Problem Reports
Problem with your car? See what our experts say or submit your own.
2009 Mercury Mariner Hybrid Problems
Coolant Pump on Hybrid May Fail and Cause CEL/Engine Shutdown
The hybrid models have a coolant pump that cools control electronics. The pump can fail or spin slowly, which causes a Check Engine Light to illuminate and complete engine shut down.
Hard driving conditions may cause rear motor mount to crack
Hard driving conditions, including quick starts from a stop and hard acceleration up hills, can cause the rear motor mount to crack. The broken motor mount needs to be replaced, otherwise damage to the hybrid drive system may result.
Check Engine Light With Code P0442, P0456, and/or P1450
The Check Engine Light may illuminate with code P0442, P0456, and/or P1450. These codes are related to the EVAP system. Our technicians tell us that if no EVAP system faults are confirmed, updated software is available for the powertrain control module (PCM) which should correct this concern.
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