Comments on: 5 Symptoms of a Bad Coolant Temp Sensor (and Replacement Cost)

By: Sean

Sean — Mon, 29 Aug 2022 17:35:11 +0000

In reply to Denise. Generally a bad coolant temperature sensor throws a code. Do your fans kick on while you've been idling for a while? That is completely normal. There's no airflow across the radiator so the fans have to do the job when you're not moving forward.

By: Denise

Denise — Fri, 26 Aug 2022 07:11:44 +0000

My 2015 Chevy Traverse has these symptoms. However, the fan kicks on randomly, and stays on. My question is… if the heat shield has been removed from the wires, can the wires get fried and result in a faulty coolant temp sensor?

By: Robin

Robin — Sun, 21 Aug 2022 15:21:06 +0000

2015 Buick Enclave, I have had a myriad of issues lately with the most irrigating being the a/c when engaged the button blinks 3 times and doesn’t turn on the a/c. Research indicates coolant temp sensor that I have replaced with the same result. Further research states an ignition switch can cause problems with accessories too. It is a quick repair and cost $35 or less pending the type. I did replace it along with swapping out 2.5 year old battery for a new one. This did remedy intermittent voltage spikes to the ignition coil and the engine is running smoother but the a/c is still failing at times. When it does work, it will run you out of the car but the intermittent failure gets old quick here in Houston Texas. Any thoughts to a remedy for this issue? I have heard to check cabin filter and possibly evaporator issues, let me know what you think.

By: Sean

Sean — Thu, 19 May 2022 16:03:06 +0000

In reply to Walker. Sounds like a bad wire or ground. A bad coolant temperature sensor shouldn't cause your car to shut off like that. Check the wiring that is shared between the fuel injectors and the coolant temperature sensor. Perhaps they share a common ground, or you may find an obvious short or problem with the wiring.

By: Walker

Walker — Wed, 18 May 2022 17:23:14 +0000

In my 2003 Camry, my car would randomly shut off while driving(only while slowing down to a light) and a the code p0118 would appear. I replaced the thermostat sensor first, then alternator and battery as a mechanic suspected that could do it. (Battery was bad and was under warranty). Was still happening, replaced the thermostat and after a week the engine light came on and and shut off twice, but hasnt happened for a month or two.
The temperature gauge will say -40C(which indicates either a faulty wire or computer) when driving when suddenly it will start working again and say the temperature is 90C (which it should be) after a few minutes of driving the temp will say -40C again. question is, it would not be a faulty wire as that would make it stay at -40C correct? so it would have to be something with the computer? correct?

By: Sean

Sean — Mon, 25 Apr 2022 15:37:49 +0000

In reply to Bret.

That is a lot of misfires. I highly doubt the coolant temperature sensor would cause this. A bad coolant temperature sensor will often throw a single code, and it’s probably not going to be a misfire.

That sounds more like an issue with the fuel or ignition systems to me. Check to make sure you’re running the correct fuel and make sure your ignition coils are good.

By: Bret

Bret — Sun, 24 Apr 2022 17:08:18 +0000

Have a 2006 audi s4 with the 4.2 v8 engine . The car runs fine at cold start up and once it warms up it throws a code 0300 , 0301, 0304, 0305 , and 0308 and 0431 and 0421 cat effitioncy bank 1 and2 would the coolant sensor cause all these codes if it’s bad ?

By: Malinda Varnum

Malinda Varnum — Tue, 30 Nov 2021 15:36:58 +0000

I’ve replaced several sensors and still have these 5 systems, just ordered it hope it fixes my issues finally, thank you so much for your details of exactly what my car is doing.

By: Sean

Sean — Mon, 29 Nov 2021 21:22:51 +0000

In reply to samuel. Thanks Samuel, glad you enjoyed it.

By: samuel

samuel — Fri, 26 Nov 2021 07:06:54 +0000

like your information