Q: Temperature gauge does not work - 1998 Mercury Grand Marquis

asked by on

Replaced temp sending unit but temp gauge does not work. I ground sending unit at plugin and temp gauge needle pegged to (H) hot. Thinking gauge works. So I replaced sending unit, gauge still does not work at normal operating temp. Thermostat works well and cooling fan works as expected. I do not have an overheating problem. Just temp gauge not working. I do have 9.5 voltage at sending unit plug. I believe problem is between plug in and gauge, not grounding. Gauge did move when I provided a ground from the battery. Just need your second opion. Hope I provided enough info.

My car has 173000 miles.
My car has an automatic transmission.

You will need to test the computer to scan for data of the temperature sensor to see if the computer is reading the correct temperature as tested externally on the coolant sensor. If the sensor is not accurate then replace the sender. If the sender is accurate then you will need to have the temperature gauge replaced.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Temperature gauge does not work - 1998 Mercury Grand Marquis

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Head gaskets

The majority of the top end of the motor will in fact need to come apart in order to replace head gaskets. However, this would not necessarily be true for replacing only the timing belt.

Q: Coolant thermostat sensor 2008 c300 benz

Your temperature sensor is going to be located behind the engine on the driver side. You will need to remove the engine cover and you will need a torx bit (30) to remove the sensor. You can find the info...

Q: Runs rough and misfires

Hello. The trigger system that your codes may be referring to could be the crankshaft or camshaft position sensors. Many engine management systems use these signals as a trigger point for their ignition systems. It could be possible that there...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.