Parts for your 2017 Nissan Serena-Throttle position sensors

2017 Nissan Serena throttle-position-sensor: what it does and how to look after it

Yes, the 2017 Nissan Serena uses a throttle position sensor (TPS). Technical references that support this include the Nissan Serena C27 factory service manual (Engine Control – MR20DD/S-HYBRID), which details an electronic throttle control system where the TPS is integrated into the throttle control motor on the throttle body, and the Nissan parts catalogue/EPC that lists the throttle body as an assembly with no standalone TPS. Industry data sources used by workshops (e.g., Autodata/Autoinfo) also show service procedures and diagnostics for an integrated throttle body and pedal sensor rather than a separate, replaceable TPS.

On the 2017 Serena, the TPS is the throttle body’s built-in “eyes,” constantly reporting actual throttle valve angle back to the engine control module. Paired with the accelerator pedal position sensor, it lets the ECU blend driver input with engine and transmission logic for smooth take-off, crisp response and stable idle. Because it’s part of the electronic throttle (drive-by-wire), it’s critical for fuel metering, emissions, cruise control and stability strategies.

When it’s healthy, you’ll barely think about it. When it’s not, the Serena can feel doughy off the line, hang revs, idle rough, or light the MIL. Common fault codes include P0121–P0123 and P2135 when the pedal and throttle signals don’t agree. The TPS isn’t usually serviced on its own, on this model it’s integrated, so faults are typically handled by cleaning the throttle body, carrying out a throttle/idle relearn, or replacing the throttle body assembly if the sensor tracks have failed.

As part of regular servicing, a workshop will often:

• Inspect live data for smooth, linear throttle angle changes and no dropouts.
• Clean light carbon from the throttle plate and bore (sensor itself isn’t touched).
• Run throttle valve closed-position and idle air volume learn with a scan tool after cleaning, battery disconnects or replacement.

If replacement is needed, it’s typically the complete throttle body with a new gasket. It’s worth using quality parts and ensuring the relearn is done, skipping that step can leave the idle high or hunting. Keep the air filter fresh, avoid spraying harsh cleaners directly onto the electronics, and don’t force the throttle plate by hand. With those basics covered, the Serena’s throttle control stays smooth, predictable and efficient for the long haul.

Popular questions about 2017 Nissan Serena throttle-position-sensors

Does the 2017 Serena have a separate TPS I can replace?

No. On the C27 Serena the throttle position sensor is integrated into the electronic throttle body. If the TPS track is faulty, the repair is normally a complete throttle body replacement, followed by the required throttle/idle relearn procedure.

What are the signs the TPS/throttle body is playing up?

Drivers might notice hesitant acceleration, unstable idle, poor fuel economy, cruise control dropping out, or the check engine light on. Scan results may show codes like P0121–P0123 or P2135, and live data will show erratic throttle angle compared with pedal input.

Is a relearn needed after cleaning or replacing the throttle body?

Yes. After cleaning, battery disconnection or replacement, a throttle valve closed-position and idle air volume learn is recommended using a scan tool. This resets the ECU’s expectations so idle and response are spot on.