You can find common Mercury Grand Marquis fault codes on this page that when clicked take you to a detailed description.
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Mercury Grand Marquis Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Mercury Grand Marquis has any recall notices on our sister site AutoRecalls.co, sorted by model year.View Mercury Grand Marquis Recalls »
Common Grand Marquis Fault Codes
These are the most common Grand Marquis fault codes that people are searching for.
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)Learn More
Manifold Absolute Pressure/Barometric Pressure Circuit High InputLearn More
Misfire Detected On Startup (First 1000 Revolutions)Learn More
Generator Field F Control Circuit MalfunctionLearn More
Ignition/Distributor Engine Speed Input Circuit MalfunctionLearn More
Cylinder Head Overtemperature Protection ActiveLearn More
System readiness test not completeLearn More
DPFE Circuit High InputLearn More
Fuel Pump Driver Module Off LineLearn More
DPFE Sensor Circuit Downstream HoseLearn More
Lack Of HO2S21 Switch - Sensor Indicates LeanLearn More
Evap Emission Control Sys Vent Control Valve CircuitLearn More
Cylinder Head Temp Sensor High InputLearn More
Pressure Control Solenoid "A" Short CircuitLearn More
Unable To Bleed Up Fuel Tank VacuumLearn More
Keep Alive Power Voltage Too LowLearn More
Idle Air Control Overspeed ErrorLearn More
Battery Voltage LowLearn More
- Manufacturer: Mercury