Diagnostic Aids

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The MIL indicator flashes when there is an engine misfire.
High resistance in the circuits of the fuel injectors may set a misfire DTC without setting a fuel injector DTC. Test the fuel injector circuits of the affected cylinder(s) for a high resistance if you suspect a condition.
Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector Control Circuit Status parameters. An Injector Control Circuit Status parameter will change from OK or Not Run to Malfunction if there is a condition with the circuit or a connection.