Parts for your 2011 Nissan Dualis-Temperature sensors

2011 Nissan Dualis temperature sensors: what they do and how to look after them

Temperature sensors are absolutely fitted to the 2011 Nissan Dualis (J10). The Nissan J10 Series Service Manual details several of them: the engine coolant temperature (ECT) sensor used by the ECM for fuelling and fan control (EC/CO sections), intake air temperature sensing within the MAF (EC), a CVT fluid temperature sensor inside the JF011E transaxle (TM-CVT), and climate sensors such as the ambient and evaporator temperature sensors for the HVAC system (HAC). The combination meter also uses these signals for the temperature gauge and outside temperature display (MWI). So yes—this model relies on multiple temperature sensors across engine, transmission and climate systems.

On the Dualis, the ECT sensor is the big one for drivability. It helps the ECM trim fuel and ignition when the engine’s cold, sets idle speed, and kicks the radiator fans on at the right time. The IAT (built into the MAF) helps the ECM calculate air density for accurate mixture, while the CVT fluid temp sensor protects the transmission from overheating and controls line pressure. The HVAC ambient and evaporator sensors keep cabin temps comfy and prevent the A/C from icing up.

There’s no scheduled replacement interval for these sensors, they’re serviced as needed. Good practice during routine servicing includes:

• Scan live data on a cold start: ECT and IAT should read close to ambient, then ECT should smoothly rise as the engine warms.
• Inspect connectors and looms near heat sources for corrosion or brittle insulation.
• Maintain coolant quality and level per Nissan specs, poor coolant can skew ECT readings or corrode the sensor seat.
• For CVT models, keep the cooling system healthy and use the correct NS-2 fluid, overheat events will trip warnings and store codes.

Common symptoms of a dodgy temp sensor include hard cold starts, rich running, high idle, fans stuck on, erratic temp gauge, A/C cutting out, or a CVT overheat message. Typical fault codes include P0115–P0119 (ECT), P0110–P0113 (IAT), and P0711/P0713 (CVT temp).

If the ECT needs replacing, let the engine cool, unplug the connector, and swap the sensor at the thermostat housing/water outlet, then refill and bleed the cooling system. Always torque to spec and follow the J10 manual procedures. The CVT temp sensor is internal to the valve body—replacement is a transmission service job rather than a driveway fix.

Where is the ECT sensor on a 2011 Dualis?

On the 2.0L MR20DE petrol, it’s threaded into the water outlet/thermostat housing on the cylinder head side, with a two-pin connector. On the 2.0 dCi, it sits at the coolant outlet near the head. Access is straightforward once intake ducting is moved aside.

Does the Dualis CVT have a fluid temperature sensor?

Yes. The JF011E CVT has an internal fluid temperature sensor used by the TCM for pressure control and overheat protection. It’s not a routine service item, if it fails or sets codes, diagnosis involves pan/valve body work. Keep NS-2 fluid and the cooling system in good nick to avoid heat stress.

Do temperature sensors need regular replacement?

No set interval. Replace only if testing shows they’re out of spec or fault codes/logs point to a sensor issue. Regular scans, sound wiring, correct coolant and CVT fluid go a long way to keeping them accurate.