Parts for your 2015 Honda Odyssey-Throttle position sensors

2015 Honda Odyssey throttle position sensor: what it does and how to service it

On the 2015 Honda Odyssey, a throttle position sensor (TPS) is absolutely used and is relevant to how the engine runs. Technical references such as the Honda Service Manual (2011–2017 Odyssey, Fuel & Emissions – Electronic Throttle Control System) specify dual throttle position sensors built into the electronic throttle body, often labelled TP Sensor A and TP Sensor B. The same factory documentation lists diagnostic trouble codes like P0121–P0123, P0221–P0223 and P2135 that directly monitor those sensors. Honda’s genuine parts catalogue for the 2015 Odyssey also shows the electronic throttle body assembly with the TP sensors integrated, not sold separately.

What’s it there for? In a drive-by-wire setup like the Odyssey’s, the TPS tracks the actual angle of the throttle plate while the accelerator pedal position sensors tell the ECU what the driver wants. The ECU compares both, then commands the throttle motor to open or close precisely for smooth power, stable idle, good fuel economy and emissions control. Having two TPS channels provides redundancy and safety.

For servicing, the TPS on this model is built into the throttle body. If a TPS fails or goes out of calibration, the typical fix is to replace the throttle body assembly, then perform an idle learn procedure. There’s no separate periodic replacement interval, instead, treat it as “inspect and as-needed”. Keeping the throttle body clean helps prevent sticky movement and odd throttle behaviour.

• Symptoms of TPS/throttle body issues can include: erratic idle, surging, flat spots, reduced power/limp mode, poor fuel economy, and the MIL on with codes P0121–P0123, P0221–P0223, P2135.
• Replacement tips: use a new throttle body gasket, don’t force the throttle plate by hand, disconnect the battery before unplugging, torque fasteners correctly, clear codes and perform an idle learn.
• Idle learn (general): warm the engine fully, turn all loads off (A/C, lights), then let it idle for ~5 minutes without touching the pedal. Some workshops use a scan tool routine to command the relearn.
• Cleaning advice: use throttle body cleaner sparingly on the bore and plate, avoid soaking the motor/sensor area, and keep the plate from snapping shut.

A workshop scan will quickly confirm TP sensor health by checking live data agreement between Sensor A and B. If they don’t correlate, or codes return after cleaning, a new throttle body is the right call for a reliable fix.

Popular questions

Does the 2015 Odyssey have a separate TPS I can replace?

No. On this model the TPS is integrated into the electronic throttle body. Honda supplies the throttle body as an assembly, so if the TPS is faulty the usual repair is to replace the complete unit. The accelerator pedal has its own sensors, but they’re separate from the throttle body.

How do I reset or relearn the throttle after replacement or battery disconnect?

Warm the engine to operating temperature, switch off all loads (A/C, lights, demister), then let the engine idle undisturbed for about five minutes. This allows the ECU to relearn idle control. Many workshops also use a scan tool to run the electronic throttle and idle learn procedures for a cleaner result.

What fault codes point to a TPS issue on a 2015 Odyssey?

Common codes include P0121–P0123 (TP Sensor A range/performance/low/high), P0221–P0223 (TP Sensor B range/performance/low/high) and P2135 (TP Sensor A/B correlation). If these return after cleaning and checks, the throttle body assembly is likely due for replacement.