Parts for your 2005 Honda Accord-Throttle position sensors

2005 Honda Accord Throttle Position Sensors (TPS)

Based on factory Honda service information for the 2005 Accord and professional databases (Honda Service Manual – Fuel & Emissions/PGM‑FI, plus Alldata/Mitchell1 wiring and DTC charts), a throttle position sensor is used on this model. The 2.4‑litre K‑series (cable throttle) has a separate TPS mounted on the throttle body. The 3.0‑litre V6 uses electronic throttle control, with dual throttle position sensors built into the throttle body assembly (not serviced separately). So yes, the TPS is relevant and fitted on the 2005 Honda Accord.

The TPS monitors how far the throttle plate is opened and feeds that position to the engine control module. The ECU uses this to fine‑tune fuel delivery, ignition timing, idle control, and even auto‑trans shift behaviour. It helps the car recognise closed throttle for smooth idle and decel fuel cut, and wide‑open throttle for maximum power. If the TPS goes out of range or the signal is jumpy, drivability suffers—think flat spots, surging, harsh shifts, or poor fuel economy—and you’ll often see fault codes like P0121–P0123, P0221 or P2135.

Servicing tips for a 2005 Accord TPS depend on engine type. On the 2.4‑litre, the TPS is a separate unit on the throttle body. During routine servicing, it’s smart to inspect the connector and wiring for corrosion or chafing and to clean the throttle bore gently with throttle‑safe cleaner. A scan tool check of throttle percentage should sweep smoothly from closed to wide open, a multimeter test should likewise show a smooth voltage rise. Replacement isn’t a scheduled item—only do it if it fails—but if fitting an aftermarket TPS, follow service information closely. Some sensors require slight rotational alignment to the factory spec, others are fixed‑position. After any work, clear codes and perform an idle learn so the ECU settles into a stable idle.

On the V6, the TPS is integrated into the electronic throttle body (dual sensors A/B). There’s no separate TPS to replace, if the TP signal is faulty, Honda directs replacement of the throttle body assembly. Don’t force the throttle plate by hand, and avoid harsh solvents. After cleaning or replacement, perform the throttle/idle learn procedure with a scan tool or the specified key‑on/idle routine so it behaves properly in day‑to‑day driving across Aussie and Kiwi conditions.

Does a 2005 Honda Accord have a throttle position sensor?

Yes. The 2.4‑litre four‑cylinder uses a separate TPS on the throttle body. The 3.0‑litre V6 has dual TP sensors built into the electronic throttle body. Both setups feed throttle angle to the ECU for fuelling, timing and shift control.

What are common signs the TPS is failing on a 2005 Accord?

Drivers may notice hesitation off the line, surging at steady cruise, erratic idle, harsh or odd shifting in autos, poor fuel economy, or the check‑engine light with codes such as P0121–P0123, P0221 or P2135. A scan tool will often show an irregular throttle angle sweep when the sensor is faulty.

After replacing or cleaning, does the TPS/throttle need a relearn?

It’s a good idea. On the 2.4‑litre, clear codes and perform an idle learn (fully warm, all accessories off, let it idle for several minutes, then drive at mixed speeds). On the V6 electronic throttle, use a scan tool’s throttle/idle learn or follow the factory key‑on/idle sequence so the ECU relearns the correct positions.