Parts for your 2017 Haval H6-Temperature sensors

2017 Haval H6 temperature-sensors: what they do and how to look after them

Based on factory GWM/Haval workshop information for the 2017 H6, standard OBD‑II/SAE J1979 diagnostic definitions (which include temperature-sensor fault codes like P0110–P0114 and P0115–P0119), and H6 parts catalogues, temperature sensors are absolutely fitted and relied upon in this model. They’re central to engine management, cooling fan control, air‑conditioning performance and, depending on variant, transmission and emissions management. So yes—temperature sensors are both relevant and used on the 2017 Haval H6.

On this H6, the engine coolant temperature (ECT) sensor tells the ECU how warm the engine is so it can sort cold starts, set fuelling and ignition, and switch the radiator fans at the right time. The intake air temperature (IAT) sensor helps the ECU adjust fuel and boost for Aussie/Kiwi climate swings. There’s also an ambient air temp sensor up front for A/C and the dash display, and many variants include transmission fluid and A/C evaporator temperature sensors to protect hardware and keep comfort on point.

These sensors aren’t “service items” with a fixed replacement interval. Instead, they’re inspected or replaced when symptoms or fault codes pop up. Good servicing habits help them last: keep the correct coolant fresh (as per the Haval schedule), repair any coolant leaks quickly, and make sure wiring looms and connectors aren’t chafed, corroded or full of grit. A quick scan-tool health check during routine services is a smart move—especially if the fans seem to run longer than usual or the gauge reads odd.

When an ECT or IAT does fail, the ECU usually logs a code (again, those SAE J1979 P011x families). Common giveaways include rough cold starts, rich running, high idle, poor fuel economy, a temp gauge that’s not believable, A/C playing up, or cooling fans stuck on.

Replacement tips: always work on a cold engine, depressurise the cooling system, capture and reuse/replace coolant as required, and fit an OEM‑quality sensor. Don’t over-tighten—follow the workshop manual torque guidance and use the correct sealing washer or pre‑applied sealant if specified. After fitting an ECT, bleed the cooling system properly, clear fault codes and confirm live data with a scan tool. For the ambient sensor behind the front bumper, check mounting clips and airflow—stone strikes can knock readings out.

• Symptoms to watch: hard cold starts, fans running all the time, sudden gauge swings, A/C not cooling right, increased fuel use.

Where is the engine coolant temperature sensor on a 2017 Haval H6?

It’s typically mounted in or near the thermostat housing or on the cylinder head coolant outlet, under the bonnet at the front/side of the engine. Exact position varies by engine and market spec. If visibility is tight, trace the upper radiator hose back to the housing and look for a two‑pin sensor.

Can a dodgy temp sensor cause high fuel use or the fans to run constantly?

Yes. If the ECT reports the engine is colder than it is, the ECU enriches the mixture and may keep the thermo fans on longer. Likewise, a failed or unplugged sensor can trigger a failsafe strategy, lighting the MIL and running fans to protect the engine.

Do I need to bleed the cooling system after changing the ECT sensor?

Absolutely. Any time the cooling system is opened, bleed it per the workshop procedure: heater on hot, top up to spec, run to operating temp, squeeze hoses carefully to purge air, and recheck the level once cool. Air pockets can cause hot spots, erratic gauge readings and poor heater performance.