Parts for your 2015 Honda Civic-Throttle position sensors

2015 Honda Civic Throttle Position Sensor (TPS)

Yes — a throttle position sensor is relevant and used on the 2015 Honda Civic. Honda’s Electronic Throttle Control System for the 2012–2015 Civic (R18Z1 1.8L and K24Z7 2.4L) integrates dual throttle position sensors (TP Sensor A/B) into the throttle body. This is documented in the Honda Service Manual (Fuel & Emissions – Electronic Throttle Control) and reflected in Honda fault codes such as P0121–P0123 and P2135 for TP sensor correlation. On these models, the TPS is part of the throttle body assembly and typically isn’t serviced separately.

On a 2015 Civic, the TPS tells the engine computer exactly how far the throttle plate is open. That data, cross-checked with the accelerator pedal position sensors, helps the ECU juggle fuel, spark, and idle speed so it feels smooth, responsive, and efficient. When the TPS readings go off, the car can feel hesitant, surge, or fall into limp mode, and the check engine light will usually have a say about it.

Typical giveaway signs of a dodgy TPS on this Civic include:

• Unstable idle, flat spots, or stalling at lights
• Slow or jumpy throttle response and poor fuel economy
• Check engine light with codes like P0121–P0123 or P2135

Servicing-wise, the TPS is built into the throttle body. If testing confirms the sensor is faulty, the fix is usually to replace the entire throttle body. Before condemning it, check the wiring, connector pins, and grounds — a loose plug or corrosion can mimic sensor faults. If the throttle body is replaced or cleaned, perform an idle/throttle relearn so the ECU can recalibrate. A proper scan tool (or Honda HDS) makes this quick, otherwise follow the manual’s idle learn steps after the engine’s at operating temp.

Preventive care helps: keep the intake tract and air filter clean, and every 40–60,000 kilometres consider a careful throttle body clean using sensor-safe cleaner. Don’t force the throttle plate by hand and avoid soaking the electronics. If symptoms persist after a clean, scan for codes and live data — TP Sensor A/B should track smoothly and agree with each other and with accelerator pedal data. If they don’t, it’s time to test further or swap the throttle body assembly and new gasket, then clear codes and complete the relearn.

FAQs

Does the 2015 Honda Civic have a separate, replaceable TPS?
The TPS function is integrated into the throttle body with dual sensors. On most 2015 Civics, the sensor isn’t sold separately — the standard repair is replacing the throttle body assembly, then performing an idle/throttle relearn with a scan tool.

Where is the TPS on a 2015 Civic?
It’s built into the electronic throttle body mounted on the intake manifold. You’ll see the throttle motor and the sealed sensor housing on the side of the unit. The accelerator pedal also has its own position sensors, which the ECU cross-checks with the TPS.

Do I need a relearn after cleaning or replacing the throttle body?
Yes. After cleaning or replacing, carry out the idle or throttle position relearn so the ECU can adapt. Without it, you may get high/low idle, hesitation, or fresh fault codes. A scan tool makes this straightforward and reliable.