Parts for your 2007 Honda Cr-v-Temperature sensors

2007 Honda CR‑V Temperature Sensors

Temperature sensors are absolutely fitted to the 2007 Honda CR‑V. Honda’s factory Service Manual and Electrical Troubleshooting Manual for this model note several temperature inputs, including the Engine Coolant Temperature (ECT) sensor to the PCM, an Intake Air Temperature (IAT) sensor, an A/C evaporator temperature sensor, ambient air temperature for the climate system, and (on autos) a transmission fluid temperature sensor. These are standard OBD‑II monitored components, with diagnostics covering typical codes such as P0116–P0119 for ECT behaviour.

On this CR‑V, the ECT sensor is the headline act. It reports coolant temperature so the engine computer can manage cold‑start fuelling, ignition timing, idle speed, radiator fan control, A/C cut‑out under load, and closed‑loop operation. The IAT sensor fine‑tunes fuelling as the weather changes, while the HVAC sensors help keep the cabin comfy without fogging the windscreen. Automatic models also rely on transmission temperature to adjust shift quality and protect the gearbox when things get toasty.

These sensors aren’t a routine “replace by kilometres” item, but they do appreciate a bit of care during servicing. Keeping the cooling system healthy with the correct Honda Type 2 coolant (blue) or an equivalent silicate‑free premix, and changing it at the recommended interval, protects the ECT sensor from corrosion and scale. During a service, a quick scan‑tool check is handy: cold ECT should read close to ambient, then climb smoothly to about 85–95°C at operating temp. Any jumpy readings suggest the sensor or its connector needs attention.

If replacement is on the cards, do it with the engine stone cold. Depressurise the system, drain a little coolant to drop the level below the sensor, unplug the connector, and swap the sensor and sealing washer/O‑ring. Don’t use thread tape unless Honda specifically calls for it, and don’t overtighten—just snug to seal. Refill with the right coolant, bleed the system (heater on hot, cap off until the fans cycle), top up the overflow, clear any fault codes, and confirm stable temps on a scan tool.

• Common clues of a crook temperature sensor: hard cold starts, rich running, poor fuel economy, radiator fans that never come on or run constantly, erratic gauge behaviour, and a glowing MIL.

Note: The transmission temperature sensor on auto CR‑Vs is internal and not a routine service item. HVAC sensors are also service‑as‑needed rather than scheduled replacements.

Popular questions about 2007 Honda CR‑V temperature sensors

Where is the engine coolant temperature (ECT) sensor on a 2007 CR‑V?
It’s mounted on the engine, at the cylinder head/thermostat housing area near the upper radiator hose outlet. Access is from the top of the bay, unplug the connector and you’ll see the small threaded sensor body. Always work with the engine cold to avoid scalding coolant.

Do new ECT sensors need programming?
No. The ECT sensor is a simple thermistor. Once installed and the cooling system is bled, the PCM reads it straight away. It’s smart to clear any stored fault codes and verify the temperature reading with a scan tool during warm‑up.

What coolant should be used after ECT replacement, and how is bleeding done?
Use Honda Type 2 premix (blue) or an equivalent silicate‑free coolant approved for Honda aluminium engines. Fill to the neck, set the heater to hot, run the engine with the cap off until the fans cycle, top up as bubbles purge, then fit the cap and bring the overflow to the “MAX” line. Recheck the level after a short drive.