Parts for your 2016 Toyota C-hr-Temperature sensors

2016 Toyota C‑HR temperature sensors — what they do and how to look after them

Temperature sensors are absolutely fitted to the 2016 Toyota C‑HR and they’re central to how the powertrain and climate systems behave. Toyota’s technical literature — including the C‑HR New Car Features (NCF), the Repair Manual on Toyota’s service information platform (TIS), the Electrical Wiring Diagram (EWD), and the Toyota Parts Catalogue (EPC) — documents several temperature inputs used by the Engine/Hybrid Control and Air‑conditioning ECUs. Typical diagnostic trouble codes listed in these manuals (for example P0117/P0118 for Engine Coolant Temperature, P0113 for Intake Air Temperature, and P0071 for Ambient Air Temperature) further confirm their presence and critical role.

On a 2016 C‑HR (1.2T petrol or 1.8 Hybrid), temperature sensors help the car warm up cleanly, keep fuel economy on point, and protect major components. The Engine Coolant Temperature (ECT) sensor tells the ECU how warm the engine is so it can trim fuel, ignition timing, and idle speed. The Intake Air Temperature (IAT), usually integrated with the MAF, lets the engine adjust for hot or chilly air. An Ambient Air Temperature sensor informs the climate control and can influence cooling fan logic. CVT models monitor transmission fluid temperature to manage shift feel and protect the unit. Hybrid variants add battery temperature sensing to balance performance and longevity, and the A/C system uses evaporator and cabin temp sensors to keep the cabin comfy without icing up the core.

Service‑wise, most temperature sensors are “fit‑and‑forget” until a fault pops up, but a little care goes a long way:

• Scan for DTCs if the C‑HR shows hard starts, rough running, poor economy, the radiator fans running constantly, erratic CVT behaviour, or odd A/C performance.
• Inspect connectors and looms first — corrosion or a loose plug is common and cheap to fix.
• For ECT work, allow the engine to cool, relieve pressure, catch and top up coolant, and bleed the system. Always fit a new sealing washer/O‑ring where specified.
• Use quality parts that match the OE spec, resistance curves must be correct or the ECU will be fed the wrong temps.
• Torque sensors to the Repair Manual spec and avoid using thread sealants unless specified, as they can affect ground paths or readings.
• Keep the intake tract clean so the IAT reads accurately, and ensure the front grille area is free of debris where the ambient sensor lives.

With those basics sorted, the C‑HR’s temperature sensors will quietly keep the engine, hybrid system, and A/C behaving exactly as they should across Aussie and Kiwi conditions.

Popular questions

Where is the engine coolant temperature sensor on a 2016 Toyota C‑HR?
On the 1.2‑litre turbo, the ECT sensor is typically threaded into the coolant outlet/housing near the cylinder head. On the 1.8 Hybrid, it’s likewise positioned in the coolant passage at the engine side. Access is from under the bonnet, exact placement and removal steps are shown in Toyota’s Repair Manual and EWD for the specific engine code.

Allow the engine to cool fully, disconnect the connector, and mind the sealing washer during refit. After replacement, top up and bleed the cooling system and clear any stored DTCs.

What symptoms point to a bad temperature sensor on a C‑HR?
Common giveaways include long cranking when cold, rich running, poor fuel economy, radiator fans stuck on, erratic idle, A/C that won’t regulate properly, or CVT shift feel that’s off. A check engine light with codes like P0117/P0118 (ECT), P0113 (IAT), or P0071 (ambient) often confirms it.

Because wiring faults can mimic a failed sensor, always inspect connectors and harness routing and test resistance against the Repair Manual chart before replacing parts.

Do temperature sensors need regular replacement?
No scheduled interval is specified in Toyota’s servicing data. They’re replaced on condition when a fault is confirmed. That said, proactive checks during routine servicing — scanning for codes, verifying live data, and inspecting plugs and looms — can prevent misdiagnosis and protect the engine and CVT.

Use correct‑spec coolants and keep intake and condenser areas clean so sensors read true and the ECUs can do their job.