LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Instrument Cluster System) >> Diagnostic Tests >> Instrument Cluster >> Pinpoint Tests >> Pinpoint Test F: The Check Fuel Cap Indicator Is Never On >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) monitors the fuel tank evaporative system for significant leaks that occur following refueling of the vehicle.

DTC P0457 - sets if a fuel tank pressure change greater than 23.7 kPa (-7 in-Hg) of water within 30 seconds after refueling occurs, or there is an excessive purge (fuel vapor) flow greater than 0.45 gm/s (0.06 lb) per minute and the PCM sends a message to the instrument cluster over the communication network to illuminate the check fuel cap indicator.

Possible Causes

scientia non olet · About LEMON Manuals