Q: OBD message "insufficient coolant temp for closed loop"

asked by on February 25, 2017

I replaced sensor with 2 leads but still get message, replaced thermostat but still get message. I'm wondering if the sensor with 1 wire ( for dash gauge??) being faulty would generate the same message ? Gauge is reading on dash but could it still be messing up the ecu ? car seems to run and idle fine!!!!

My car has 135000 miles.
My car has an automatic transmission.

It appears that your vehicle uses two separate sensors. One would be for the temperature gauge on the dash, while the other one is used for the signal to the control module. The sensor for the control module should be a two wire sensor, appears to mount on the back side of the intake manifold/block. I’m sure you have already checked it, but I would also like to point out that you need to be sure that the coolant is full, or the incorrect reading will be supplied to the control module, even if the sensor is working properly. If you feel you could use some help in identifying and/or repairing the problem, contact a certified mechanic, like the mobile mechanics available at YourMechanic.com.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

p0420

A vehicle with 182,000 miles is likely due for a catalytic converter. Most of the time it does mean you need a new catalytic converter. But there are a couple of other things that are prudent to take a look...

How do I use the auto anti-glare rear view mirror?

The rear view mirror is an important safety feature that allows you to see what is happening behind your vehicle. At night, however, the glare from the headlights of vehicles behind you can diminish your visibility and your safety. The...

Why does my car shake at 60 mph

The tires, tie rods, and rack and pinion are the most common areas to look at for a vibration in the front end. The tires may be out of balance or have a stop leak inside one of them. The...

Car shut off when driving, 2009 Toyota Camry

Has the Check Engine Light illuminated after the stall? A loose battery connection can cause abnormal problems on many vehicles. Have the battery and charging system tested for issues and check your maintenance schedule to make sure services are up...

I have Spotify account can I use that in my new Prius with out useing it through my phone by just inputting my account number. How

Hello. According to my research it appears that Spotify can only be used with your vehicle by connecting it with your smartphone. Spotify can be used by connecting your phone to the vehicle via a USB cable, or by syncing...

How do I empty the ashtray?

The ashtray is located directly in front of the shift lever. To access it, pull the lid out to open. The ashtray can then be pulled straight out until it is removed from the vehicle, at which point it can...

Car revved & lurched over curb while foot was on brake

Hey there, hopefully everyone was safe after this experience. My suggestion would be to have the vehicle towed to the nearest dealer to have the vehicle checked. There has been many possible complaints for this problem with other owners and...

Black smoke and rich fuel the codes P0191 & P0452 and short trim bank 1 & 2. Both at -28.9

Hello. You have 2 separate problems here. The P0191 (fuel rail pressure sensor circuit problem) may just be a symptom - it is reporting suspect fuel pressure on the rail. The fuel pressure on the rail is controlled by the...

Engine smoked and had unpleasant odor on 2013 Toyota Prius V

Hey there thanks for writing in about your 2013 Toyota Prius V. It sounds like you had a coolant leak and caused the engine or electrical motor to overheat and shut down. If you would like to have this looked...

Related articles

A Buyer’s Guide to the 2012 Toyota Prius C
Car Car buyers in the market for a sub-compact car with a low price tag should really take a look at the 2012 Toyota Prius C. Toyota led the way with hybrid technology when they first introduced the Prius, and...
Symptoms of a Bad or Failing EVP Position Sensor
Common signs include poor cold start performance, the Check Engine Light coming on, and failing an emissions test.
Essential Things to Know About the Toyota Prius Hybrid Car
The Toyota Prius first came out in 1997. The current Prius gets 58 miles per gallon and can travel a mile without any gas when it's in EV mode.