Subaru Car 1998-05

3.0L H6 - Auto 4

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Trouble Code: P0705



Transmission Range Sensor Circuit (PRNDL input)

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0710



Transmission Fluid Temperature Sensor

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0715



Torque Converter Turbine Speed Sensor Circuit Malfunction

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0716



Input/Turbine Speed Sensor Circuit Range/Performance

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0720



Output Speed Sensor Circuit

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0725



Engine Speed Input Circuit Malfunction

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0726



Engine Speed Input Circuit Range/Performance

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0731



Gear 1 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0732



Gear 2 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0733



Gear 3 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0734



Gear 4 Incorrect Ratio

Possible Causes:



Check any other DTC on display
 
Check throttle position sensor circuit
 
Check front VSS circuit
 
Check torque converter turbine speed sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0740



Torque Converter Clutch System Malfunction

Possible Causes:



Check any other DTC on display
 
Check lock up duty solenoid circuit
 
Check throttle position sensor circuit
 
Check torque converter turbine speed sensor circuit
 
Check engine speed input circuit
 
Check brake light switch circuit
 
Check ATF temperature sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0741



Torque Converter Clutch Circuit Performance or Stuck Off

Possible Causes:



Check any other DTC on display
 
Check lock up duty solenoid circuit
 
Check throttle position sensor circuit
 
Check torque converter turbine speed sensor circuit
 
Check engine speed input circuit
 
Check brake light switch circuit and/or inhibitor switch circuit
 
Check ATF temperature sensor circuit
 
Check poor contact
 
Check for mechanical problems
 

Trouble Code: P0743



Torque Converter Clutch System (lock up duty solenoid) Electrical

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0748



Pressure Control Solenoid (line pressure duty solenoid) Electrical

Possible Causes:



Using the a scan tool, read the data
 

Trouble Code: P0753



Shift Solenoid -A- (shift solenoid 1) Electrical

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0758



Shift Solenoid -B- (shift solenoid 2) Electrical

Possible Causes:



Using a scan tool, read the data
 

Trouble Code: P0851



Neutral Switch Input Circuit Low (automatic transaxle)

Possible Causes:



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

Trouble Code: P0852



Neutral Switch Input Circuit High (automatic transaxle)

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 inhibitor switch ground
 
Check inhibitor switch
 
Check selector cable connection
 

Trouble Code: P0864



TCM Communication Circuit Range/Performance

Possible Causes:



Check driving condition (is AT shift control functioning)
 
Check accessory
 

Trouble Code: P0865



TCM Communication Circuit Low

Possible Causes:



Check harness between ECM and TCM Connector
 
Check output signal for ECM
 
Check trouble code for automatic transaxle
 

Trouble Code: P0866



TCM Communication Circuit High

Possible Causes:



Check harness between ECM and TCM Connector
 
Check poor contact
 

Trouble Code: P1110



Atmospheric Pressure Sensor Circuit Low Input

Possible Causes:



Using the a scan tool, check current data
 
Check poor contact
 
Check input signal for ECM
 
Check harness between ECM and atmospheric pressure sensor connector
 

Trouble Code: P1111



Atmospheric Pressure Sensor Circuit High Input

Possible Causes:



Using the a scan tool, check current data
 
Check input signal for ECM
 
Check harness between ECM and pressure sensor connector
 

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: 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: P1134



Front Oxygen Sensor Micro Computer Problem

Possible Causes:



Check any other DTC on display
 

Trouble Code: P1139



Front Oxygen Sensor 1 Heater Circuit Range/Performance Problem

Possible Causes:



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

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: P1160



Throttle Actuator Control range/Performance Bank 1

Possible Causes:



Check electronic throttle control relay
 
Check power supply of electronic control relay
 
Check harness between ECM and electronic throttle control relay
 
Check sensor output
 
Check poor contact
 
Check harness between ECM and electronic throttle control
 
Check sensor power supply
 
Check for short in ECM
 
Check sensor output
 
Check harness between ECM and electronic throttle control motor
 
Check electronic throttle control motor harness
 
Check ground circuit
 
Check electronic throttle control
 

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
 

 
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