Parts for your 2012 Nissan Pathfinder-Throttle position sensors

2012 Nissan Pathfinder throttle position sensor — does it have one?

Yes, the 2012 Nissan Pathfinder (R51, VQ40DE petrol and YD25DDTi diesel) uses a throttle position sensor. Per the Nissan Factory Service Manual for the R51 (EC/Engine Control – Electronic Controlled Throttle System), the TPS is built into the electronic throttle control actuator on the throttle body and is not serviced separately. The accelerator pedal has its own dual-track accelerator pedal position (APP) sensor. Nissan’s DTC coverage in the same manual lists TPS- and correlation-related codes (e.g., P0121–P0123, P2135), and Nissan parts catalogues for the 2012 Pathfinder show the throttle body assembly supplied as a unit with the TPS integrated. So, a throttle position sensor is absolutely relevant and fitted on this model.

The throttle position sensor on a 2012 Pathfinder tells the engine computer exactly how far the throttle plate is open. That info lets the ECM sort fuel delivery, ignition timing, idle speed control, cruise control and even auto trans shift behaviour, so the ute feels smooth and responsive. Because it’s an electronic throttle, the TPS lives inside the throttle body alongside the throttle motor, while the pedal has its own APP sensor to report driver demand.

There’s no scheduled replacement for the TPS itself, it’s designed to last the life of the throttle body. Typical service advice is to keep the throttle bore clean and ensure the wiring and connectors are tidy. Every 60,000–80,000 km, a careful clean of the throttle plate and bore with a suitable intake cleaner can help prevent sticky throttle symptoms. Don’t force the blade by hand, and avoid spraying cleaner into sensors. If the housing gasket is disturbed, replace it.

If faults crop up — think erratic idle, throttle lag, poor fuel economy, limp-home, or a MIL with codes like P0121–P0123 or P2135 — inspect the harness and grounds, check for intake leaks, and consider the accelerator pedal sensor too. On this Pathfinder, the TPS isn’t serviceable by itself, replacing the throttle body assembly is the fix when the sensor fails. After cleaning or replacement, perform the required relearns: Throttle Valve Closed Position, Accelerator Pedal Released Position, and Idle Air Volume Learn. A capable scan tool (Consult III or equivalent) makes this painless, a manual “pedal” procedure exists but can be finicky with timing. Use OE-quality parts, torque the throttle body evenly, and verify updates or TSBs if drivability concerns persist.

• Common signs: unstable idle, hesitation, high fuel use, and throttle correlation codes.
• Best practice: clean sensibly, protect connectors, and complete ECM relearns after any work.

Does the 2012 Pathfinder have a throttle position sensor or just a pedal sensor?

It has both. The accelerator pedal uses a dual-track APP sensor to report driver input, and the throttle body contains the TPS to report actual throttle plate angle. The ECM constantly compares the two for safety and smooth control.

Can the TPS be replaced separately on a 2012 Pathfinder?

No. On this model the TPS is integrated into the electronic throttle control actuator (throttle body). If the sensor is faulty, the complete throttle body assembly is replaced and the ECM relearns are performed afterwards.

Can the throttle relearn be done without a scan tool?

There is a manual procedure, but it’s timing-sensitive and easy to miss. A proper scan tool simplifies Throttle Valve Closed Position, Accelerator Pedal Released Position, and Idle Air Volume Learn, and helps confirm the job’s done right.