DTC P1130: Lack of HO2S-11 Switch, Fuel Trim at Limit

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P1130 - LACK OF HO2S-11 SWITCH, FUEL TRIM AT LIMIT

Description:	The heated oxygen sensor (HO2S) is monitored for switching. The test fails when the HO2S does not switch due to circuit or fuel at or exceeding a calibrated limit.
Possible Causes:	Electrical: Short to VPWR in the harness or HO2S Water in the harness connector Open/shorted HO2S circuit Corrosion or poor mating terminals and wiring Damaged HO2S Damaged powertrain control module (PCM) Fuel System: Excessive fuel pressure Leaking/contaminated fuel injectors Leaking fuel pressure regulator Low fuel pressure or running out of fuel Vapor recovery system Induction System: Air leaks after the mass air flow (MAF) sensor Vacuum leaks PCV system Improperly seated engine oil dipstick EGR System: Leaking gasket Stuck EGR valve Leaking diaphragm or EVR Base Engine: Oil overfill Camshaft timing Cylinder compression Exhaust leaks before or near the HO2S
Diagnostic Aids:	A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	-	GO to H: Fuel Control STEP H16.