Subaru Crosstrek Service Manual: Dtc p0141 o2 sensor heater circuit bank 1 sensor 2
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P0141 O2 SENSOR HEATER CIRCUIT BANK 1 SENSOR 2
Refer to DTC P0037 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0037 A/F / O2 HEATER CONTROL CIRCUIT LOW BANK 1 SENSOR 2">
1. OUTLINE OF DIAGNOSIS
Detect malfunction of the rear oxygen sensor heater.
Judge as NG if it is determined that the rear oxygen sensor impedance is large by observing the engine conditions.
2. COMPONENT DESCRIPTION
(1) | Element cover (outer) | (3) | Sensor element | (5) | Sensor housing |
(2) | Element cover (inner) | (4) | Ceramic heater |
3. EXECUTION CONDITION
Secondary Parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Elapsed time after starting the engine | ≥ 1000 ms |
A/F sensor element impedance | ≤ 82 ? |
A/F sensor heater control duty | ≤ 75 % |
Rear oxygen sensor heater control duty | < 70 % |
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after 1000 ms or more have passed since the engine started.
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 |
Measured secondary oxygen sensor heater control voltage | 12 V battery system voltage ? 0.88 V |
Time needed for diagnosis: 4 ms ? 2500 times
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
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Dtc p014c a/f / o2 sensor slow response - rich to lean bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P014C A/F / O2 SENSOR SLOW RESPONSE - RICH TO LEAN BANK 1 SENSOR 1DTC DETECTING CONDITION:Detected when two c ...
Other materials:
Removal
FRONT SUSPENSION > Front StabilizerREMOVAL1. Lift up the vehicle, and then remove the left and right front wheels.2. Remove the under cover - front. Front Under Cover > REMOVAL">3. Remove the front crossmember support. Front Crossmember Support Plate > REMOVAL">4. Remove t ...
Driving on snowy and icy roads
To prevent skidding and slipping, avoid
sudden braking, abrupt acceleration, highspeed
driving, and sharp turning when
driving on snowy or icy roads.
Always maintain ample distance between
your vehicle and the vehicle ahead of you
to avoid the need for sudden braking.
To supplement the fo ...
Installation
POWER ASSISTED SYSTEM (POWER STEERING) > Steering ColumnINSTALLATIONCAUTION:If the steering wheel and steering angle sensor are removed, perform the following VDC setting mode.– Model without EyeSight: VDC sensor midpoint setting mode VDC Control Module and Hydraulic Control Unit (VDCCM&H ...
