Subaru Crosstrek Service Manual: Dtc p2195 a/f /o2 sensor signal biased/stuck lean bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P2195 A/F /O2 SENSOR SIGNAL BIASED/STUCK LEAN BANK 1 SENSOR 1
DTC detecting condition:
Detected when two consecutive driving cycles with fault occur.
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">
, and Inspection Mode Inspection Mode > PROCEDURE">.
Wiring diagram:
Engine electrical system Engine Electrical System">
| STEP | CHECK | YES | NO |
1.CHECK FRONT OXYGEN (A/F) SENSOR CONNECTOR AND COUPLING CONNECTOR.
Has water entered the connector?
Completely remove any water inside.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P2195 A/F /O2 SENSOR SIGNAL BIASED/STUCK LEAN BANK 1 SENSOR 1">Go to Step 2.
2.CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Disconnect the connectors from front oxygen (A/F) sensor.
4) Measure the resistance of harness between ECM connector and front oxygen (A/F) sensor connector.
Connector & terminal
(B136) No. 19 — (E24) No. 3:
(B136) No. 18 — (E24) No. 4:
Is the resistance less than 1 ??
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P2195 A/F /O2 SENSOR SIGNAL BIASED/STUCK LEAN BANK 1 SENSOR 1">Go to Step 3.
Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between ECM connector and front oxygen (A/F) sensor connector
• Poor contact of coupling connector
3.CHECK FOR POOR CONTACT.
Check for poor contact of the front oxygen (A/F) sensor connector.
Is there poor contact of front oxygen (A/F) sensor connector?
Repair the poor contact of front oxygen (A/F) sensor connector.
Replace the front oxygen (A/F) sensor. Front Oxygen (A/F) Sensor">
1. OUTLINE OF DIAGNOSIS
Detect that λ value remains low.
Judge as NG when lambda value is abnormal in accordance with λ value of front oxygen (A/F) sensor and running conditions such as vehicle speed, amount of intake air, engine coolant temperature, sub feedback control, etc.
λ value = Actual air fuel ratio/Theoretical air fuel ratio |
λ > 1: Lean |
λ < 1: Rich |
2. COMPONENT DESCRIPTION
(A) | Electromotive force | (B) | Air fuel ratio | (C) | Rich |
(D) | Lean | ||||
(1) | Exhaust gas | (2) | Zirconia element oxygen |
3. EXECUTION CONDITION
Secondary parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Barometric pressure | > 75.1 kPa (563 mmHg, 22.2 inHg) |
Main feedback | In operation |
Amount of intake air | ≥ 6 g/s (0.21 oz/s) |
Estimated temperature of the rear oxygen sensor element | ≥ 500 °C (932 °F) |
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously during driving.
5. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
λ value | > 1.15 |
Output voltage value of rear oxygen sensor | > 0.7 V |
Time needed for diagnosis: 10000 ms
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
Dtc p2138 throttle/pedal position sensor/switch "d"/"e" voltage correlation
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH "D"/"E" VOLTAGE CORRELATIONDTC DETECTING COND ...
Dtc p2196 a/f /o2 sensor signal biased/stuck rich bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2196 A/F /O2 SENSOR SIGNAL BIASED/STUCK RICH BANK 1 SENSOR 1DTC DETECTING CONDITION:Detected when two consec ...
Other materials:
Installation
STARTING/CHARGING SYSTEMS(H4DO) > GeneratorINSTALLATION1. Temporarily install the generator bracket to the engine and tighten the bolts in the numerical order.Tightening torque:36 N·m (3.7 kgf-m, 26.6 ft-lb)2. Install the V-belt tensioner assembly. V-belt > INSTALLATION">3. Tem ...
Basic diagnostic procedure Procedure
AUTO HEADLIGHT BEAM LEVELER SYSTEM (DIAGNOSTICS) > Basic Diagnostic ProcedurePROCEDURESTEPCHECKYESNO1.PERFORM CUSTOMER INTERVIEW.Using the Check List for Interview, ask the customer the condition of how the trouble occurred. Check List for Interview > CHECK">Did you interview the cust ...
Read diagnostic trouble code (dtc) Operation
POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS) > Read Diagnostic Trouble Code (DTC)OPERATION1. On «Start» display, select «Diagnosis».2. On «Vehicle selection» display, input the vehicle information and select «Confirmed».3. On «Main Menu» display, select «Each System».4. On «S ...
