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HOMESERVICE MANUALSFORD2004FOCUS ZX3, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP1130 - LACK OF HO2S-11 SWITCH, FUEL TRIM AT LIMIT
2004 Ford Focus ZX3, 2.3 Z, Standard

P1130 - Lack Of Ho2S-11 Switch, Fuel Trim At Limit

2004 Ford Focus ZX3, 2.3 Z, StandardSECTION P1130 - Lack Of Ho2S-11 Switch, Fuel Trim At Limit
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 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 MAF.
  • Vacuum Leaks.
  • PCV system.
  • Improperly seated engine oil dipstick.
  • EGR System:
  • Leaking gasket.
  • Stuck EGR valve.
  • Leaking diaphragm or EVR.
  • Base Engine:
  • Oil overfill.
  • Cam Timing.
  • Cylinder compression.
  • Exhaust leaks before or near the HO2S(s).
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 
Dedicated NGV - - GO to HA: Natural Gas Fuel Control STEP 9
All Others - - GO to H: Fuel Control STEP 17
RENDER: 1.0x

NO RELATED

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