Parts for your 2008 Nissan Dualis-Temperature sensors

2008 Nissan Dualis temperature sensors

Temperature sensors are absolutely fitted to the 2008 Nissan Dualis (J10). Technical references that document them include the Nissan Qashqai/Dualis J10 Service Manual (EC – Engine Control System, TM – Transaxle & Transmission [CVT], HAC – Heater & Air Conditioning) and Jatco RE0F10A/JF011E CVT technical information. These sources describe the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensing within the MAF, transmission fluid temperature sensing, and HVAC ambient/evaporator temperature sensors.

On the 2008 Dualis, temperature sensors do a quiet but vital job day in, day out. The ECT sensor tells the engine computer how hot the coolant is so it can sort cold starts, fuel mixture, ignition timing, idle speed, and kick the radiator fans in without drama. The IAT reading helps the ECU correct fueling as air density changes. If it’s a CVT model, the transmission temperature data protects the unit under heavy loads and sets shift strategy. In the cabin, ambient and evaporator sensors keep the climate control behaving and stop the evaporator icing up on frosty mornings.

They’re solid-state thermistors, so there’s no scheduled replacement interval. The smart play is inspection and testing during regular servicing, especially if any odd running or warning lamps appear. A quick scan of live data will usually show if a sensor’s gone walkabout, a multimeter resistance check against the service manual curve can confirm it.

• ECT sensor: Typically mounted near the thermostat/water outlet on the MR20DE.
• IAT sensor: Integrated into the MAF assembly on most MR20DE Dualis variants.
• CVT fluid temperature sensing: Used by the TCM in JF011E/RE0F10A units.
• Ambient/evaporator sensors: In front of the radiator support and inside the HVAC case.

When to suspect a crook temperature sensor or related wiring:

• Hard cold starts, high idle, rich running, average fuel economy, fans stuck on.
• Check Engine Light with codes like P0115–P0119 (ECT), P0111 (IAT), or P0710 (trans temp).
• CVT overheat warnings or limp mode on long hills with a load.

Replacement tips: let the engine cool, disconnect the battery if working near engine harnesses, and don’t spill coolant over connectors. For an ECT swap, drain enough coolant to drop the level below the sensor, replace the sealing washer/O-ring, and refill with the correct Nissan-spec coolant. Bleed the system properly with the heater on to avoid airlocks under the bonnet. After any sensor work, clear codes and verify live data and fan operation. Use quality parts with the correct resistance curve, incorrect specs can have the ECU guessing and waste petrol.

Prevention is simple: keep the cooling system fresh, ensure the radiator and condenser aren’t packed with bugs, and gently clean the MAF (if serviceable) so IAT readings stay honest. A quick connector check every 10,000–15,000 kilometres can save a lot of head-scratching later.

Where is the engine coolant temperature sensor on a 2008 Nissan Dualis?

On MR20DE models it’s typically threaded into the water outlet/thermostat housing on the cylinder head side. It can be reached from above with the air intake gear out of the way, or from underneath on some trims. A workshop manual view helps confirm the exact spot on your variant.

Is the intake air temperature sensor separate or built into the MAF on the Dualis?

For most 2008 Dualis MR20DE models, the IAT is integrated into the MAF sensor housing in the intake ducting. If the IAT reading is off, technicians often test the MAF assembly and its wiring first.

Do temperature sensors need routine replacement?

No. They’re replaced on condition, not by time. If diagnostics show incorrect readings, intermittent signals, or related fault codes, replace the sensor and recheck live data. Otherwise, stick to good cooling-system maintenance and connector inspections during regular services.