Parts for your 2017 Honda Odyssey-Throttle position sensors

2017 Honda Odyssey throttle position sensor (TPS): what it does and how to look after it

Yes, the 2017 Honda Odyssey absolutely uses a throttle position sensor. Technical references including the Honda Service Manual for the 2011–2017 Odyssey (Electronic Throttle Control System section) and Honda parts catalogues show an electronic throttle body that houses twin throttle position sensors (often labelled TP Sensor A and B) along with the throttle actuator motor. On this model the TPS is integrated into the throttle body and isn’t serviced separately—if the sensor fails, the whole throttle body assembly is replaced. OBD-II references (SAE J1979) also list TPS-related fault codes (like P0121–P0123 and P2135) that apply to this Odyssey.

The role of the TPS on the 2017 Odyssey is to tell the engine control unit exactly how far the throttle plate is open. Because it’s a drive-by-wire setup, there’s no old-school cable, the ECU reads the accelerator pedal sensors, then drives the throttle motor, and the TPS reports the actual plate angle so everything stays smooth and safe. Honda uses dual TPS signals for redundancy and accuracy, which helps with stable idle, crisp response, proper transmission shift timing, and keeping emissions in check.

As part of regular servicing, it’s worth giving the throttle body some attention every 40,000–60,000 kilometres, especially if the car idles a bit rough or feels doughy off the mark. A careful clean of the throttle bore and plate (engine off, no forcing the blade by hand) can clear up carbon build-up that the ECU has been trying to work around. Keep the electrical connector clean and snug, and check the wiring loom under the bonnet for rub-throughs or moisture.

If fault codes pop up—think P0121/P0122/P0123 or P2135—or if it goes into limp mode, stalls, or flares the revs, grab a scan tool and look at the live data for TP Sensor A/B agreement. If the readings don’t track or go out of range, the fix on this Odyssey is generally a new throttle body assembly with a fresh gasket. After replacement or a thorough clean, perform the throttle/idle learn: warm the engine, switch all accessories off, and let it idle undisturbed per the Honda procedure (or use a capable scan tool). That reset lets the ECU relearn the clean plate position so it behaves properly. Use quality parts, torque everything to spec from the workshop manual, and it’ll be happy motoring.

• Common signs: erratic idle, hesitation, poor economy, MIL on, limp mode.
• Do not pry or force the throttle plate—damage can occur.
• TPS is integral to the throttle body on this model—no separate sensor swap.

Does the 2017 Odyssey have a separate, replaceable TPS?

No. On this model the TPS is built into the electronic throttle body with the actuator motor. If the TPS is faulty, the usual repair is replacing the complete throttle body assembly and then carrying out a throttle/idle learn.

What symptoms point to a failing TPS on a 2017 Odyssey?

Drivers may notice a rough or high idle, hesitation, stalling, poor fuel economy, the check engine light, or limp-home behaviour. Scan for codes like P0121–P0123 or P2135 and check that TP Sensor A and B track together in live data.

Is relearning needed after cleaning or replacing the throttle body?

Yes. After cleaning or replacing the throttle body, perform the Honda throttle/idle learn so the ECU can relearn the throttle plate position. Many scan tools can run the procedure, otherwise, follow the workshop manual steps (warm engine, all loads off, undisturbed idle for the specified time).