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Diagnostic Trouble Code: B1693

Diagnostic Trouble Code Name: Autolamp On Circuit Failure. Autoheadlamps Driver Circuit Failure, External Fault.

Vehicle Make: Ford

Vehicle Model: Falcon (BF)

Diagnostic Code Entered By: ZerOne

Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm

Please Note: The DTC Information provided has been randomly generated.

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Diagnostic Trouble Code Description: 

H02S Heater Control Circuit Bank 1 Sensor 1

Possible Sensor Faults
ECM

Possible Related Diagnostic Trouble Codes
DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0056, P0057, or P0058

Circuit / System Description
The heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature. Voltage is provided to the heater by the ignition?1 voltage circuit through a fuse. Ground is provided to the heater on the low control circuit by a low side driver within the control module. The control module monitors the current draw of the heater to determine if a failure is present.

The HO2S utilizes the following circuits: