On a Honda CR-V, the term temperature sensor can refer to several different components that monitor temperature for engine cooling, air intake, and outside air. The three most common sensors are the engine coolant temperature sensor (ECT), the intake air temperature sensor (IAT), and the outside air temperature sensor (OAT). The exact location depends on the model year and engine, so locate the right one for your vehicle’s year.
Types of CR‑V temperature sensors and where they sit
Engine coolant temperature sensor (ECT)
The ECT is typically mounted on the engine block near the thermostat housing or along the cylinder head. It may be threaded into the water jacket and usually has a two‑wire electrical connector. Location varies by generation, but the general rule is close to the upper radiator hose or thermostat region.
Intake air temperature sensor (IAT)
The IAT is generally located in the intake path and measures the temperature of incoming air. In most CR‑V models it sits in the intake duct just upstream of the throttle body or inside the Mass Air Flow (MAF) housing. Some engines combine the IAT with the MAF sensor.
Outside air temperature sensor (OAT)
The OAT sensor reports ambient temperature to the climate control system and instrument cluster. On most CR‑Vs, it sits behind the front bumper on the passenger side, tucked in the lower grille or behind the bumper cover near the radiator. In some generations the sensor may be in the bumper assembly or behind the grille near the radiator support.
How to locate the sensor on your exact CR-V model
Use these steps to identify the sensor for your particular year and engine. This quick guide helps you avoid digging around the wrong area.
- Identify which temperature sensor you’re dealing with (ECT, IAT, or OAT) based on symptoms or service notes.
- For ECT: look along the engine block near the thermostat housing or water outlet; check for a two‑wire plug on a small sensor screwed into the metal.
- For IAT: inspect the air intake tube from the air filter box to the throttle body; the IAT is often integrated with or very near the MAF sensor.
- For OAT: inspect the front bumper area on the passenger side behind the grille or bumper cover where a small two‑wire sensor sits in a protected housing.
- When in doubt, consult the owner's manual or a Honda service manual for your specific year and engine code, as locations can vary slightly.
After locating, if you’re diagnosing a sensor fault, consider verifying with the vehicle’s diagnostic codes (OBD‑II) or testing with a multimeter, and replace only with the proper OEM part to avoid sensor misreadings.
Summary
In the Honda CR-V, the temperature sensors fall into three main categories: engine coolant temperature (ECT) near the thermostat housing on the engine block, intake air temperature (IAT) in the intake path near the throttle body or MAF housing, and outside air temperature (OAT) behind the front bumper on the passenger side. Exact positions can vary by generation, so when in doubt, check the owner's manual or service manual for your specific model year and engine. Understanding these locations helps with maintenance, diagnostics, and climate control reliability.