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Mazda
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2003
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MPV ES
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P0116: Engine Coolant Temperature Circuit - Performance Problem
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Possible Causes
Possible Causes
Engine Coolant Temperature (ECT) sensor malfunction.
Faulty connection at ECT sensor or PCM harness connectors.
PCM malfunction.