Parts for your 2004 Nissan Primera-Throttle position sensors

2004 Nissan Primera throttle position sensor (TPS)

Technical sources confirm the 2004 Nissan Primera (P12) does use a throttle position sensor. The Nissan Primera P12 Factory Service Manual (Engine Control, 2004), Autodata, and common Nissan training material describe an electronic throttle control system on the QG18DE 1.8, QR20DE 2.0, and YD22 diesel engines. In this setup the throttle body houses an electronic throttle control actuator and an integrated dual-track throttle position sensor, working alongside the accelerator pedal position sensor. So yes—TPS is fitted and relevant on this model.

On the 2004 Primera, the TPS tells the engine computer exactly how far the throttle plate is open. That live position feedback is crucial for smooth acceleration, stable idle, fuel economy, and emissions. Because this generation is drive-by-wire, the TPS is part of a safety-redundant system (two internal sensor tracks) that constantly cross-checks for accuracy.

As part of regular servicing, it’s smart to give the throttle body a look every 40–60,000 kilometres, especially if idle feels a bit rough or there’s a slight hesitation pulling away. The TPS itself isn’t a routine replacement item, but the throttle body can get carbon build-up that makes the plate sticky. Use a throttle-body-safe cleaner and avoid soaking the sensor or moving the factory stop screw. After cleaning—or after a battery disconnect—perform a throttle closed-position and idle air volume learn. A capable scan tool does this quickly, there’s also a pedal procedure that works on many P12s. Autodata and the Nissan FSM detail both methods.

• Common TPS-related symptoms: erratic idle, flat spots, poor fuel economy, cruise control dropping out, harsh or hunting shifts (auto), and a check engine light with DTCs like P0120–P0123 or P2135.
• Checks under the bonnet: inspect the TPS/throttle body connector for corrosion, make sure the harness isn’t rubbed through near the intake, and confirm battery/charging voltage is healthy.

If the TPS has failed, note that on the Primera P12 it’s typically integral to the throttle body and not designed to be adjusted or replaced separately. The practical fix is a complete throttle body assembly from a reputable OE supplier. Fit a new gasket, tighten the bolts evenly to specification, and carry out the relearn procedures so idle and tip-in feel are spot on. With good parts and a proper calibration, the car should drive crisply and reliably.

Popular questions

Does the 2004 Nissan Primera have a separate TPS or is it part of the throttle body?
On most P12s it’s integrated into the electronic throttle body as a dual-track sensor. That means if the sensor fails, the usual remedy is replacing the whole throttle body rather than a standalone TPS.

Do I need to recalibrate anything after cleaning or replacing the throttle body?
Yes. Perform the throttle valve closed-position learn and idle air volume learn. A scan tool makes it straightforward, though many owners successfully use the pedal procedure outlined in Nissan service literature.

What fault codes point to a TPS issue on a 2004 Primera?
Look for P0120, P0121, P0122, P0123, and P2135. These indicate range/performance or correlation faults related to the throttle position sensors.