Parts for your 2003 Honda Cr-v-Throttle position sensors

2003 Honda CR‑V Throttle Position Sensor (TPS)

Referencing Honda’s 2002–2004 CR‑V Service Manual (Fuel & Emissions), the PGM‑FI system description, and the OBD‑II DTC list (which includes P0121, P0122 and P0123 for throttle position faults), the 2003 Honda CR‑V is fitted with a throttle position sensor. It’s mounted on the side of the cable‑operated throttle body on the K24A1 engine and is an essential input to the engine control unit.

The TPS tracks the throttle shaft angle and sends a changing voltage back to the ECU (about 0.5 V closed throttle to roughly 4.5 V at wide open). With that signal, the ECU fine‑tunes fuelling, ignition timing, deceleration fuel cut, and idle control. It also helps with automatic transmission shift quality and kick‑down behaviour. In short, it tells the ECU exactly how much the driver is asking for under the right foot.

There isn’t a scheduled replacement interval for the TPS, but it’s smart to assess it during regular servicing, especially if there are complaints of a hesitant take‑off, flat spots, rough or high idle, poor fuel economy, or the MIL glowing. A technician can check live data to confirm the closed‑throttle reading (typically 0–2% or ~0.48–0.52 V) and make sure the throttle angle rises smoothly with no dead spots or spikes.

Good maintenance habits help the TPS live a long life:

• Clean the throttle body periodically without soaking the sensor or flooding its seals.
• Inspect the TPS connector and wiring under the bonnet for corrosion, chafing, or loose pins.
• If water ingress or previous aftermarket work is suspected, verify the sensor earth and 5 V reference are solid.

Replacement can be straightforward, though some units use tamper‑proof screws and the factory literature may call the TPS “non‑serviceable” apart from replacing the throttle body. Quality aftermarket sensors are commonly fitted on these CR‑Vs. The key is alignment: set the closed‑throttle voltage correctly using a scan tool or multimeter, snug the screws (a dab of threadlocker helps), then perform an idle learn procedure after reconnecting the battery (warm engine, all loads off, let it idle for a few minutes, then a short road test).

If a TPS is failing, owners may notice surging, stalling at lights, or harsh shifts on autos, often with DTCs P0121–P0123. Given the modest cost of the part and the big role it plays in drivability, checking it every 40,000–60,000 kilometres as part of routine service is a sensible move.

Does a 2003 Honda CR‑V have a throttle position sensor?

Yes. Honda’s PGM‑FI documentation and the factory Service Manual confirm a TPS is fitted to the K24A1’s cable‑driven throttle body. It’s a primary input used for fuelling, timing, idle control and auto shift logic.

Can the TPS be replaced on its own, or does the whole throttle body need changing?

While some factory guidance treats the TPS as part of the throttle body, many reputable technicians replace the sensor alone with quality parts. Proper alignment and closed‑throttle voltage setup are critical, followed by an idle learn.

What are common symptoms of a bad TPS on a 2003 CR‑V, and how is it tested?

Typical signs include hesitant acceleration, erratic idle, sudden flat spots, harsh auto shifts and the MIL with codes P0121–P0123. Testing involves watching smooth throttle percentage on a scan tool or sweeping the signal wire with a multimeter to check for drop‑outs.