Subaru Car 1998-05

3.3L H6 VIN 8 Auto 1

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3.3L H6 VIN 8 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: P0133



O2 Sensor Circuit Slow Response Bank 1 Sensor 1

Possible Causes:



Check any other DTC on display
 
Check exhaust system
 

Trouble Code: P0135



Front Oxygen Sensor 1 (RH) Heater Circuit Malfunction

Possible Causes:



Check any other DTC on display (P0141 and P0147)
 
Using a scan tool, check current data
 
Check output signal from ECM
 
Check front oxygen sensor 1 (RH)
 

Trouble Code: P0136



Rear Oxygen Sensor Circuit Malfunction

Possible Causes:



Using a scan tool, check current data
 
Check the harness between the rear sensor and the ECM connector
 
Check the exhaust system
 

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: P0142



Front Oxygen Sensor 2 (LH) Circuit Malfunction

Possible Causes:



Check for other causes affecting exhaust gas
 
Check the front sensor 2 (LH)
 
Check Harness between the front oxygen sensor 2 (JH) and the ECM connector
 

Trouble Code: P0145



Front Oxygen Sensor 2 (LH) Circuit Slow Response

Possible Causes:



Check for DTC P0142
 
Check exhaust system
 

Trouble Code: P0147



Front Oxygen Sensor 2 (LH) Heater Circuit Malfunction

Possible Causes:



Using a scan tool, check current data
 
Check the output signal from the ECM
 
Check the power supply to the front oxygen sensor 2 (LH)
 
Check the 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: P0205



Fuel Injector Circuit Malfunction No. 5

Possible Causes:



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

Trouble Code: P0206



Fuel Injector Circuit Malfunction No. 6

Possible Causes:



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

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Check any other DTC on display
 
Check output signal of ECM
 
Check harness between injector and ECM connector
 
Check fuel injector
 
Check power supply line
 
Check power supply to mass air flow sensor
 
Check harness between ECM and sensor connector
 
Check installation of camshaft and crankshaft sensors
 
Check crank plate
 
Check condition of timing chain
 
Check fuel level
 
Check status of MIL light
 
Check air intake system
 
Check cause of misfire (engine running)
 
Check engine condition
 
Check all cylinders individually, in pairs, in groups and at random
 

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: P0330



Knock Sensor 2 Circuit Malfunction

Possible Causes:



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

Trouble Code: P0335



Crankshaft Position Sensor -A- Circuit

Possible Causes:



Check harness between the sensor and the ECM connector
 
Check condition of the sensor
 
Check the sensor
 

Trouble Code: P0336



Crankshaft Position Sensor -A- Circuit range/Performance

Possible Causes:



Check any other DTC on display
 
Check condition of the sensor
 
Check the crankshaft plate
 
Check timing chain
 

Trouble Code: P0340



Camshaft Position Sensor -A- Circuit Bank 1 or Single Sensor

Possible Causes:



Check any other DTC on display
 
Check power supply
 
Check harness between sensor connector and ECM
 
Check sensor installation and condition
 
Check the sensor
 
Check for poor contact
 

Trouble Code: P0400



Exhaust Gas Recirculation Flow Malfunction

Possible Causes:



Check any other DTC on display
 
Check EGR control solenoid valve circuit
 
Check vacuum line
 
Check EGR system
 

Trouble Code: P0420



Catalyst System Efficiency Below Threshold Bank 1

Possible Causes:



Check any other DTC on display
 
Check harness between ECM and rear oxygen sensor connector
 
Check exhaust system
 

Trouble Code: P0441



Evaporative Emission Control System Indirect Purge Flow

Possible Causes:



Check any other DTC on display
 
Check purge control valve solenoid operation
 
Check purge control valve
 

Trouble Code: P0443



Evaporative Emission Control System Purge Control Valve Circuit Low Input

Possible Causes:



Check output signal from ECM
 
Check harness between purge control solenoid valve and ECM connector
 
Check the purge control solenoid valve
 
Check power supply to purge control solenoid valve
 
Check evaporative emission control system line
 
Check poor contact
 

Trouble Code: P0500



Vehicle Speed Sensor

Possible Causes:



Check DTC of VDC
 

Trouble Code: P0505



Idle Control System Malfunction

Possible Causes:



Check air intake system
 
Check output signal from ECM
 
Check idle air control solenoid valve
 
Check harness between ECM and idle air control solenoid valve connector
 

Trouble Code: P0506



Idle Control System RPM Lower Than Expected

Possible Causes:



Check any other DTC on display
 
Check air cleaner element
 
Check electronic throttle control
 

Trouble Code: P0507



Idle Control System RPM Higher Than Expected

Possible Causes:



Check any other DTC on display
 
Check air intake system
 
Check electronic throttle control
 

Trouble Code: P0600



Serial Communication Link

Possible Causes:



Check engine start failure (does engine run)
 
Check illumination of MIL light
 
Check indication of DTC on display
 
Using the a scan tool, perform diagnosis
 

 
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