Subaru Forester 1998-05

2.5L H4 - Auto 7

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Trouble Code: P2011



Tumble Generated Valve System 2 Circuit Malfunction (short)

Possible Causes:



Check harness between ECM and tumble generator valve actuator connector
 

Trouble Code: P2016



Tumble Generated Valve Position Sensor 1 Circuit Low

Possible Causes:



Using the a scan tool, check current data
 
Check input signal for ECM
 
Check harness between ECM and tumble generator valve position sensor connector
 
Check harness between ECM and throttle position sensor connector
 
Check poor contact
 

Trouble Code: P2017



Tumble Generated Valve Position Sensor 1 Circuit High

Possible Causes:



Using a scan tool, check current data
 
Check harness between tumble generator valve position sensor and ECM connector
 

Trouble Code: P2021



Tumble Generated Valve Position Sensor 2 Circuit Low

Possible Causes:



Using a scan tool, check current data
 
Check input signal for ECM
 
Check harness between ECM and tumble generator valve position sensor connector
 
Check poor contact
 

Trouble Code: P2022



Tumble Generated Valve Position Sensor 2 Circuit High

Possible Causes:



Using a scan tool, check current data
 
Check harness between tumble generator valve position sensor and ECM connector
 
Check poor contact
 

Trouble Code: P2088



OCV Solenoid Valve Signal -A- Circuit Open (bank 1)

Possible Causes:



Check harness between ECM and oil flow control solenoid valve
 
Check oil flow control solenoid valve
 

Trouble Code: P2089



OCV Solenoid Valve Signal -A- Circuit Short (bank 1)

Possible Causes:



Check harness between ECM and oil flow control solenoid valve
 
Check oil flow control solenoid valve
 

Trouble Code: P2092



OCV Solenoid Valve Signal -A- Circuit Open (bank 2)

Possible Causes:



Check harness between ECM and oil flow control solenoid valve
 
Check oil flow control solenoid valve
 

Trouble Code: P2093



OCV Solenoid Valve Signal -A- Circuit Short (bank 2)

Possible Causes:



Check harness between ECM and oil flow control solenoid valve
 
Check oil flow control solenoid valve
 

Trouble Code: P2096



Post Catalyst Fuel Trim System Too Lean Bank 1

Possible Causes:



Check any other DTC on display
 
Using the a scan tool, check front oxygen sensor data
 
Using the Subaru scan tool, check rear oxygen sensor data
 
Check exhaust system
 
Check air intake system
 
Check fuel pressure
 
Check engine coolant temperature sensor
 
Check Mass air flow and intake air temperature
 
Check harness between ECM and front oxygen sensor connector
 
Using harness between ECM and rear oxygen sensor connector
 

Trouble Code: P2097



Post Catalyst Fuel Trim System Too Rich Bank 1

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check front oxygen sensor data
 
Using a scan tool, check rear oxygen sensor data
 
Check exhaust system
 
Check air intake system
 
Check fuel pressure
 
Check engine coolant temperature sensor
 
Check Mass air flow and intake air temperature
 
Check harness between ECM and front oxygen sensor connector
 
Using harness between ECM and rear oxygen sensor connector
 

Trouble Code: P2101



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: P2102



Throttle Actuator Control Motor Circuit Low

Possible Causes:



Check electronic throttle control relay
 
Check power supply of electronic control relay
 
Check harness between ECM and electronic throttle control relay
 

Trouble Code: P2103



Throttle Actuator Control Motor Circuit High

Possible Causes:



Check electronic throttle control relay
 
Check for short circuit of the relay and power supply
 
Check harness between ECM and electronic throttle control relay
 

Trouble Code: P2109



Throttle/Pedal Position Sensor -A- Minimum Stop Performance

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: P2122



Throttle/Pedal Position Sensor -D- Circuit Low Input

Possible Causes:



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

Trouble Code: P2123



Throttle/Pedal Position Sensor/Switch -D- Circuit High Input

Possible Causes:



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

Trouble Code: P2127



Throttle/Pedal Position Sensor/Switch -E- Circuit Low Input

Possible Causes:



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

Trouble Code: P2128



Throttle/Pedal Position Sensor/Switch -E- Circuit High Input

Possible Causes:



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

Trouble Code: P2135



Throttle/Pedal Position Sensor/Switch -A-/-B- Voltage Rationality

Possible Causes:



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

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: P0011



Intake Camshaft Position Timing (over advanced) Bank 1

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data. Check AVCS system.
 
Oil pipe clog
 
Clogged oil flow control solenoid valve
 
Intake camshaft damaged
 
Timing chain problem
 

Trouble Code: P0016



Crankshaft Position (camshaft position correlation) Bank 1

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data. Check AVCS system.
 
Oil pipe clog
 
Clogged oil flow control solenoid valve
 
Intake camshaft damaged
 
Timing chain problem
 

Trouble Code: P0018



Crankshaft Position (camshaft position correlation) Bank 2

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data. Check AVCS system.
 
Oil pipe clog
 
Clogged oil flow control solenoid valve
 
Intake camshaft damaged
 
Timing chain problem
 

Trouble Code: P0021



Intake Camshaft Position Timing (over advanced) Bank 2

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data. Check AVCS system.
 
Oil pipe clog
 
Clogged oil flow control solenoid valve
 
Dirty engine oil
 
Intake camshaft damaged
 
Timing chain problem
 

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: P0261



Fuel Injector Circuit Low Input No. 1

Possible Causes:



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

Trouble Code: P0262



Fuel Injector Circuit High Input No. 1

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0264



Fuel Injector Circuit Low Input No. 2

Possible Causes:



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

Trouble Code: P0265



Fuel Injector Circuit High Input No. 2

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0267



Fuel Injector Circuit Low Input No. 3

Possible Causes:



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

Trouble Code: P0268



Fuel Injector Circuit High Input No. 3

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P0270



Fuel Injector Circuit Low Input No. 4

Possible Causes:



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

Trouble Code: P0271



Fuel Injector Circuit High Input No. 4

Possible Causes:



Check output signal from ECM
 
Check harness between injector and ECM connector
 
Check any other DTC on display
 
Using a scan tool, check current data
 
Check air intake system
 
Check for misfire
 

Trouble Code: P1301



Misfire Detected (high temperature exhaust gas)

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 

Trouble Code: P1312



Exhaust Gas Temperature Sensor malfunction

Possible Causes:



Check any other DTC on display
 
Using a scan tool, check current data
 

 
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