2000 Ford Explorer Engine Hesitation

2000 FORD EXPLORER
113,000 MILES • 6 CYL • 4WD • AUTOMATIC
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KSMITH0110
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My truck hesitates under acceleration around 45-55 mph. It runs fine but uses a LOT of gas. I just replaced the motor with a 9000 mile motor. It's giving me P1131 & P1132 codes. I've checked the catalytic converters and the EGR valve operation. Like I said it runs fine except for the hesitation and the gas guzzling.
Mar 16, 2008 at 7:34 PM
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BMRFIXIT
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you need to look at the o2 sensors
P0131 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1)

P0132 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 1)
Mar 17, 2008 at 7:44 PM
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KSMITH0110
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I took it to a qualified mechanic in my area - rather than throw parts at it. It turned out to be a bad O2 sensor. He said that it showed a negative voltage reading back to the computer. With that changed, the truck runs perfectly.
Mar 19, 2008 at 7:39 PM
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