Step2: Replace the coolant temperature sensor. Before anything else: Examine the wiring harness plug for the temp sensor. Use Mass Air Flow cleaner and a brush to clean the plug if there is any residue or corrosion. Plug the new coolant temp sensor into the wiring harness, and fit it back into the housing. However the normal engine temp should be in the range of 195 degrees to 220 degrees Fahrenheit. Though, most vehicles do not display the degrees of the coolant temp on the instrument cluster. They have markings that indicate low and high temperatures. In this type of reading on the instrument cluster, if the temp gauge needle Thecoolant temperature sensor , abbreviated as CTS, in your 2007 Audi Q7 is an important device that enables the control unit to give alerts if the engine is overheating or if the temperature within the system is rising for some reason. The Coolant Temperature Sensor's Function This device works on the principle of dependence of potential ServiceLocation. SELECT VEHICLE. Customer Ratings (228) How A Diagnostic Works. 2007 Audi Q7 V6-3.6L: Service type Temperature Warning Light is on Inspection: Estimate $94.99: Shop/Dealer Price $112.52 - $125.67: 2008 Audi Q7 V6-3.6L: Faulty coolant temperature sensor: The temperature sensor takes constant readings of the Causesof P2181 Engine Code. Bad Coolant Temperature Sensor (CTS) Stuck thermostat. Faulty water pump. Failed cooling fan or cooling fan control module. Bad electrical connector somewhere from the CTS to the ECU. We know this is a bunch of causes, but we’ll break it down to where you should start first. The most common causes 2018 3.0T SQ5/S4 coolant temp to high Fix (future reference) A valve can fail on top of the passenger cylinder head (N649) with a message on the dash coolant temperature to high. The valve is the coolant pump switching valve, The vehicle will overheat if driven. You can test this by removing the vacuum line on the front of the valve 72 Transmission control module (TCM) – in transmission. 73. Tyre pressure monitor control module. 74. Yaw rate/G-force sensor- under centre console. Fuse and relay location. Fuse box diagram. Identifying and legend fuse box Audi Q7 2006-2015. 1Battery Energy Control Module Trouble Codes: • P0513: Immobilizer Incorrect Key (1299) 2 Brakes Trouble Codes: • P0522: Engine Coolant Temp. Sensor (G62): Break in wiring / short circuit to positive (1314) • P01C9: Fuel Rail/System Pressure Bank 2 Too High (457) 2 Central Module Comfort System Trouble Codes: Thecoolant temp sensor is the one controlling gauges, ECM. The o rings stick to the sensor and the body. Put a wrench on the plastic wire housing and twist, that EngineCoolant Temperature Sensor on Radiator (G83) Removing Engine cold Briefly open the coolant reservoir cap to reduce the residual pressure in the coolant System. Carefully pull the engine cover - arrows - off the 4 bolts one after the other. Al Lay a cloth below to catch escaping coolant. Vehicles Built through 05.10 Disconnect the 9QVpN.