Honda Civic manuals

Subaru Legacy Service Manual: Dtc p0171 system too lean bank 1

NOTE:

Refer to DTC P0175 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 2

1. OUTLINE OF DIAGNOSIS

Detect fuel system malfunction by the amount of main feedback control.

2. EXECUTION CONDITION

Secondary Parameters

Execution condition

Closed loop control with main feedback

Operation

3. GENERAL DRIVING CYCLE

Perform the diagnosis continuously during the closed loop.

4. DIAGNOSTIC METHOD

Compare the diagnostic value (fsobd) with the threshold value, and if a condition meeting the malfunction criteria listed below continues for 10 s - 3 time(s) or more, judge that there is a fault in the fuel system.

Judgment Value

Malfunction Criteria

Threshold Value

fsobd = (sglmd − tglmda) + faf + flaf

≥ Value from Map

In this case: sglmd = measured lambda

tglmda = target lambda

faf = main feedback compensation coefficient (every 64 milliseconds)

flaf = main feedback learning compensation coefficient

Map

Amount of air (g (oz)/s)

0 (0)

3.2 (0.11)

6.4 (0.23)

9.6 (0.34)

12.8 (0.45)

16 (0.56)

19.2 (0.68)

fsobdL1 (%)

1.33

1.33

1.33

1.33

1.33

1.33

1.33

Time Needed for Diagnosis: 10 s - 3 time(s)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Dtc p0172 system too rich bank 1
NOTE:Refer to DTC P0175 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0175 SYSTEM TOO RICH BANK 21. OUTLINE OF DIAGNOSISDetect fuel system malfunction by th ...

Dtc p015b a/f / o2 sensor delayed response - lean to rich bank 1 sensor 1
NOTE:For the diagnostic procedure, refer to DTC P014C. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P014C A/F / O2 SENSOR SLOW RESPONSE - RICH TO LEAN BANK 1 SENSOR 11. OUTLINE OF DI ...

Other materials:

Installation
1. SEDAN MODELCAUTION:If the hook - rear seat is disconnected from the vehicle body, make sure to replace the hook - rear seat with a new part to prevent the decline of the fixed force of the seat.1. Install the backrest assembly - rear seat.Tightening torque:53 N·m (5.4 kgf-m, 39.1 ft-lb)2. ...

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