Q: Engine fan non-stop running until you turn the ignition key off

asked by on

Hi My radiator fan keep running and make lots a noise.Error codes shows P2184 engine coolant temperature sensor circuit 2.I replaced it but problem still exist. Sensors, thermostat been replaced and new.What else could cause this trouble or what should I do. Need help. Thanks

My car has 130000 miles.
My car has an automatic transmission.

A P2184 code indicates temp sensor circuit low. That means the voltage that the ECU reads on the temp sensor is low. The ECU interprets this as a hot engine and turns on the fan. A short circuit in the harness to the sensor could also give this indication. If you continue to get this code, then the next step is a Pin-Test at the ECU Harness. If you are not still seeing the P2184, then another possibility is that the cooling fan relay is stuck. The relay is controlled by the ECU, but it is actually the part that switches the fan on and off. Testing procedures for either of these components go beyond the scope of this forum. By contacting YourMechanic, you could have a technician come to your home or office and perform the tests to determine what needs to be 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. Engine fan non-stop running until you turn the ignition key off

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: Airbag & seat belt signs come on and off continually

Hello there, A few different problems can cause airbags faults such as these. The most common problems are with the seat passenger sensor, wiring, or the seatbelt pretensioner. The wiring for the seatbelt can be very sensitive and any change...

Q: Q: Shaking

Shaking or vibrating at high speeds is often times related to tires that may be out of balance, low on air, potentially a badly aligned front end, failing suspension components or ball joints. When any of these things are not...

Q: Automatic transmission issues 2001 BMW X5

Hello - I would first check the wiring connector at the transmission for good contact and secure connection, and fuses for the transmission controller. It is possible that an internal speed sensor in the transmission has failed. I would recommend...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...