Where is the coolant temperature sensor located on the Audi Q7 3.6?
2 Answers
The coolant temperature sensor on the Audi Q7 3.6 is located at the engine outlet pipe. Composition of the coolant temperature sensor: The water temperature and level sensor consists of a thermostat section and a water level control section. It is also equipped with a pressure reducing device before the electric valve and a rotary muffler heater for heating. Function of the coolant temperature sensor: The function of the coolant temperature sensor is to convert the coolant temperature into an electrical signal. After input to the ECU, it can: adjust the fuel injection quantity (increased during low temperatures); correct the ignition timing (advanced during low temperatures and delayed during high temperatures to prevent knocking); influence the idle control valve (the ECU controls the idle control valve based on the coolant temperature signal to increase idle speed during low temperatures); and affect the EGR valve.
I've worked on quite a few Audi Q7 3.6 models, and that coolant temperature sensor is usually tucked away at the rear of the engine. You'll need to pop the hood, remove the plastic cover first, then look near the cylinder head – it's particularly easy to spot with its wiring harness connector attached. Sometimes it sits right next to the thermostat. From my experience, several units were positioned at the right rear corner of the engine block, but heads up: there might be slight variations between 2006-2009 models and later versions. Crucial reminder: always replace it when the engine is cold! Last time a buddy forced it off on a hot engine, got antifreeze sprayed all over himself – screamed like a boiled lobster! Honestly, if you're unsure, the safest bet is to snake your phone in there for a quick snapshot.
