Subaru Car 1998-05

1.8L H4 VIN 2 Auto

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1.8L H4 VIN 2 Auto

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
 

Trouble Code: P0125



Insufficient Coolant Temperature For Closed loop Fuel Control

Possible Causes:



Check any other DTC on display
 
Check tire size
 
Check engine coolant
 
Check thermostat
 

Trouble Code: P0130



O2 Sensor Circuit Bank 1 Sensor 1

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 
Check harness between ECM and sensor
 
Check exhaust system
 

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: P0141



Rear Oxygen Sensor Heater Circuit Malfunction

Possible Causes:



Check output signal from ECM
 
Check power supply to sensor
 
Check sensor
 

Trouble Code: P0170



Fuel Trim Malfunction

Possible Causes:



Check exhaust system
 
Check air intake system
 
Check fuel pressure
 
Check engine coolant
 
Check mass air flow sensor
 

Trouble Code: P0201



Fuel Injector Circuit Malfunction No. 1

Possible Causes:



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

Trouble Code: P0202



Fuel Injector Circuit Malfunction No. 2

Possible Causes:



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

Trouble Code: P0203



Fuel Injector Circuit Malfunction No. 3

Possible Causes:



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

Trouble Code: P0204



Fuel Injector Circuit Malfunction No. 4

Possible Causes:



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

Trouble Code: P0325



Knock Sensor 1 Circuit Malfunction

Possible Causes:



Check harness between knock sensor 1 and ECM connector
 
Check sensor
 
Check input signal of ECM
 

Trouble Code: P0725



Engine Speed Input Circuit Malfunction

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P1502



Radiator Fan Function Problem

Possible Causes:



Check any other DTC on display
 

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
 

 
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