check current data
 
Check pressure sensor
 

Trouble Code: P1144



Pressure Sensor Circuit range/Performance Problem (high input)

Possible Causes:



Using a scan tool, check current data
 

Trouble Code: P1151



Rear Oxygen Sensor Heater Circuit High Input

Possible Causes:



Check input signal for ECM
 
Check any other DTC on display
 

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: 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: P1700



Throttle Position Sensor Circuit Malfunction For Automatic Transmission

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 

Trouble Code: P1701



Cruise Control Set Signal Circuit Malfunction For Automatic Transmission

Possible Causes:



Check harness between TCM and CCM
 
Check input signal for TCM
 

Trouble Code: P1702



Automatic Transmission Diagnosis Input Signal Circuit Malfunction

Possible Causes:



Check harness between TCM and CCM
 

Trouble Code: P1703



Low Clutch Timing Control Solenoid Valve Circuit Malfunction

Possible Causes:



Check low clutch timing control solenoid valve circuit
 

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: P1722



Automatic Transmission Diagnosis Input Signal Circuit High Input

Possible Causes:



Check for identification circuit malfunction
 
Check harness between ECM and TCM connector
 
Check output signal for ECM
 
Check poor contact
 

Trouble Code: P1742



Automatic Transmission Diagnosis Input Signal Circuit Malfunction

Possible Causes:



Check for identification circuit malfunction
 
Check driving conditions (shift control pattern)
 
Check output signal for ECM
 
Check accessories (car phone, CB installation, etc)
 

Trouble Code: P0100



Mass Air Flow Circuit Malfunction

Possible Causes:



Check input signal for ECM
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 

Trouble Code: P0105



Pressure Sensor Circuit Malfunction

Possible Causes:



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

Trouble Code: P0115



Engine Coolant Temperature Sensor Malfunction

Possible Causes:



Check harness between sensor and ECM connector
 

Trouble Code: P0120



Throttle Position Sensor Circuit Malfunction

Possible Causes:



Check input signal of ECM
 
Check harness between ECM and sensor connector
 
Check harness between sensor and body connector
 

 
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