Parts for your 2015 Nissan Serena-Throttle position sensors

2015 Nissan Serena throttle position sensor (TPS): what it does and how to look after it

Yes, the 2015 Nissan Serena is fitted with a throttle position sensor. Nissan’s C26-series Serena (2010–2016) runs electronic throttle control on its MR20 petrol powertrain, and the throttle body includes dual built-in throttle position sensors. This is identified in the Nissan Serena C26 Service Manual (EC – Engine Control), within the Throttle Control System descriptions and DTC listings for TPS circuits (e.g. P0120–P0123) and correlation faults (P2135). The same manual outlines CONSULT-III Plus procedures for Throttle Valve Closed Position Learning and Idle Air Volume Learning after service work, which also confirms TPS integration in the throttle control actuator.

On this Serena, the TPS constantly reports the throttle plate angle to the engine control module. That data is key for smooth idle, crisp throttle response, cruise control logic, emissions control, and the CVT’s shift behaviour. With drive-by-wire, the ECM compares the accelerator pedal position (APP) to the TPS so it can command the throttle motor precisely and safely, using redundant sensor tracks for reliability.

As a servicing item, the TPS isn’t a periodic replacement—there’s no routine interval. It’s part of the throttle body assembly, so if the TPS fails or drifts out of spec, the usual fix is to replace the throttle body as a unit. After any throttle body replacement, cleaning, or major battery work, a throttle/idle learn is recommended using CONSULT-III Plus or an approved scan tool to restore stable idle and tip-in.

Good workshop habits go a long way on the Serena. Keep the air filter fresh, and if the throttle bore needs a tidy-up, use a throttle-body-safe cleaner sparingly with the ignition off. Don’t force the throttle plate by hand, and don’t flood the motor housing. Check the harness and connector for corrosion or loose pins under the bonnet, because voltage drop can mimic a failing sensor. When refitting, use a new gasket, tighten bolts evenly to spec, and confirm no vacuum leaks on first start.

• Typical TPS trouble signs: erratic idle, stalling, flat spots, surging, poor fuel economy, cruise dropping out, MIL on with codes like P0120–P0123 or P2135, and sometimes limp mode.
• If faults appear, rule out APP sensor and wiring first, then test/replace the throttle body and carry out throttle/idle relearn.

Popular questions

Does the 2015 Nissan Serena actually have a throttle position sensor?

It does. The C26 Serena’s electronic throttle body houses dual TPS tracks. Nissan’s C26 Service Manual (EC – Throttle Control System and DTC listings) documents the TPS circuits and related learn procedures, confirming its use on this model year.

Can the TPS be replaced on its own, or is it part of the throttle body?

On the Serena it’s integrated into the throttle body assembly and isn’t typically serviced separately. Workshops usually replace the whole throttle body, then perform the Throttle Closed Position and Idle Air Volume Learning to get the idle rock-solid again.

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

Yes, a relearn is strongly recommended. Nissan’s procedures call for throttle closed position learning and idle air volume learning (via CONSULT-III Plus or an equivalent capable scan tool) after cleaning, replacement, or certain battery events to avoid high/unstable idle or sluggish response.