One of the most common trouble codes with the Mercury Grand Marquis is P0174. It indicates that your Mercury Grand Marquis is running lean on the bank two side of the engine. P0174 and P0171 (fuel trim lean bank one) are the most frequently seen air/fuel mixture-related codes. If they appear together, it reduces the … Read more
P0021 is a common trouble code. It affects vehicles with variable valve timing (VVT). The list of VVT vehicles is growing, and the Mercury Grand Marquis can have VVT, and is prone to developing this code. P0021 is a generic OBDII code. This means that it has the same definition regardless of the … Read more
P0305 is a fairly common trouble code with the Mercury Grand Marquis. It’s and OBD2 code and stands for: P0305 is certainly a cause for concern, and should be considered a threat to the drivability your Grand Marquis. The nice thing about P0305 is that it’s a cylinder specific trouble code, which makes diagnosing the … Read more
One of the most common trouble codes with the Mercury Grand Marquis is the P0456 code. This trouble code references a number that is given to you when you plug your Grand Marquis into an OBDII scanner. P0456 Indicates that there is a small leak in the evaporative emission control system. It often appears with … Read more
P0507 is a fairly typical OBDII trouble code that can occur in the Mercury Grand Marquis. It is typically triggered when the engine idle speed is 200 rpm or more over the predetermined limit set by the Mercury It is a generic code, which means that it has the same meaning for the Mercury Grand Marquis as any … Read more
P0741 is a very common OBDII trouble code. It’s know to affect the Mercury Grand Marquis quite often. Here’s what it means: P0741: Torque Converter Clutch Circuit → Performance or Stuck Off The Grand Marquis uses a clutch in the torque converter to lock the engine and transmission together at highway speed. P0741 can register … Read more
A common trouble code with the Mercury Grand Marquis is P0172. This code number references a number given to you when you plug your car into an OBDII scanner. It’s not the most complicated OBDII trouble code to diagnose. It is also one of the most common. It means the motor is running rich. Mercury … Read more
One of the most common trouble codes with the Mercury Grand Marquis is P0171. It indicates that your Mercury Grand Marquis is running lean on the bank one side. It’s the most common air/fuel mixture-related code. It’s not the most complicated OBDII trouble code to diagnose. It is also one of the most common codes. … Read more
P0141 is a very common OBDII code that occurs in the Mercury Grand Marquis. It is caused by a failure in one of the elements that heat the oxygen sensors, specifically bank 1 sensor 2, which is downstream from the catalytic converter. It technically stands for: The purpose of the heated element in the oxygen … Read more
P0135 is a very common OBDII code that occurs in the Mercury Grand Marquis. It is caused by a failure in one of the oxygen sensors heated elements, specifically bank 1 sensor 1. It technically stands for: The purpose of the heated element in the oxygen sensor is to quickly bring your O2 … Read more