Parts for your 2006 Nissan Serena-Throttle position sensors

2006 Nissan Serena throttle-position-sensors

Based on Nissan’s own technical literature, throttle-position-sensors are absolutely used on the 2006 Nissan Serena (C25). The Nissan Serena C25 Service Manual (EC – Engine Control System) details an electronic throttle control setup where dual throttle position sensors are integrated into the throttle control actuator (throttle body), and the accelerator pedal carries a separate pedal position sensor. Nissan MR20DE/QR20DE engine control descriptions and common DTC listings (P0120–P0123) back this up, noting that the ECM reads throttle plate position from the built-in sensors rather than a standalone, cable-driven switch.

On a 2006 Serena, those throttle-position-sensors tell the engine computer exactly how far the throttle plate is open, so fuelling and ignition can be spot-on for smooth take-offs, tidy idle, and decent economy. Because it’s a drive-by-wire setup, the sensors are part of a matched assembly with the throttle motor, most times, the sensor isn’t serviced on its own—if it fails, the whole throttle body is replaced.

When servicing this Serena, a bit of love for the throttle body goes a long way. Lightly clean the bore and plate with sensor-safe throttle cleaner to prevent sticky idle and flat spots, then perform the throttle closed position learning and idle air volume learning (IAVL). Nissan outlines these procedures in the EC section and via CONSULT, there’s also a pedal-based method if a scan tool isn’t handy. Skipping the relearn can leave the idle high, low, or hunting.

Signs the throttle-position-sensors may be playing up include:

• Surging idle, stalling, or sluggish response under the bonnet
• Check engine light with codes like P0120–P0123 or P2135
• Transmission shifts feeling odd due to incorrect load data

Replacement tips for this Serena are straightforward: use a quality throttle body assembly, fit a fresh gasket, and torque the fasteners evenly. Disconnect the battery only if needed, and be ready to carry out the relearn steps afterward. If the throttle body has heavy carbon or the car’s done big kilometres, pairing a clean with a new air filter helps keep it sweet. A periodic throttle body clean—say every 30,000–40,000 km—keeps drivability crisp and reduces the chance of sensor-range faults.

If the vehicle is running fine but feels a tad lazy off the line, a clean plus relearn often restores that smooth, eager feel owners expect from a well-kept 2006 Serena.

Popular questions about 2006 Nissan Serena throttle-position-sensors

Is the TPS on a 2006 Serena separate or built into the throttle body?
On the C25 Serena, the throttle-position-sensors are integrated into the electronic throttle body along with the throttle motor. In practice, that means faults usually require replacing the complete throttle body rather than just a sensor.

Do I need to recalibrate anything after cleaning or replacing the throttle body?
Yes. After cleaning or replacement, perform throttle valve closed position learning and idle air volume learning. Nissan outlines these in the EC section of the service manual and via CONSULT. Without the relearn, idle quality and throttle response can be off.

What are the common symptoms of a failing TPS on this model?
Typical signs include an erratic or high/low idle, hesitation on take-off, poor fuel economy, and a check engine light with codes such as P0120–P0123 or P2135. If cleaning and relearn don’t help, test and consider replacing the throttle body assembly.