Parts for your 2019 Honda Accord-Throttle position sensors

2019 Honda Accord throttle-position-sensors: what they do and how to look after them

On the 2019 Honda Accord, throttle-position-sensors are absolutely used and relevant. Honda’s factory Service Information for the 2018–2020 Accord range documents an electronic throttle body with dual Throttle Position (TP) Sensor circuits, labelled TP Sensor A and TP Sensor B, as part of the Electronic Throttle Control system. The Honda Electronic Parts Catalogue also shows the TPS integrated into the throttle body assembly rather than as a separate bolt-on sensor, and common OBD-II diagnostics for this model include TP-related fault codes (for example P0121–P0123). Put simply: the 2019 Accord relies on TPS data to manage drive-by-wire throttle operation.

On this Accord, the TPS tells the engine computer exactly where the throttle plate is at any moment so it can meter fuel, spark and boost (on the 1.5T and 2.0T) smoothly. It works hand-in-hand with the accelerator pedal position (APP) sensor to deliver crisp throttle response, stable idle and proper transmission shift behaviour. Because it’s a dual-channel sensor inside the throttle body, the ECU can cross-check both signals for safety and precision.

Replacement-wise, the TPS isn’t a separate service item, it’s integral to the throttle body. If testing confirms a faulty TPS circuit, the remedy is to replace the throttle body assembly, fit a new gasket, reconnect the coolant hoses (if equipped), and perform the throttle/idle learn procedure. Honda’s service info specifies an idle or throttle position relearn after battery disconnect, throttle body cleaning or replacement, otherwise customers may notice high idle, hunting or sluggish take-off.

Routine maintenance is straightforward. The TPS itself doesn’t have a scheduled replacement, but the throttle body and plate do appreciate a clean every 60,000–100,000 km, especially if there’s a sticky pedal, unstable idle or a light coating of carbon around the plate. Use a throttle-body-safe cleaner and a lint-free cloth, don’t force the plate by hand on a drive-by-wire unit. Keep battery voltage stable during any relearn. If the MIL is on, scan for codes before throwing parts—intermittent wiring, poor grounds or connector corrosion can mimic a bad sensor.

• Typical symptoms of TPS/throttle body issues: hesitant acceleration, uneven idle, poor fuel economy, cruise control dropping out, or TP-related DTCs.
• After any work on the throttle body: carry out the idle/throttle learn as per the service manual or with a suitable scan tool.

By sticking to good cleaning habits, proper diagnostics and the correct relearn steps, a 2019 Accord will keep its throttle response feeling fresh and fuss-free for years.

Popular questions about 2019 Honda Accord throttle-position-sensors

Does the 2019 Accord have a separate TPS I can replace?
No—on this model the TPS is integrated into the electronic throttle body. If the TPS is faulty, the fix is to replace the throttle body assembly. That design improves reliability and signal accuracy but means the sensor isn’t a standalone part.

What are the common signs of a TPS issue on a 2019 Accord?
Drivers may notice hesitant throttle, unstable idle, sudden loss of cruise control, or the check engine light with codes like P0121–P0123. Before replacing anything, it’s wise to inspect the connector, wiring and perform live-data checks to confirm a true sensor fault.

Is a relearn needed after cleaning or replacing the throttle body?
Yes. After battery disconnect, throttle body cleaning or throttle body replacement, perform the throttle/idle learn. Skipping this can leave the idle too high or hunting. A scan tool streamlines the process, but a manual procedure from the service manual also works.