Parts for your 2021 Honda Cr-v-Throttle position sensors

2021 Honda CR‑V throttle position sensors: what’s fitted and how to look after it

Based on Honda service information for the 2017–2022 CR‑V generation (Electronic Throttle Control section of the factory service manual) and standard OBD‑II diagnostics used on the 2021 model (DTCs such as P0121–P0123 for throttle position performance and circuit faults), the 2021 Honda CR‑V is fitted with throttle position sensors. Specifically, it uses an electronic throttle body that incorporates dual throttle position sensors (TP Sensor 1 and TP Sensor 2) as part of the throttle actuator assembly. Honda wiring diagrams and workshop procedures show these sensors are integral to the throttle body and are not serviced separately, if a sensor fails, the complete throttle body is replaced.

On this CR‑V, the throttle position sensors tell the engine control unit exactly where the throttle plate sits, so it can match airflow to the driver’s accelerator input and keep idle, emissions, and driveability on song. The system is drive‑by‑wire, so alongside the throttle position pair on the throttle body there’s an accelerator pedal position sensor at the pedal. The ECU cross‑checks these signals for safety and precision, which is why faults often log as correlation codes if anything drifts out of spec.

As part of routine servicing, there’s no set replacement interval for the throttle position sensors because they’re built into the throttle body. However, they benefit from sensible care:

• Keep the intake system clean. A fresh air filter and a check for oil vapour build‑up help prevent sticky throttle plates that can confuse sensor readings.
• If idle is rough, response is laggy, or the MIL is on with codes like P0121–P0123/P2135, have a technician scan live data for TP Sensor 1/2 agreement and inspect the connector and loom under the bonnet.
• When cleaning the throttle body, avoid drowning the electronics. Use throttle‑safe cleaner sparingly and never force the plate by hand.
• If the throttle body is replaced, follow Honda procedures for ETC “relearn”/idle learn with a scan tool, and observe torque specs and gasket replacement.

Tell‑tale symptoms of sensor or throttle body drama can include erratic idle, surging, flat spots, poor fuel economy, or limp‑home mode. Because the sensors are integral, a confirmed internal fault means fitting a new genuine or high‑quality throttle body. After installation, a proper relearn ensures the CR‑V drives smoothly and recognises the plate position across its full range.

Popular questions about 2021 Honda CR‑V throttle position sensors

Does a 2021 Honda CR‑V have a throttle position sensor?
Yes. It actually has two throttle position sensors built into the electronic throttle body. They work together for accuracy and safety. If one fails or they disagree, the ECU logs a fault and may limit power.

Can the throttle position sensor be replaced on its own?
No. On this model the sensors are integral to the throttle body. A confirmed TPS fault requires replacing the complete throttle body and performing an idle/throttle relearn.

How often should the throttle body/TPS be serviced?
There’s no fixed interval. During regular services, check for deposits, inspect the connector and wiring, and clean the throttle body if idle quality or response isn’t right. Address any fault codes promptly to avoid limp mode.