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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Engine Controls (Diagnostics) (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0126 Insufficient Engine Coolant Temperature For Stable Operation >> Trouble Symptom

DTC P0126 Insufficient Engine Coolant Temperature For Stable Operation: Trouble Symptom

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode < Refer to OPERATION , Clear Memory Mode.>, and Inspection Mode < Refer to PROCEDURE , Inspection Mode.>.
DIAGNOSIS PROCEDURE

Step Check Yes No
1 CHECK ENGINE COOLANT TEMPERATURE SENSOR. 
  1. Disconnect the connectors from the engine coolant temperature sensor.
  2. Measure the resistance between engine coolant temperature sensor terminals when the engine coolant is cold and after warmed up.

    Terminals 

    No. 1 - No. 2: 

 Is the resistance of engine coolant temperature sensor different between when engine coolant is cold and after warmed up? Repair the poor contact of ECM connector. Replace the engine coolant temperature sensor. < Refer to ENGINE COOLANT TEMPERATURE SENSOR . >
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