DF309 Mercury Grand Marquis DTC Code

Mercury Grand Marquis Engine Specifications:

Engine Type :	Multi-Cylinder Engine
Cylinder Type :	Opposed Cylinder Engine
Engine Air Intake Process :	Supercharged Engine

Your Mercury Grand Marquis engine control system detects a problem, the computer stores the diagnostic trouble code DF309 in its memory. To figure out what is wrong with your vehicle you must first extract the DF309 DTC For Mercury Grand Marquis.

To solve DF309 Mercury Grand Marquis problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs

DF309 Mercury Grand Marquis DTC Meaning

D	Chassis Code - Problem is controller area network wiring bus and modules.
F	SAE - Generic
3	IC Module 4X Ref Circuit Intermittent, No Pulses
0	Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
9	A/C System High Pressure High Temperature

When you turn on the ignition, the Service Engine Soon or Check Engine DF309 Mercury Grand Marquis light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If DF309 DTC For Mercury Grand Marquis so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the DF309!