Your Selected Vehicle
Parts for your 2011 Lexus Is-Throttle position sensors
Explore 4WD & Adventure
2011 Lexus IS throttle position sensor (TPS): what it does and how to look after it
Yes, the 2011 Lexus IS uses a throttle position sensor. Technical documentation confirms it’s integrated into the electronic throttle body (ETCS-i) across the IS 250 (4GR‑FSE), IS 350 (2GR‑FSE) and IS F (2UR‑GSE). The Lexus Technical Information System (TIS) repair manual for the SFI/ETCS‑i systems, the Lexus Electrical Wiring Diagram (EWD), and the Lexus Electronic Parts Catalogue all show the “Throttle with Motor Body Assembly” contains dual throttle position sensors that aren’t serviced separately. Relevant diagnostic charts list TPS-related DTCs such as P0121, P0122, P0123, P0221, P0222, P0223 and P2135, further confirming the system’s presence and function.
On this model, the TPS tracks the actual angle of the throttle plate and feeds that to the engine control module. Working with the accelerator pedal position sensor, it allows the ECU to command the throttle motor for smooth, precise response, cruise control, idle stability and emissions control. Lexus uses two TPS circuits for redundancy, so the car can detect mismatches and safeguard the engine if something’s off.
There’s no scheduled replacement for the TPS, and it’s not a standalone part. If the sensor fails testing, the fix is to replace the complete throttle body assembly. That said, it’s smart to include a careful throttle body inspection and clean during major services, especially if there are symptoms like a rough idle, lazy throttle, or a check engine light.
- When cleaning: don’t soak the unit or spray directly into the motor/sensor housing, keep solvents on a cloth and wipe the bore and plate edges.
- Check the connector and loom for corrosion, moisture ingress or bent pins. Many “sensor” faults are actually wiring issues.
- Use a new throttle body gasket if the assembly is removed, and tighten fasteners to the spec in the Lexus repair manual.
After any throttle body work or replacement, clear DTCs and perform the ETCS/throttle and idle learn procedure. A capable scan tool makes this quick, but the ECU will also relearn idle over a short drive cycle if battery power has been disconnected. If the car goes into limp mode or logs TPS codes again, recheck the wiring, air leaks downstream of the MAF, and battery health before condemning the throttle body.
Popular questions
Does a 2011 Lexus IS have a throttle position sensor?
Yes. It’s built into the electronic throttle body and uses two TPS circuits for redundancy. It isn’t adjustable and generally isn’t sold separately from the throttle body assembly.
What are common signs the TPS is playing up on a 2011 IS?
Look for a check engine light with codes like P0121–P0123, P0221–P0223 or P2135, erratic idle, hesitant acceleration, sudden limp mode, or harsh shifting. Always inspect wiring and the throttle body for contamination before replacing parts.
Can the TPS be calibrated or reset on this model?
There’s no manual adjustment. After cleaning or replacement, clear codes and run the ETCS/idle relearn with a scan tool. If a tool isn’t available, a short drive with varied loads after a battery reset will allow the ECU to relearn, provided no faults remain.
