Subaru Crosstrek Service Manual: Dtc p013b o2 sensor slow response - lean to rich bank 1 sensor 2
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P013B O2 SENSOR SLOW RESPONSE - LEAN TO RICH BANK 1 SENSOR 2
NOTE:
For the diagnostic procedure, refer to DTC P013A. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P013A O2 SENSOR SLOW RESPONSE - RICH TO LEAN BANK 1 SENSOR 2">
1. OUTLINE OF DIAGNOSIS
Detect the slow response of lean > rich for rear oxygen sensor output.
After the deceleration fuel cut has occurred, detect the trouble by calculating the time when the rear oxygen sensor output passes through the predetermined range of voltages.
Judge as NG when the response time is larger than the threshold value.
2. COMPONENT DESCRIPTION
(A) | Electromotive force | (B) | Air fuel ratio | (C) | Lean |
(D) | Rich | (E) | Theoretical air fuel ratio | (F) | Comparative voltage |
(1) | Atmosphere | (2) | Exhaust gas | (3) | Electromotive force |
3. EXECUTION CONDITION
Secondary parameters | Execution condition |
Battery voltage | ≥ 10.9 V |
Main feedback | In operation |
(Elapsed time after fuel cut | ≥ 5000 ms |
Time of fuel cut recovery from above) | ≥ 4000 ms |
4. GENERAL DRIVING CYCLE
Perform diagnosis only once after recovering from a deceleration fuel cut continued for more than predetermined time.
5. DIAGNOSTIC METHOD
Detect the trouble by calculating the response time of the rear oxygen sensor after fuel cut.
(A) | 0.55 V | (B) | 0.50 V | (C) | 0.30 V |
(D) | 0.25 V | (E) | 0 V | (F) | Diagnostic parameter |
(G) | Normal | (H) | Malfunction |
Judge as NG when the following conditions are established.
Malfunction Criteria | Threshold Value |
Time needed for rear oxygen sensor voltage to change from 0.3 V to 0.5 V | > 4000 ms |
Time needed for diagnosis: Less than 1 second
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
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