Diagnostic Trouble Code (DTC) Descriptions

Diagnostic Trouble code (DTC) Descriptions 1999 PCED OBDII SECTION 4: Diagnostic Subroutines Diagnostic Trouble code (DTC) Descriptions DTC Description Possible Causes Diagnostic Aides P0102 - Mass Air Flow (MAF) Circuit Low Input The MAF sensor circuit is monitored by the PCM for low air flow (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine running the air flow (or voltage) changes below a minimum calibrated limit, the test fails. l MAF sensor disconnected l MAF circuit open to PCM l VPWR open to MAF sensor l PWR GND open to MAF sensor l MAF RTN circuit open to PCM l MAF circuit shorted to GND l Intake air leak (near MAF sensor) l A closed [throttle indication throttle position (TP) sensor system] l Damaged MAF sensor l Damaged PCM A MAF V PID (MAF PID) reading less than volts (Refer to equivalent grams/seco)

Diagnostic Trouble Code (DTC) Descriptions . P0118 - Engine Coolant Temperature (ECT) Circuit High Input . Indicates the sensor signal is greater than

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