Bosh Motronic ME 7.1.1

Bosch Motronic ME 7, ME 7.1, ME 7.1.1, ME 7.5 System Strategy

Engine Coolant Temperature Sensor Stuck High (P0116) After engine start the system stores continuously the lowest and highest ECT above the thermostat control temperature for a driving cycle. In case that after several driving conditions the difference between ECT max and ECT min is lower than the threshold the sensor stuck at high values.

engine coolant temp.

max. stored temperature variation

fault decision

H1

L1

H2

Ln-1

Hn-1

Ln

Hn driving conditions

H: driving condition with high cooling performance (vehicle cruise) L: driving conditions with low cooling performance (idle)

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