The P0440 code is a common trouble code that many Mercury Grand Marquis owners may encounter. It indicates that there is an issue with the car’s Evaporative Emission Control (EVAP) system. Specifically, the EVAP system is malfunctioning. A variety of causes can trigger the P0440 code, with the most common one being a loose or … Read more
One of the most common issues that happens with the Mercury Grand Marquis is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII scanner and pertains to the emissions system. While it’s unlikely to cause a breakdown, it can be bothersome and may result in a failed emissions test for … Read more
P0500 is a OBDII trouble code that affects the Mercury Grand Marquis‘s Vehicle Speed Sensor (VSS). The VSS sends a signal to the engine’s computer letting it know how fast that the vehicle is going. The Grand Marquis uses this signal for many vehicle functions. It helps control transmission shifts, ABS, cruise control, the speedometer, … Read more
A somewhat common issue with the Mercury Grand Marquis is the P0449 code. This code references a number that is given to you when you plug it into a OBD2 scanner. P0449 deals with the evaporative emissions control (EVAP) system. It often appears with, or is related other codes, such as P0420, P0446, and very … Read more
P0455 in the Mercury Grand Marquis is a trouble code that indicates your truck has a LARGE evaporative emissions leak. With this code, you shouldn’t notice any symptoms besides perhaps a noticeable fuel smell. P0455 usually is not an immediate threat to the driveability of your Grand Marquis. But, whenever the check engine light is … Read more
One of the most common trouble codes with the Mercury Grand Marquis is the P0496 code. This code number references a number that is given to you when you plug your Grand Marquis into an OBDII scanner. Below, you’ll find the most common symptoms and ways to diagnose the P0496 in your Mercury Grand Marquis. … Read more
P0161 is a very common OBDII code that occurs in the Mercury Grand Marquis. It is typically caused by a failure in one of the elements that heat the oxygen sensors, specifically bank 2 sensor 2. Replacing the Oxygen sensor will fix the problem a majority of the time. Some of the other causes of … Read more
P0155 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 2 sensor 1. The purpose of the heated element in the oxygen sensor is to quickly bring your O2 sensor up to normal operating temperature … Read more
P0175 is a common trouble code that can appear in the Mercury Grand Marquis. It’s generic, so it has the same meaning for your car as it would any other automobile. There are MANY issues that can cause P0175 in the Grand Marquis. If there are other codes present, use them to eliminate potential causes … Read more
P0441 is one of the more common OBD II codes that can occur in the Mercury Grand Marquis. It is frequently caused by a loose or bad gas cap, cracked or disconnected EVAP system hoses, vacuum leaks, or a bad purge valve. Always start by taking a look at the gas cap. P0441 is related … Read more