The coolant temperature sensor on a 2007 Honda Accord is mounted in the engine block near the thermostat housing on the passenger side.
In 2007, the Accord offered both a 2.4-liter four-cylinder and a 3.0-liter V6, and while the exact orientation can vary, the sensor is consistently located near the thermostat outlet with a two‑pin electrical connector. This sensor helps the engine computer regulate fuel, timing, and cooling management based on engine temperature.
Location by engine option
Use these cues to spot the CTS on your specific engine, keeping in mind that orientation may differ slightly between the 2.4L and the 3.0L.
- 2.4-liter four-cylinder: Located on the passenger side of the engine block near the thermostat housing. Look for a small sensor threaded into the water jacket area just above the upper radiator hose; it will have a two-pin electrical connector.
- 3.0-liter V6: Also near the thermostat housing, typically on the front or side of the engine block close to the water outlet. It is a small threaded sensor with a two-pin connector.
If you can’t see the sensor from the top, you may need to peek from the passenger-side wheel well area or remove nearby covers to gain access. Ensure the engine is cool before attempting any inspection or disassembly.
Accessing and replacing the CTS
Here are general steps to access or replace the CTS. The exact method can vary by model year and trim, so adjust as needed and refer to the service manual if available.
- Disconnect the negative battery terminal to prevent shorts.
- Relieve any coolant pressure and, if necessary, drain a small amount of coolant from the reservoir to prevent spills.
- Unplug the CTS electrical connector by pressing the locking tab and pulling the connector away from the sensor.
- Use the appropriate wrench to unscrew the CTS from its port in the engine block or cylinder head. Note the orientation for the replacement sensor.
- Install the new CTS with proper sealing, tighten snugly but do not overtighten, then reconnect the electrical connector.
- Refill or top off coolant, bleed the cooling system if required, reconnect the battery, and start the engine to check for leaks and proper operation.
Understanding the CTS location helps with quick diagnostics and replacement, reducing downtime and ensuring accurate readings for the engine cooling system.
Summary: On a 2007 Honda Accord, the coolant temperature sensor is mounted in the engine block near the thermostat housing on the passenger side. Its exact position varies slightly between the 2.4L I4 and the 3.0L V6, but both versions place the sensor near the thermostat outlet with a two-pin connector. Access may require removing nearby components; replacement steps involve safe disconnecting, removing the sensor, installing a new one, refilling coolant, and verifying operation.
What is the code P2185 on a 2007 Honda Civic?
The P2185 code stands for “Engine Coolant Temperature Sensor 2 Circuit High.” It's logged when the PCM detects electrical faults in the ECT circuit. Various issues could trigger the code, like a malfunctioning ECT sensor, a failing PCM, and a bad connection in the #2 ECT sensor.
How to see if a coolant temperature sensor is bad?
Symptoms of a Bad Coolant Temperature Sensor
- Overheating Engine. If you notice that your engine overheats, the coolant temperature sensor could be the problem.
- Poor Fuel Economy.
- 'Check Engine Lights Turns On.
- Black Smoke Emitted from the Engine.
- Poor Idling.
- Defective Electrical Cooling Fans.
What color should Honda coolant be?
What Is the Coolant Color That Honda Vehicles Use? Honda Long Life is one of the most common Honda antifreeze coolant products and usually comes in a blue color for more modern vehicles; however, certain older Honda models may use green-colored coolant.
Where is the coolant temperature sensor located on a 2003 Honda Accord?
There's your tab. We're going to pull this harness out of the way. Using a 17 mm wrench we're going to loosen the temp sensor.