Parts for your 2020 Toyota C-hr-Temperature sensors

2020 Toyota C‑HR temperature sensors — what they do and how to look after them

Yes, temperature sensors are absolutely used on the 2020 Toyota C‑HR. Toyota’s factory service information and wiring diagrams for the 2.0‑litre petrol and hybrid variants show multiple temperature inputs used by the engine, transmission and HVAC systems. This aligns with OBD‑II standards (SAE J1979), which require data items like engine coolant temperature and intake air temperature to be available for diagnostics, and with Toyota parts catalogues listing components such as the Engine Coolant Temperature (ECT) sensor and ambient air temperature sensor for the C‑HR.

On this model, temperature sensors help the vehicle run smoothly, keep emissions in check, and keep occupants comfy. The ECT sensor tells the ECU how warm the engine is so it can set cold‑start fuelling, ignition timing and cooling fan operation. An Intake Air Temperature (IAT) sensor aids air‑fuel calculations. The climate control uses an ambient temperature sensor at the front of the car and interior/cabin sensors to manage A/C performance and the outside temp display. The Direct Shift‑CVT monitors fluid temperature to protect the transmission and tune shift behaviour. Hybrid variants also monitor HV battery temperature to maintain battery health.

• Common signs of a dodgy temp sensor: hard cold starts, high idle, rich running, the radiator fan stuck on, erratic temp gauge, A/C not cooling properly, or fault codes like P0117/P0118 (ECT) or P0113 (IAT).
• Typical locations: ECT threads into the engine coolant passage