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.
Dtc p013f o2 sensor delayed response - lean to rich bank 1 sensor 2
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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 ...
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If your vehicle is involved in an accident
CAUTION
If your vehicle is involved in an
accident, be sure to inspect the
ground under the vehicle before
restarting the engine. If you find that
fuel has leaked on the ground, do
not try to restart the engine. The fuel
system has been damaged and is in
need of repair. Immediately contact
...
Disassembly
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO) > Drain SeparatorDISASSEMBLY1. Disconnect the drain tube (A) from the leak check valve assembly.NOTE:Disconnect the quick connector as shown in the figure.2. Lift up the claw (B) of the drain separator and slide the drain separator in the dir ...
Removal
PARKING BRAKE > Parking Brake Assembly (Rear Disc Brake)REMOVAL1. Release the parking brake.2. Lift up the vehicle, and then remove the rear wheels.3. Remove the rear disc rotor. Rear Disc Rotor > REMOVAL">4. Remove the spring - primary shoe return and the spring - secondary shoe retu ...
