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P1620 Diagnostic Trouble Code Discussion for August 2010

Low Engine Coolant Switch Circuit Low Input

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Trouble Ticket Help Requests for DTC P1620
Help Request Posted
2000 Volvo S70 2.4L Poor Idle Quality, Hesitation, Surge, MIL Lamp on, multiple codes VIN: YV1LS61J8Y
No prior history with this vehicle. Towed to me with blown headgasket, battery dead. No prior knowledge of hwo this vehicle ran BEFORE I got my hands on it. Replaced head gasket and related components. Started engine and immediately had a quick idle surge. Eng...
August 01, 2010