Chart 12

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Lincoln Navigator L, 2011 Lincoln Navigator, and 2011 Lincoln MKZ. However, it is still accessible from the selected car via links, so may be relevant.

Warning Indicators: Check Fuel Cap Indicator, Malfunction Indicator Lamp (MIL), Power Take Off (PTO), Temperature Warning Indicator or Gauge (applications with cylinder head temperature [CHT] sensor only), Transmission Control Indicator Lamp (TCIL), Powertrain Malfunction Indicator (Wrench)
PTO Concerns: Not Working Correctly

NOTE:

If the symptom is both a MIL on and exhaust emission test failure, GO directly to Chart 11.
If the engine is a no start, GO directly to Chart 3.
If the engine runs rough at idle, GO directly to Chart 1.

SYMPTOM CHART - WARNING INDICATORS AND PTO CONCERNS

SYSTEM/COMPONENT	REFERENCE (Pinpoint Test unless noted)
Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed.	Visual.
Check Fuel Cap Indicator Never/always on	REFER to the appropriate INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article, to diagnose the check fuel cap indicator is never/always on or to diagnose the CHECK FUEL CAP warning is inoperative.
MIL Always on when the engine is running (no DTCs present) Never on (including during indicator prove out)	REFER to the appropriate INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article, and carry out the Inspection and Verification to continue diagnosis.
PTO PTO indicator never/always on PTO not working correctly	GO to PINPOINT TEST FB .
Temperature Warning Indicator or Gauge (applications with CHT sensor only) Engine cooling system Indicator circuits	For an engine that is overheating, REFER to the appropriate ENGINE COOLING article to diagnose the engine overheating symptom. Be aware that since a PCM DTC is not present, the PCM is not attempting to activate the indicator. For an engine operating at normal temperature, GO to PINPOINT TEST DL .
TCIL Always on when the engine is running (no DTCs present) Never on	REFER to the appropriate INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article.
Powertrain Malfunction Indicator (Wrench) Never/always on	REFER to the INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article, to diagnose the wrench indicator is never/always on or to diagnose the POWERTRAIN MALFUNCTION warning is inoperative.
Additional Testing	GO to PINPOINT TEST Z .