P1130 code

Discussion in '94-04 V6 Mustang' started by mamastang, Jun 27, 2004.

  1. mamastang New Member

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    I got a p1130code and none of my books really define this well. Anyone know what it really means. I know it has something t do with the ho2 sensor. But I do not know witch of the 4. I do know it is running very rich. What all do I need to look for.
    mamastang, Jun 27, 2004
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  2. Jamez Founding Member

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    All I could find was:
    P1130 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 1.
    Jamez, Jun 27, 2004
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  3. Jamez Founding Member

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    Wait a second...
    P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit The HEGO Sensor is monitored for switching. The code will set when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.
    Possible Causes
    Electrical:
    · Short to VPWR or VREF in harness or HO2S
    · HO2S circuit shorted to Ground
    · Water in harness connector
    · Open circuit
    · Corrosion or poor mating terminals and wiring
    · Damaged HO2S
    · Damaged PCM (other DTCs should be present)
    Fuel System:
    · Excessive fuel pressure (stuck fuel pressure regulator, restricted fuel return lines, etc.)
    · Leaking/contaminated fuel injectors or fuel pressure regulator
    · Low fuel pressure or running out of fuel (fuel pump concern, fuel supply line restrictions, low fuel level, etc.)
    · Vapor recovery system (stuck VMV, etc.)
    Induction System:
    · MAF contamination
    · Air leaks between MAF and throttle plate
    · PCV system / Other vacuum leaks
    · Improperly seated engine oil dipstick
    EGR System:
    · Leaking gasket
    · Stuck EGR valve / Leaking diaphragm or EVR
    Base Engine:
    · Oil overfill
    · Incorrect cylinder compression
    · Exhaust leaks before or near the HO2S
    · Secondary air stuck on
    Jamez, Jun 27, 2004
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  4. mamastang New Member

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    I replaced the o2 sensors yesterday and the light went off. But I got about 20 miles in on it and it came back on. I changed the plugs as well. checked all I could could not find any leaks or hoses loose. I am at my witts end. I have had the car for 2 years and it has always run rich and gotten bad gas mileage. I think 10 miles to the gallon is pretty bad for a 6 cyl. I can smell a strong fuel smell also. even when it is just sitting idleing. I have no idea what was done to the car before I got it. The only thing I know has been changed is the Filter now a K&N. They had a different stero in it as well. It belonged to some teenage boys so I do not know if any under hood mods have been made.
    I wanted to change out the exhaust. Do away with cats and go flowmaster all the way dual.
    Since we do not have emission testing here.
    Any info would help. I am willing to check all possible causes so I can have the car I thought I was getting to start with. With gas prices like they are I have not been driving it much.
    mamastang, Jun 27, 2004
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