The engine coolant temperature sensor (CTS) is the sensor most CR-V owners ask about, and on a 2002 CR-V it sits in the engine block near the thermostat housing. Other temperature sensors you may encounter include the outside air temperature sensor behind the bumper and the intake air temperature sensor on the intake tract.
Primary temperature sensor locations on the 2002 CR-V
The following list highlights the main temperature sensors you might need to locate or test on a 2002 CR-V. Use this as a quick reference before diving into your diagnosis.
- Engine coolant temperature sensor (CTS) — located on the engine block near the thermostat housing; typically has a two-pin electrical connector and threads into the engine water jacket.
- Outside air temperature sensor (OAT) — usually mounted in the front of the vehicle, often behind the bumper or in the grille area on the passenger side; it’s a small two-wire sensor exposed to ambient air.
- Intake air temperature sensor (IAT) — mounted on the intake manifold or on the intake tube near the throttle body; generally a small sensor with a two-wire connector used by the ECU to gauge intake air temperature.
Understanding where these sensors live helps you diagnose temperature-related symptoms, such as incorrect temperature readings, poor fuel economy, or faulty climate control behavior. If you suspect a bad sensor, consult the service manual for testing procedures or use a multimeter to verify resistance or voltage values in the specified range.
Engine coolant temperature sensor (CTS)
The CTS is the key sensor for the engine’s cooling system readings. In a 2002 CR-V, it is typically found screwed into the engine block or cylinder head near the thermostat housing, on the side of the engine bay that provides access to the water jacket. It has a two-pin harness and a compact plastic or metal body that threads into the cooling system.
Location details
Look for a small sensor with a two-wire connector threaded into the engine block or near the thermostat housing. It may sit just above or beside the upper radiator hose area, depending on exact engine layout for your vehicle’s VIN and regional spec.
How to test or replace
With the engine cool, disconnect the wiring harness and inspect the sensor for corrosion or damage. Use the vehicle’s service manual as a guide for the correct resistance values at specified temperatures, or perform a live readout with an OBD-II scanner that can show coolant temperature. Replace the CTS if readings are out of spec or if the sensor shows physical wear.
Outside air temperature sensor (OAT)
The outside air temperature sensor informs the climate control system and the engine management software about current ambient air conditions. On the 2002 CR-V, it is typically located toward the front of the vehicle, behind the bumper or in the grille area on the passenger side, sometimes tucked into the bumper cover or near the radiator support.
Location details
Access may require removing part of the bumper or splash shield to reach the sensor. The sensor is a small two-wire device that protrudes into the incoming air stream to read ambient temperature.
How to test or replace
Inspect the wiring and connector for damage or corrosion. If your outside temperature display or climate regulation seems off, test the sensor’s resistance with the vehicle at a known ambient temperature or swap in a known-good unit to verify availability of correct readings.
Intake air temperature sensor (IAT)
The intake air temperature sensor helps the engine computer calculate air density and adjust fueling. On many 2002 CR-V models, the IAT is mounted on the intake manifold or on the intake tube near the throttle body, sometimes integrated with an MAF/sensor assembly.
Location details
Look for a small sensor inserted into or adjacent to the plastic intake manifold or ducting. It will have a two- or three-wire connector depending on the exact configuration of your engine.
How to test or replace
Disconnect the harness and inspect connections for looseness or corrosion. Testing typically involves comparing resistance values at different temperatures or temporarily swapping a known-good sensor while monitoring engine performance and ECU adaptation.
Summary
For a 2002 Honda CR-V, the temperature sensors you’re most likely to encounter are the engine coolant temperature sensor (CTS), the outside air temperature sensor (OAT), and the intake air temperature sensor (IAT). The CTS is the one most commonly referenced for engine cooling and ECU readouts, located on the engine block near the thermostat housing. The OAT sits near the front of the vehicle behind the bumper or in the grille area, and the IAT resides on the intake manifold or intake tube. Accurate identification and testing of each sensor ensure reliable temperature readings for engine management and climate control.
Endnote
If you’re unsure about a sensor’s identity, consult your CR-V’s owner manual or a service manual for exact locations based on your VIN, as production changes can shift sensor placement between sub-models and regions.