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Frequently asked questions about cars and motorcycles

The Solution for Fault P199D on Skoda Karoq

Model: Skoda Karoq MK 1 - Years 2017-2026
Part: Warning light – error code

The video highlights a crucial and often overlooked point regarding fault P199D (engine temperature regulation thermostat; open circuit) on the Skoda Karoq (also applicable to Seat Ateca and Volkswagen Tiguan). The code indicates an open circuit in the thermostat valve, but the most common cause is not a fault in the thermostat itself, but a wiring issue. The thermostat is located on the left side of the EA288 engine (looking from the front) at the bottom, near the timing belt, and has a 2 or 4 PIN electrical connector; follow the wiring harness from the thermostat connector, where it passes near contact with the exhaust manifold or other hot or sharp components. Look for signs of fraying or burns, where the harness rubs against a metal bracket or engine mount. Use a multimeter to measure an out-of-spec value; an infinite value (open circuit) confirms the component's failure.

Posted on 3 July 2026 by ScegliAuto

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