Parts for your 2013 Honda Odyssey-Throttle position sensors

2013 Honda Odyssey throttle position sensors: what they do and how to look after them

Based on Honda’s service literature for the 2011–2013 Odyssey (Electronic Throttle Control System section) and factory DTC lists that include P0121–P0123 and P2135 (Throttle Position Sensor A/B range/performance and correlation), the 2013 Honda Odyssey does use throttle position sensors. They’re integrated into the electronic throttle body as dual sensors (often called TP Sensor A and TP Sensor B) and work alongside the accelerator pedal position sensor to tell the PCM exactly how far the throttle plate is opened.

On this model, the throttle position sensors aren’t typically a separate, bolt-on part. Honda integrates them into the throttle body assembly, so diagnosis and replacement often involve the complete throttle body rather than just the sensor. That’s the design shown in OEM parts catalogues and described in Honda service procedures for ETCS.

Purpose-wise, the TPS pair tracks throttle plate angle in real time. The PCM compares the two signals for accuracy, trims fuel and ignition, manages idle speed, and coordinates with the transmission for smooth shifts. If readings don’t agree, the Odyssey can drop into limp mode, light the MIL, and log codes like P2135. Common drivability clues of a TPS issue include erratic idle, flat spots on take-off, sudden loss of power, or hunting at cruise.

Servicing advice for a 2013 Odyssey throttle body/TPS setup:

• Inspection: During scheduled servicing, scan for stored or pending codes, check live data for TP Sensor A/B agreement, and inspect the connector and wiring under the bonnet for corrosion or chafing.
• Cleaning: If the throttle plate has carbon build-up, remove the inlet duct and clean gently with throttle-body-safe cleaner. Don’t force the plate open by hand—use light pressure only.
• Replacement: If the TPS is faulty, replace the throttle body assembly with a quality unit and a new gasket. Disconnect the battery negative, follow torque specs, and reconnect all hoses and clips correctly.
• Relearn: Perform the Honda idle/ETCS learn procedure after battery or throttle body work. Warm the engine to operating temp, switch all loads off, and allow it to idle per the manual so the PCM relearns the throttle position and idle airflow.
• Road test: Clear codes, check freeze-frame data if applicable, and road test across various loads to confirm stable TP readings and smooth shifts.

With regular checks and a tidy throttle body, most owners can expect many kilometres of drama-free operation from the Odyssey’s electronic throttle system.

Popular questions

How can someone tell if the throttle position sensors on a 2013 Odyssey are failing?
They’ll usually see the check engine light and may experience surging, stumbling on acceleration, poor idle, or the transmission holding odd gears. A scan tool often shows DTCs like P0121–P0123 or P2135, and live data will reveal TP Sensor A/B signals that don’t track together.

Can just the TPS be replaced, or does the whole throttle body need changing?
On most 2013 Odysseys, the TPS is part of the throttle body and isn’t serviced separately. If the sensor circuit is at fault (and wiring isn’t the cause), the recommended fix is a complete throttle body assembly replacement, followed by an idle learn.

Is an idle relearn really necessary after throttle body work?
Yes. The PCM needs to relearn the throttle plate position and base idle airflow. Skipping this can cause a high or unstable idle and poor drivability. It’s a quick procedure once the engine is at operating temperature.