P2197 is a general DTC code that indicates that the signal coming from your Mercury Grand Marquis’s first O2 sensor on the bank two side of the engine is stuck giving off a lean signal. The voltage reading from a normal oxygen sensor should look something like a heartbeat, whereas with P2197 the voltage looks like … Read more
P2195 is a general OBD2 code that indicates that the signal coming from your Mercury Grand Marquis’s 1’st O2 sensor on Bank 1 Sensor 1 is stuck lean. DTC P2195 is a general code, which means that it has the same meaning for any make, model, or year. It is most typically caused by a … Read more
P2272 in the Mercury Grand Marquis is a general diagnostic trouble code. It means that the “bank 2” downstream oxygen sensor (behind the catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture. This does not necessarily mean that the vehicle is running lean (although it can, but usually doesn’t). P2272 is … Read more
P2270 is a general DTC trouble code, which means it has the same meaning for the Mercury Grand Marquis as it would any other vehicle. It means that the oxygen sensor located on bank 1 behind the catalytic converter is continuously sending voltage that indicates a lean air/fuel mixture. This does not necessarily mean … Read more
P1131 is a diagnostic trouble code that applies to vehicles manufactured by Ford, including the Grand Marquis. Trouble codes that start with P1XXX were reserved for manufacturers. This code occurs when the upstream O2 sensor on bank 1 fails a diagnostic test twice in a row. P1131 Quick Facts DTC P1131 is usually caused by … Read more
P1151 is a diagnostic trouble code that applies to vehicles manufactured by Mercury, in this case the Grand Marquis. This code occurs when the upstream O2 sensor on bank 2 fails a diagnostic test twice in a row. DTC P1151 is usually caused by a bad oxygen sensor, fuel injector, or vacuum leak. But, there … Read more
Your Mercury Grand Marquis utilizes an evaporative emissions control (EVAP) system to migrate fuel vapors from the gas tank and fuel filler neck, and sends them to the engine to be burned off. When the pressure inside of the fuel tank is too high, P0453, is thrown and the check engine light comes on. If the … Read more
P0452 is a generic OBD II code that can occur in the Mercury Grand Marquis. It means that your Grand Marquis’s EVAP system has detected low fuel tank pressure. The evaporative emissions control system (EVAP) sends fuel vapors from the fuel tank to the intake manifold to be burned off. When the pressure in the … Read more
P2189 is a DTC code that can occur in your Mercury Grand Marquis. It indicates the air fuel mixture is too lean at idle, specifically in bank 2 (we’ll cover how to find bank 2 later). Its is different from the much more common P0174, which indicates that bank 2 is lean at any engine … Read more
P2187 is a DTC code that can occur in the Mercury Grand Marquis. It indicates the air fuel mixture is too lean at idle. The technical definition for P2187 “System Too Lean at Idle: Bank 1”. The code is thrown after your Grand Marquis’s oxygen sensor on Bank 1 (usually sensor 1) has detected that … Read more