Parts for your 2019 Haval H6-Temperature sensors

2019 Haval H6 temperature sensors — what they do and how to look after them

Temperature sensors are absolutely fitted and relevant on the 2019 Haval H6. Technical sources including the Haval/Haval H6 Workshop Manual (Engine Control System and Cooling System sections, 2018–2019 editions), common service data providers used in AU/NZ workshops, and OEM engine management documentation for the GW4C20B/GW4G15B turbo petrol engines confirm the vehicle uses multiple temperature inputs: engine coolant temperature (ECT), intake air temperature (IAT), ambient air temperature for HVAC, and, on DCT models, transmission fluid temperature. These sensors feed the ECM/TCU/BCM to manage fuelling, ignition, boost, fan operation, gauge display, air‑con performance, and drivability.

On this H6, temperature sensors do a heap of behind-the-scenes work. The ECT sensor helps the engine computer decide how much fuel to inject on cold starts, when to switch on the radiator fans, and when to protect the engine if things get too hot. The IAT sensor fine‑tunes spark and boost to keep the turbo engine happy in Aussie or Kiwi heat. The ambient sensor stops the air‑con from doing silly things and keeps the cabin temp steady, while the transmission temp input helps the control unit pick smooth, safe shift strategies.

They don’t have a set replacement interval, but they should be checked whenever there are symptoms or as part of routine servicing. Good shops in AU/NZ will:

• Scan for OBD-II faults (e.g., P0115–P0119 for ECT, P0110–P0114 for IAT) and look at live data cold vs warm.
• Inspect connectors and looms for corrosion or chafing, especially near the thermostat housing and intake ducting.
• Verify coolant quality and correct mixture, poor coolant can foul or skew ECT readings.
• Compare sensor resistance against temperature with a service chart if readings look off.

Typical signs a temperature sensor’s on the way out include hard cold starts, rich running, high fuel use, the radiator fans roaring all the time, an erratic temp gauge, weak air‑con performance, or harsh/odd shifts on DCT models. If replacement’s needed, use OE or reputable aftermarket parts, refresh sealing washers as required, and torque to the manufacturer spec. Always work stone cold when opening the cooling system, bleed air properly, and clear any stored codes after the job. As a light maintenance habit, have these sensors and their plugs looked over every 20,000–30,000 km during scheduled services, and keep to the recommended coolant change interval to give the sensors an easy life.

FAQs

Where is the engine coolant temperature sensor on a 2019 Haval H6?
It’s typically threaded into the thermostat housing or cylinder head near the upper radiator hose outlet. On the 1.5T and 2.0T engines, access is usually under the engine cover on the gearbox side of the head. Exact placement can vary slightly by engine code and build year.

Do temperature sensors need routine replacement?
No. They’re replaced on condition. If scan data, resistance checks, or symptoms point to a fault, swap it out. Otherwise, keep connectors clean, maintain the cooling system, and monitor for codes. No special programming is usually required—just clear faults and verify live data.

Can a faulty temperature sensor cause poor fuel economy or odd shifting?
Yes. A bad ECT or IAT can force rich mixtures, affect ignition timing, and keep fans running, all of which burn more fuel. On DCT models, incorrect temperature input can alter shift timing and feel. Fixing the sensor often restores normal economy and drivability.