Honda Civic manuals

Subaru Legacy Service Manual: Dtc p0175 system too rich bank 2

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Improper idling

Engine stalls.

Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

STEPCHECKYESNO

1.CHECK EXHAUST SYSTEM.

Are there holes or loose bolts on exhaust system-

Repair the exhaust system.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

2.CHECK AIR INTAKE SYSTEM.

Are there holes, loose bolts or disconnection of hose on air intake system-

Repair the air intake system.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

3.CHECK FUEL PRESSURE.

WARNING:

Place “NO OPEN FLAMES” signs near the working area.

CAUTION:

Be careful not to spill fuel.

Measure the fuel pressure. Fuel Pressure > INSPECTION

CAUTION:

Before attaching/detaching a fuel pressure gauge, release the fuel pressure.

Is the measured value 340 — 400 kPa (3.5 — 4.1 kgf/cm2, 49 — 58 psi)-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

Check the fuel pump and fuel delivery line. Fuel Pump > INSPECTION Fuel Delivery and Evaporation Lines > INSPECTION

4.CHECK ENGINE COOLANT TEMPERATURE SENSOR.

1) Start the engine and warm up completely.

2) Read the value of «Coolant Temp.» using the Subaru Select Monitor or a general scan tool.

NOTE:

Subaru Select Monitor

For detailed operation procedures, refer to “Read Current Data For Engine”. Subaru Select Monitor

General scan tool

For detailed operation procedures, refer to the general scan tool operation manual.

Is the value of «Coolant Temp.» 75°C (167°F) or more-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

Replace the engine coolant temperature sensor. Engine Coolant Temperature Sensor

5.CHECK MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR SIGNAL.

1) Start the engine and warm up engine until coolant temperature is higher than 75°C (167°F).

2) Place the select lever in “P” range or “N” range.

3) Turn the A/C switch to OFF.

4) Turn all the accessory switches to OFF.

5) Read the value of «Mass Air Flow» using the Subaru Select Monitor or a general scan tool.

NOTE:

Subaru Select Monitor

For detailed operation procedures, refer to “Read Current Data For Engine”. Subaru Select Monitor

General scan tool

For detailed operation procedures, refer to the general scan tool operation manual.

Is the value of «Mass Air Flow» 2.0 — 5.0 g/s (0.26 — 0.66 lb/m)-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

Replace the mass air flow and intake air temperature sensor. Mass Air Flow and Intake Air Temperature Sensor

6.CHECK MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR.

1) Start the engine and warm up engine until coolant temperature is higher than 75°C (167°F).

2) Place the select lever in “P” range or “N” range.

3) Turn the A/C switch to OFF.

4) Turn all the accessory switches to OFF.

5) Open the front hood.

6) Measure the ambient temperature.

7) Read the value of «Intake Air Temp.» using the Subaru Select Monitor or a general scan tool.

NOTE:

Subaru Select Monitor

For detailed operation procedures, refer to “Read Current Data For Engine”. Subaru Select Monitor

General scan tool

For detailed operation procedures, refer to the general scan tool operation manual.

Subtract ambient temperature from «Intake Air Temp.». Is the obtained value −10 — 50°C (−18 — 90°F)-

Repair the poor contact of ECM connector.

Check the mass air flow and intake air temperature sensor. Mass Air Flow and Intake Air Temperature Sensor

1. OUTLINE OF DIAGNOSIS

NOTE:

For the detection standard, refer to DTC P0172. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0172 SYSTEM TOO RICH BANK 1

Dtc p0205 cylinder 5 injector "a" circuit
NOTE:For the diagnostic procedure, refer to DTC P0201. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0201 CYLINDER 1 INJECTOR "A" CIRCUIT1. OUTLINE OF DIAGNOSISNOTE:For the detection ...

Dtc p0174 system too lean bank 2
NOTE:Refer to DTC P0175 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 21. OUTLINE OF DIAGNOSISNOTE:For the detection standard, ref ...

Other materials:

Dtc p0024 "b" camshaft position - timing over-advanced or system performance bank 2
DTC DETECTING CONDITION:Detected when two consecutive driving cycles with fault occur.TROUBLE SYMPTOM:• Engine stalls.• Improper idlingCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCE ...

© 2017-2019 Copyright www.sulegacy.com