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Diagnostic Trouble Code: B1251
Diagnostic Trouble Code Name: Air Temperature Internal Sensor Circuit Open Input floats > 4.56V
Vehicle Make: Ford
Vehicle Model: Falcon (FG)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Accelerator Pedal Position Sensor 1 Circuit High Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P2122, P2123, P2127, P2128, or P2138
Circuit / System Description
The accelerator pedal assembly contains two accelerator pedal position (APP) sensors. The APP sensors are mounted in the pedal assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to the position of the accelerator pedal. The engine control module (ECM) supplies a separate 5-volt reference and low reference circuit for each of the APP sensors.
The APP sensor 1 signal voltage increases as the pedal is depressed, from approximately 1.0?volt at rest to approximately 4?volts when fully depressed. The APP sensor 2 signal voltage increases as the pedal is depressed, from approximately 0.5?volt at rest to approximately 2?volts with the accelerator pedal fully depressed.
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