When you start your Mercury Mariner, the OBD-II system runs a self diagnostic check on all major systems. If any of these checks fail, you will see a diagnostic warning light on the dash for the corresponding system. When the SRS system fails this check, you’ll see the SRS light. SRS stands for supplemental … Read more
P1000 is a manufacturer specific trouble code. In the case of Ford vehicles manufactured by Ford (including the Mercury Mariner), 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
A leaking radiator in a Mercury Mariner can cause the engine to overheat, leading to costly damage like a bad head gasket or a cracked head if not addressed immediately. Ignoring a radiator leak can result in costly repairs and long-term engine damage. Identifying the symptoms of a radiator leak in your Mariner will help … Read more
One of the most common problems that can happen to a vehicle is a heater core leak. If your Mercury Mariner has a leaking heater core, it is not a breakdown risk. Although, it is necessary to make sure that the lost coolant is replaced. It can cause damage to the vehicle in other ways, … Read more
One of the most common problems that can occur in the life of a vehicle is a bad starter, that includes the Mercury Mariner. It is important to determine whether or not it’s a bad starter that is keeping the vehicle from turning over. If your Mariner is not starting, don’t assume right away … Read more
P0720 is a generic OBD II trouble code, which means that it has the same meaning for your Mercury Mariner as it would any other vehicle. It indicates that your Mariner’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
P0520 is a common OBD2 trouble code. It’s generic, which means that it has the same meaning for the Mercury Mariner 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
P0108 is a generic OBD-II trouble code. It indicates your Mercury Mariner’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
P0443 is a very common OBD2 code. It’s generic, meaning it has the same definition for the Mercury Mariner as any other vehicle. If your Mariner has this code, it indicates the EVAP purge control valve circuit is malfunctioning. This is typically caused by a short in the wiring to or from the purge … Read more
P0521 is an OBD2 diagnostic code that is triggered when your Mercury Mariner 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