Mercury Mariner: High Oil Pressure → Causes + Diagnosis

If your Mercury Mariner is experiencing unusually high oil pressure, you need to find out what’s causing it right away. Unusually high oil pressure can indicate serious problems, such as a blocked oil passage, or a broken pressure relief valve.  It should be treated like you have no oil pressure until you verify what is … Read more

Mercury Mariner P0606:  ECM/PCM → Processor Fault

P0606 is a generic OBD II code.  Which means that it has the same meaning for the Mercury Mariner that it would for any other vehicle.  If your Mariner has P0606 it’s highly likely that the ECM/PCM (engine or powertrain control module, they mean the same thing) has failed. The PCM regularly performs a self … Read more

Mercury Mariner P0603: Keep Alive Memory → Error

P0603 is a generic OBD2 trouble code.  It indicates that your Mercury Mariner’s keep alive memory has had an error. Keep alive memory is the data that your Mariner’s PCM (Powertrain Control Module) has learned about how your engine conditions.  All of this sensor and driving input data is used to keep it operating efficiently. … Read more