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2006 audi a4 coolant temp sensor?

What happens when your coolant temperature sensor goes bad?

If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will reduce fuel economy, and may hinder engine performance.

What are the signs of a bad temperature sensor?

What Signs May Signal Your Coolant Temperature Sensor May Be Failing?

  • Poor Fuel Economy.
  • Irregular Temperature Readings.
  • Black Smoke from Your Exhaust.
  • Your Engine is Overheating.
  • Your Check Engine Light is On.

How do I know if my coolant temperature sensor is working?

You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. Look at the front of the engine block in the middle of the pulleys. You will see a small terminal sticking out of the block with a wire lead coming from it. This is your coolant temperature sensor.

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Can you drive with a faulty coolant temperature sensor?

Faulty readings from the coolant temperature sensor can cause your car’s engine to miscalculate the fuel to air mixture within the engine. If the amount of black smoke emitting from your car is excessive, then you should not drive your car and you should tow your vehicle to a mechanic.

Is there a fuse for coolant temperature sensor?

There will be a fused wire with voltage to the instrument cluster (your owners manual should indicate which fuse), but the temperature sensor is providing a variable “resistance to ground,” which the temperature gauge in the dash is reflecting.

How much does it cost to replace a coolant temperature sensor?

The average cost for engine coolant temperature sensor replacement is between $123 and $158. Labor costs are estimated between $82 and $104 while parts are priced between $41 and $54.

How long does a coolant temperature sensor last?

Often, the engine coolant temperature sensor must be replaced at about 100,000 miles. If you don’t properly maintain the engine cooling system, the sensor could fail much earlier.

Can a bad coolant temperature sensor cause car not to start?

The sensor will not cause a no start. It could cause a hard start and a rich or lean condition only.

How do you change a coolant temperature sensor?

How to Replace a Coolant Temperature Sensor

  1. A video of this job being done is at the bottom of this guide.
  2. Release the Cooling System Pressure.
  3. Locate the Coolant Sensor.
  4. Remove the Electrical Connector.
  5. Remove the Coolant Sensor.
  6. Install the New Coolant Temperature Sensor.
  7. Refill the Cooling System.
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How do you know if your car thermostat is working?

Start your car’s engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.

Can a bad coolant temp sensor cause rough idle?

A faulty coolant sensor that always reads cold may cause the fuel control system to run rich, pollute and waste fuel. A coolant sensor that always reads hot may cause cold driveability problems such as stalling, hesitation and rough idle. This also affects engine performance and fuel economy.

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