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Diagnostic Trouble Code: P0203
Diagnostic Trouble Code Name: injector 3 (INJ3) circuit malfunction.
Vehicle Make: Ford
Vehicle Model: Falcon (AU)
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:
Catalyst System Low Efficiency
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0420
Circuit / System Description
A 3-way catalytic converter controls emissions by converting hydrocarbons and carbon monoxide (CO) into carbon dioxide (CO2), and oxides of nitrogen (NOX) into nitrogen. The three-way catalytic converter also stores oxygen. When the listed driving conditions are met, the Catalyst System Efficiency test will run. The engine control module (ECM) monitors this oxygen storage capacity by comparing the pre-and post-catalyst oxygen sensor signals while adding and subtracting fuel during specific driving conditions. The ECM compares the pre-and post-catalyst oxygen sensor signals to determine if the oxygen storage capacity of the catalyst is degraded.
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