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Home >> Subaru >> 2013 >> Forester X Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P219A Bank 1 Air-Fuel Ratio Imbalance >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge as NG when the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Rich   
Main feedback learning value < -0.124
Sub feedback learning value < -0.043
When any one of the followings is established.  
  • Any one of the rich side misfire counters for each cylinder when in idling
> 9 time(s)
  • Total of the rich side misfire counters for each cylinder when in idling
> 9 time(s)
  • Any one of the rich side misfire counters for each cylinder when not in idling
> 20 time(s)
  • Total of the rich side misfire counters for each cylinder when not in idling
> 20 time(s)
Lean   
Main feedback learning value > 0.021
Sub feedback learning value < -0.013
When any one of the followings is established.  
  • Any one of the lean side misfire counters for each cylinder when in idling
> 115 time(s)
  • Total of the lean side misfire counters for each cylinder when in idling
> 65535 time(s)
  • Any one of the lean side misfire counters for each cylinder when not in idling
> 45 time(s)
  • Total of the lean side misfire counters for each cylinder when not in idling
> 65535 time(s)

Time Needed for Diagnosis:  1000 engine revs.

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

Judge as OK and clear the NG if the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Rich   
Main feedback learning value ≥ -0.124
or  
Sub feedback learning value ≥ -0.043
or  
All of the following conditions are established.  
  • Any one of the rich side misfire counters for each cylinder when in idling
≤ 9 time(s)
  • Total of the rich side misfire counters for each cylinder when in idling
≤ 9 time(s)
  • Any one of the rich side misfire counters for each cylinder when not in idling
≤ 20 time(s)
  • Total of the rich side misfire counters for each cylinder when not in idling
≤ 20 time(s)
Lean   
Main feedback learning value ≤ 0.021
or  
Sub feedback learning value ≥ -0.013
or  
All of the following conditions are established.  
  • Any one of the lean side misfire counters for each cylinder when in idling
≤ 115 time(s)
  • Total of the lean side misfire counters for each cylinder when in idling
≤ 65535 time(s)
  • Any one of the lean side misfire counters for each cylinder when not in idling
≤ 45 time(s)
  • Total of the lean side misfire counters for each cylinder when not in idling
≤ 65535 time(s)

Time Needed for Diagnosis:  1000 engine revs.