P0191 is a common OBD-II code. It indicates that the fuel rail pressure sensor is receiving a signal that is outside of its normal range. This is a generic code, which indicates that it has the same meaning for the Mercury Grand Marquis as it would any other vehicle. P0191 is typically … Read more
P0123 is a relatively common OBD-II code. It’s generic, which means it has the same meaning for the Mercury Grand Marquis as it would any other vehicle. It’s an OBDII code that references issues with the Throttle Position Sensor (TPS). It is relatively serious problem since it can leave your vehicle stranded or severely limited. … Read more
P0332 is a powertrain related OBD-II trouble code. It has the same meaning for the Mercury Grand Marquis as it would any other vehicle. By definition, P0332 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range from the knock sensor (Sensor 2 | Bank 2). Clearing this … Read more
P0327 is a powertrain related OBD-II trouble code. It has the same meaning for the Mercury Grand Marquis as it would any other vehicle. By definition, P0327 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range. Clearing this code typically requires a new knock sensor or … Read more
Your Mercury Grand Marquis’s door ajar message can help you get a door all the way closed when you otherwise wouldn’t notice when it was open. Over the life of the vehicle, it is possible for the door ajar warning to stay on even when the doors are, in fact, not ajar. The … Read more
Transmissions are an integral part of any vehicle, and overheating can lead to costly repairs or even permanent damage. Mercury Grand Marquis owners should be aware of the common symptoms and causes of transmission overheating to prevent potential issues and ensure their trucks remain strong and reliable. In this article, we will discuss the common … Read more
When you start your Mercury Grand Marquis, the OBD-II system runs a self diagnostic check on all major systems. If any of these checks fail, you will see a diagnostic warning light on the dash for the corresponding system. When the SRS system fails this check, you’ll see the SRS light. SRS stands for … Read more
P1000 is a manufacturer specific trouble code. In the case of Ford vehicles manufactured by Ford (including the Mercury Grand Marquis), it indicates that the OBD-II monitor testing has not been completed. This often occurs when the trouble codes have been reset, or the battery has been disconnected/replaced. Auto manufacturers are required to have their … Read more
The radiator of a Mercury Grand Marquis can leak for a variety of reasons, and if not fixed quickly, can cause expensive engine damage. Overheating can be a result of a leaking radiator, potentially resulting in costly, long-term damage, such as a blown head gasket or a cracked cylinder head. Identifying the symptoms of a … Read more
One of the most common problems that can happen to a vehicle is a heater core leak. If your Mercury Grand Marquis has a leaking heater core, it is not a breakdown risk. Although, it is necessary to make sure that the lost coolant is replaced. It can cause damage to the vehicle in other … Read more