Coolant Pump on Hybrid May Fail and Cause CEL/Engine Shutdown: Mercury Mariner Electrical System

Problem overview

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.

56 people reported this problem

28 comments

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Mercury Mariner vehicles with this problem

5 model years affected

Average mileage: 97,532 miles

(36,700 - 185,000)

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Coolant Pump on Hybrid May Fail and Cause CEL/Engine Shutdown on Mercury Mariner

Problem overview

Mercury Mariner vehicles with this problem

Need a diagnosis? Trust our Mercury experts.

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Ask our experts about your Mercury.