Parts for your 2020 Nissan Pathfinder-Throttle position sensors

2020 Nissan Pathfinder throttle-position-sensors

Based on Nissan factory service information for the R52 Pathfinder (MY2020) — specifically the Engine Control (EC) section covering the Electronic Throttle Control system — the vehicle absolutely uses throttle position sensors. The electronic throttle body houses dual Throttle Position Sensors (TP Sensor 1 and TP Sensor 2) alongside a throttle control motor, and the manual details related OBD-II fault codes such as P0121/P0221/P2135 that directly reference those sensors. Nissan’s OEM parts documentation also shows the sensors are integral to the throttle body assembly, not a separate bolt-on piece.

On the 2020 Pathfinder, the TPS pair tells the ECU exactly how far the throttle plate is open. That info, cross-checked against the accelerator pedal position sensor and other inputs, lets the ECU manage airflow, fuel, and ignition to keep the VQ35 running smoothly. With two sensors inside the throttle body, the system has redundancy for safety and reliability — if their readings don’t agree, the ECU can drop into a reduced-power mode to protect the engine and driveline.

Servicing-wise, there’s no separate TPS to swap on this model, if a sensor fails or goes out of range, the fix is usually replacing the complete throttle body assembly. After any throttle body replacement or removal, a throttle relearn is required (closed-throttle position and idle air volume learning). A capable scan tool makes this quick, but Nissan’s published procedures can also be followed carefully without one. Don’t force the throttle plate by hand, and always refit the gasket and torque fasteners to spec to avoid air leaks.

Preventative care is simple: keep the intake clean and the air filter fresh, and consider a gentle throttle body clean if idle hunts or sticks develop. Use a throttle-body-safe cleaner, avoid soaking electronics, and let it dry fully before restart. If drivability issues pop up — surging, poor tip-in, stalling at lights, or a flashing MIL with codes like P0121/P0221/P2135 — check the harness and grounds under the bonnet, then scan live data for TP1/TP2 agreement before ordering parts. A proper diagnosis can save a fair bit of coin and downtime.

• Typical symptoms of TPS/throttle body faults: erratic idle, reduced power mode, delayed acceleration, harsh shifts, or increased fuel use.
• Good practice after battery work or cleaning: perform throttle/idle relearn to stabilise idle and throttle response.

Popular questions about 2020 Nissan Pathfinder throttle-position-sensors

Does the 2020 Pathfinder have a separate TPS I can replace?

No — the throttle position sensors are built into the electronic throttle body. If a sensor fails or readings don’t match, the usual repair is replacing the entire throttle body assembly, then carrying out the throttle and idle relearn procedures with a scan tool or the published manual method.

What are the common signs the TPS/throttle body needs attention?

Drivers often notice a hunting idle, sluggish or spiky throttle response, cruise control dropping out, or the vehicle going into limp mode. The Check Engine Light may log codes like P0121, P0221, or P2135. It’s smart to inspect the wiring, clean the throttle body correctly, and confirm TP1/TP2 data before committing to replacement.

Do I need a relearn after cleaning or replacing the throttle body?

Yes. The ECU needs to relearn the closed position and idle air volume so it can meter airflow accurately. A capable scan tool speeds this up, but the factory procedure can also be followed step-by-step. Skipping the relearn can leave the idle high or unstable and make the car feel flat off the line.