Parts for your 2017 Honda Civic-Throttle position sensors

2017 Honda Civic Throttle Position Sensors (TPS): What They Do and How to Look After Them

Technical references such as the Honda Civic 2016–2019 Service Manual (Electronic Throttle Control section), Honda OBD-II DTC listings (P0122, P0222, P2135 for TP Sensor A/B correlation), and OEM parts catalogues confirm the 2017 Honda Civic uses dual throttle position sensors integrated into the electronic throttle body. They’re not a separate, adjustable item, on most trims the sensors are part of the throttle body assembly.

The 2017 Honda Civic runs a drive-by-wire setup, so throttle position sensors are critical. Two independent sensors (TP Sensor A and B) track the exact angle of the throttle blade and report it to the engine control unit. That info steers fuelling, ignition timing, idle control and—on 1.5L turbo models—boost and torque requests. The dual-sensor design provides redundancy, so if one reading looks off, the ECU can flag a fault and protect the engine with reduced power rather than leaving the driver stranded.

These sensors aren’t a routine replacement item, they’re sealed and non-adjustable. Servicing focuses on prevention and verification. Keeping the throttle body clean helps the sensors and motor achieve smooth airflow at small openings. Use a proper throttle body cleaner and a lint-free cloth, and avoid flooding the electronics. Don’t force the throttle plate open by hand. Check the harness and connector for corrosion or chafing near the intake tube, and make sure the airbox and PCV hoses are snug to stop dust sneaking in.

If a Civic shows a check engine light, rough idle, flat spots off the line, cruise control dropping out, or goes into limp mode, scan for codes such as P0122/P0222/P2135. Compare live data for TP Sensor A vs B, they should track closely. When a sensor fault is confirmed, note that on most 2017 Civics the fix is replacing the throttle body assembly with a new gasket, rather than swapping a separate TPS. After installation, perform the idle learn/calibration procedure (via scan tool or the Honda manual’s steps) so the ECU can relearn the new throttle’s rest and sweep points. There’s no set interval—many last the life of the vehicle—but if replacement is needed, expect roughly an hour of labour and make sure the battery is disconnected, fasteners are torqued correctly, and final checks include a warm idle and road test.

• Common symptoms: erratic idle, hesitation, reduced power, MIL on, and TP A/B correlation codes.
• Best practice: clean sensibly, protect connectors, verify with scan data, and complete idle learn after any throttle body work.

FAQs

Does a 2017 Honda Civic have a throttle position sensor?
Yes. It uses two throttle position sensors built into the electronic throttle body. Honda’s service manual and fault code list reference TP Sensor A and TP Sensor B for this model, confirming their role in the drive-by-wire system.

Can the TPS be replaced separately on a 2017 Civic?
Generally, no. On most trims the TPS is integrated with the throttle body and isn’t serviced on its own. If testing confirms a sensor fault, the recommended repair is to replace the throttle body assembly and then carry out the idle learn procedure.

What are the signs of a failing TPS on this model?
Typical signs include a check engine light, uneven idle, hesitation, reduced power (limp mode), and cruise control cutting out. Scan tool codes such as P0122, P0222, or P2135 and mismatched TP A/B readings point strongly to a TPS or throttle body issue.