Mercury Mountaineer P1000: OBD Readiness Test Not Complete

P1000 is a manufacturer specific trouble code.  In the case of Ford vehicles manufactured by Ford (including the Mercury Mountaineer), 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 OBD-II … Read more Mercury Mountaineer P1000: OBD Readiness Test Not Complete

Mercury Mountaineer Radiator Leaking:  Symptoms + Diagnosis

  Your Mercury Mountaineer’s cooling system passes antifreeze throughout its engine.  The main parts of the system are the thermostat, radiator, water pump, coolant itself, and the hoses.  If any of these parts go bad, you may experience radiator a leak.  A radiator leak is very common.  You should notice the leak directly under your … Read more Mercury Mountaineer Radiator Leaking:  Symptoms + Diagnosis

Mercury Mountaineer Bad Starter → Symptoms & Diagnosis

  One of the most common problems that can occur in the life of a vehicle is a bad starter, that includes the Mercury Mountaineer.  It is important to determine whether or not it’s a bad starter that is keeping the vehicle from turning over. If your Mountaineer is not starting, don’t assume right away … Read more Mercury Mountaineer Bad Starter → Symptoms & Diagnosis

Mercury Mountaineer: P0720 → OSS Circuit → Malfunction

P0720 is a generic OBD II trouble code, which means that it has the same meaning for your Mercury Mountaineer as it would any other vehicle.  It indicates that your Mountaineer’s OSS (Output Shaft Speed Sensor) is reporting a malfunction. It’s typically caused by a bad OSS, or a wiring problem. The OSS works by … Read more Mercury Mountaineer: P0720 → OSS Circuit → Malfunction

Mercury Mountaineer P0520: Oil Pressure Switch/Sensor → Circuit

  P0520 is a common OBD2 trouble code.  It’s generic, which means that it has the same meaning for the Mercury Mountaineer as it would any other vehicle.  P0520 indicates that the oil pressure sensor is operating outside of its normal “range”.  It is typically caused by a bad oil pressure sensor switch or a … Read more Mercury Mountaineer P0520: Oil Pressure Switch/Sensor → Circuit

Mercury Mountaineer P0108:  MAP Barometric Sensor → High Input 

  P0108 is a generic OBD-II trouble code.  It indicates your Mercury Mountaineer’s MAP (manifold absolute pressure) sensor’s voltage reading is outside of the normal operating range.  The voltage is too high.  It’s most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming into … Read more Mercury Mountaineer P0108:  MAP Barometric Sensor → High Input 

Mercury Mountaineer P0443: EVAP System Purge Control Valve Circuit – Malfunction

P0443 is a very common OBD2 code.  It’s generic, which means that it has the same meaning for the Mercury Mountaineer as it would for any other vehicle.  If your Mountaineer has this code, it is indicating the EVAP purge control valve circuit is malfunctioning..  This is typically caused by a short in the wiring … Read more Mercury Mountaineer P0443: EVAP System Purge Control Valve Circuit – Malfunction

Mercury Mountaineer P0521: Oil Pressure Sensor Switch → Performance/Range

P0521 is an OBD2 diagnostic code that is triggered when your Mercury Mountaineer detects that the value being sent from the oil pressure sensor is out of its normal operating range. It is typically caused by a bad oil pressure sensor or an issue with the oil system, and should be diagnosed and fixed right … Read more Mercury Mountaineer P0521: Oil Pressure Sensor Switch → Performance/Range