Smart (451) 1.0 - motor no. 132910/132930 - 2007/2015
MIL engine light on
In engine control unit diagnosis, errors are detected: P20B1 Coolant shut-off solenoid valve. Electrical fault or open circuit.
We advised the workshop tech to check for engine coolant leaks from the coolant pipe or valve. Having detected leaks, we finally solved the problem by replacing valve and tubing.
Solved!
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