P0103 – Mass Air Flow (MAF) Circuit High Input

P0103 – Mass AirFlow (MAF) Circuit High Input

Description

The MAF sensor
circuit is monitored by the PCM for high air flow (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the air flow (or voltage) changes above a maximum calibrated limit, the test fails.

Possible Causes

● MAF sensor screen is
blocked
● MAF circuit shorted to VPWR
● Damaged MAF sensor
● Damaged PCM

Diagnostic Aides

A MAF V PID (MAF PID)
reading less than 4.6 volts (Refer to equivalent grams/second chart in Pinpoint Test DC) in continuous memory or key ON and engine running indicates a hard fault.

 

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P0103 – Mass AirFlow (MAF) Circuit High Input

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