P0403 is a very common trouble code. It is a generic code, which means that it has the same meaning for the Mercury Grand Marquis as it would any other vehicle. It affects the EGR (Exhaust Gas Recirculation System and technically means: P0403: EGR→ Circuit Malfunction A circuit malfunction implies that there is a wiring … Read more
With the Mercury Grand Marquis, P0404 is going to have the same meaning as it would in any other vehicle. It’s a generic powertrain code that stands for: P0404: EGR Circuit → Range/Performance While there are several issues that can throw the P0404 code in the Grand Marquis, the most common issue is either going … Read more
The Mercury Grand Marquis utilizes a crankshaft position sensor in order to regulate the engine timing. This sensor uses a reluctor to gauge the position of the crank. When the Grand Marquis’s ECM determines that there is an issue with the signal coming from this sensor, it’ll throw the P0335 trouble code. P0335 Symptoms: … Read more
P0138 is a common OBDII code that occurs in many vehicles, including theMercury Grand Marquis. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself There are also some less likely … Read more
P0133 is a common OBDII code that occurs in many vehicles, including theMercury Grand Marquis. The code is triggered when there is an issue with the response time from the oxygen (O2) sensor when switching voltage levels. The O2 sensor is responsible for helping the ECM meter oxygen levels in the exhaust in order … Read more
P0132 is a common OBDII code that occurs in many vehicles, including the Mercury Grand Marquis. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. The air fuel sensor stays in rich biased mode for too long. There are also some less likely problems that … Read more
The P0131 code is an OBD-II diagnostic trouble code that indicates low voltage in the Mercury Grand Marquis’s Oxygen (O2) sensor circuit for Bank 1, Sensor 1 (B1S1). This sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the Grand Marquis’s … Read more
P0330 is a powertrain OBDII trouble code that has the same meaning for the Mercury Grand Marquis as it would any other vehicle. By definition, it means that the vehicles ECM/PCM isn’t getting the proper signal from the knock sensor. Clearing this code typically requires a new knock sensor. The second most common cause is … Read more
A trouble code is a signal that is generated by an automatic transmission system whenever it detects an issue in the Mercury Grand Marquis that requires your attention. The P0700 code is a general code that is typically accompanied by another code that specifies the specific problem. This code is part of the OBDII system … Read more
P0130 is a very common OBDII code that occurs in the Mercury Grand Marquis. It is typically caused when the Oxygen Sensor voltage is not within normal operating conditions. Mercury Grand Marquis P0130 Symptoms Typically, the only symptom of P0130 is going to be the service engine soon light. In some cases, there can be … Read more