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ENGINE MANAGEMENT SYSTEM - V8 DESCRIPTION AND OPERATION 18-2-25 In the event of a MAF sensor signal failure any of the following symptoms may be observed: l During driving engine rev/min may dip, before recovering. l Difficult starting. l Engine stalls after starting. l Delayed throttle response. l Emissions control inoperative. l Idle speed control inoperative. l Reduced engine performance. l MAF sensor signal offset. There are two types of MAF sensor diagnostic check: l The MAF sensor signal is less than the minimum threshold for specific speed range – the engine must have l The MAF sensor signal is greater than the maximum threshold for specific speed range – the engine must have If the MAF sensor fails the following fault codes will be produced and can be retrieved by TestBook: P code J2012 description Land Rover description P0102 Mass or volume air flow low input MAF signal < minimum threshold, which is speed P0103 Mass or volume air flow circuit high input MAF signal > maximum threshold, which is speed |