Parts for your 2019 Honda Odyssey-Throttle position sensors

2019 Honda Odyssey Throttle Position Sensor: What It Does and How to Look After It

Yes, the 2019 Honda Odyssey does use a throttle position sensor (TPS). Technical sources including the Honda 2018–2020 Odyssey Service Manual (Fuel & Emissions: Electronic Throttle Control System), Honda DTC listings for this model (e.g., P0121–P0123 Throttle Position Sensor “A” Range/Performance, Low, High, P2135 Throttle/Pedal Position Sensor A/B Correlation), and Honda parts catalogues confirm the TPS is integrated into the electronic throttle body assembly on the J35Y6 engine. On this model, the sensor isn’t serviced separately, if it fails, the throttle body is replaced as a unit.

On the 2019 Odyssey, the throttle position sensor is a crucial part of the drive-by-wire setup. It tracks how far the throttle plate opens and feeds that position back to the powertrain control module (PCM). The PCM then balances fuel, spark, and airflow to keep things smooth and responsive. Paired with the accelerator pedal position sensors at the pedal, it lets the van deliver clean take-offs, predictable overtakes, and stable idle even with the A/C cycling or on hilly Kiwi and Aussie roads.

When the TPS starts going out of whack, drivers might notice a spiky or lazy throttle, hunting idle, stalling at lights, a reluctant kickdown, or the check engine light. Common fault codes include P0121, P0122, P0123, and P2135. Because Honda builds the TPS into the throttle body on this model, the fix is usually a new throttle body assembly rather than a standalone sensor swap.

Good servicing habits help. Keep the throttle body clean at routine intervals (around every 60,000–100,000 km, or if there’s a sticky pedal feel). Use a throttle-body-safe cleaner, avoid soaking the electronics, and don’t force the throttle plate open under the bonnet with the ignition on. If the throttle body is removed, replace the gasket and tighten fasteners to the workshop spec.

After cleaning or replacing the throttle body, the PCM needs an idle learn so it can recalibrate airflow at closed throttle. A workshop will typically use Honda’s diagnostic tool to run the throttle/idle learn. A manual method also works on many Hondas: bring the engine to full operating temperature with no loads (headlights, A/C, fans off), then allow it to idle undisturbed for several minutes. If any DTCs are stored, clear them first, then run the learn again. This simple step can save a lot of rough-idle grief.

Authoritative references: Honda 2018–2020 Odyssey Service Manual (Electronic Throttle Control, DTC P0121–P0123, P2135), Honda ServiceNews guidance on idle learn after throttle service, and Honda parts catalogues noting the TPS is integral to the throttle body on the 2019 Odyssey.

• Signs it needs attention: erratic throttle, poor fuel economy, surging, limp mode, and TPS-related fault codes.
• Best practice: clean sensibly, don’t force the plate, replace the throttle body if the TPS is faulty, and complete the idle learn procedure.

Popular questions

Does the 2019 Odyssey have a replaceable throttle position sensor?
It has a throttle position sensor, but it’s built into the throttle body. On this model, Honda doesn’t service the TPS as a separate part, so a confirmed TPS fault typically means replacing the complete throttle body assembly and carrying out an idle learn.

What symptoms point to a failing TPS on a 2019 Odyssey?
Drivers may notice hesitation, flat spots on acceleration, unstable idle, sudden surging, poor shifting behaviour, or the check engine light. Scan tools often show codes like P0121, P0122, P0123, or P2135. If cleaning the throttle body and running an idle learn doesn’t settle it, testing will usually confirm the throttle body needs replacement.

Is there any maintenance that prolongs TPS life on this vehicle?
Regular throttle body cleaning with the right solvent, good air filtration, and avoiding moisture intrusion around the throttle connector all help. After any work affecting airflow at closed throttle, perform the idle learn so the PCM knows the new baseline—this prevents rough idle and tip-in stumble.