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Home >> Subaru >> 2007 >> B9 Tribeca Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H6DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P1152 O2 Sensor Circuit Range/Performance (Low) (Bank 1 Sensor 1) >> Enable Conditions
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Enable Conditions

ENABLE CONDITIONS

Secondary Parameters Enable Conditions
All secondary parameters enable conditions 4 seconds or more
Battery voltage > 10.9 V
Atmospheric pressure > 75.1 kPa (563 mmHg, 22.2 inHg)
Rear oxygen sensor sub feedback Execution
Rear oxygen sensor output voltage - Feedback target voltage -0.2 V ←→ 0.1 V
or rear oxygen sensor sub feedback compensation coefficient On Min.
or rear oxygen sensor sub feedback compensation coefficient On Max.
After engine starting 60 seconds or more
Engine coolant temperature ≥ 75°C (167°F)
Vehicle speed ≥ 20 km/h (12 MPH)
Amount of intake air ≥ 8 g (0.28 oz)/s
Load change in 1/3 engine revolution. ≤ 0.02g (0.001 oz)/rev
Front oxygen (A/F) sensor impedance 0 ←→ 50 Ω
Learning value of evaporation gas density ≤ 0.12
Total time of operating canister purge 20 seconds or more
Targeted lambda value load compensation coefficient -0.05 ←→ 0.05