Parts for your 2014 Honda Civic-Throttle position sensors

2014 Honda Civic throttle position sensor: purpose, servicing and replacement advice

Is a throttle position sensor relevant to a 2014 Honda Civic? Yes. Honda equips the 2014 Civic with Electronic Throttle Control (drive‑by‑wire). The throttle body contains dual throttle position sensors (often called TP Sensor A and TP Sensor B) that report butterfly angle to the engine computer. This is detailed in the Honda Civic 2012–2015 Service Manual under Electronic Throttle Control System diagnostics and DTCs P0121–P0123/P2135. Honda ServiceNews and parts catalogues also show the TP sensors integrated into the throttle body assembly on these models.

On the 2014 Civic, the throttle position sensors continually tell the ECU how far open the throttle plate is, letting the car balance power, fuel economy and emissions. Paired with the accelerator pedal position sensors, they make throttle response smooth and consistent. If those signals disagree or wander out of range, the ECU flips on the MIL, may drop into limp mode, and the driver can feel hesitation, hunting idle, or harsh gear changes.

There’s no scheduled replacement for the throttle position sensors, servicing is condition‑based. Most owners will go years without thinking about them. During routine servicing, a technician will usually:

• Scan for related DTCs (P0121–P0123, P2135) and check live data for TP Sensor A/B agreement.
• Inspect the throttle body and connector for moisture, corrosion or pin tension issues.
• Clean the throttle body bore and plate with throttle‑body safe cleaner if there’s sticking or a grubby idle.

If the sensors fail, Honda’s factory approach is to replace the throttle body assembly because the TPS units are built in and factory‑calibrated. Some aftermarket options allow sensor‑only replacement, but correct fit, orientation, and an idle/TP learn are critical. After any throttle body or sensor work, the Civic needs an ETC learn procedure—either with a scan tool or a warm‑up and base‑idle relearn—so the ECU can relearn the new closed‑throttle voltage. Avoid forcing the throttle plate by hand, that can upset the gear drive or sensor alignment.

When refitting, use a new throttle body gasket, torque fasteners to workshop‑manual spec, and clear codes. If issues persist after cleaning and relearn, check wiring continuity between the throttle body and ECU before condemning the part. Done right, the Civic’s throttle position sensors are a fit‑and‑forget item that keep the R18 engine feeling perky and predictable across Aussie and Kiwi roads.

Popular questions about 2014 Honda Civic throttle position sensors

Does the 2014 Civic actually have a throttle position sensor?
Yes. It runs dual throttle position sensors built into the electronic throttle body. Honda’s 2012–2015 Civic service info lists TP Sensor A/B and related fault codes, confirming the setup.

What are the common signs a TPS is playing up on a 2014 Civic?
Drivers may see a check‑engine light, sluggish throttle, surging or a rough idle, and the car can enter limp mode. Scan data usually shows mismatched or erratic TP Sensor A/B readings. Always rule out a dirty throttle body or dodgy connector first.

Can the TPS be replaced on its own, or is it a full throttle body job?
Honda’s OE fix is the complete throttle body because the sensors are integrated and calibrated. Some aftermarket kits offer sensor‑only swaps, but they require careful alignment and an idle/TP relearn. Many workshops prefer the full assembly for reliability.